; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py ; RUN: llc -debugify-and-strip-all-safe < %s -mtriple=aarch64-linux-gnu | FileCheck %s ; marked as external to prevent possible optimizations @a = external global i32 @b = external global i32 @c = external global i32 @d = external global i32 ; Test intra-block CSINC optimization with (a > 10) and (a >= 10) ; Two CSINC instructions should share a single CMP after optimization define void @intra_block_csinc(i32 %x, i32 %y, ptr %out1, ptr %out2) #0 { ; CHECK-LABEL: intra_block_csinc: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: adrp x8, :got:a ; CHECK-NEXT: ldr x8, [x8, :got_lo12:a] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: cmp w8, #10 ; CHECK-NEXT: csinc w8, w0, w1, gt ; CHECK-NEXT: csinc w9, w0, w1, ge ; CHECK-NEXT: str w8, [x2] ; CHECK-NEXT: str w9, [x3] ; CHECK-NEXT: ret entry: %val = load i32, ptr @a, align 4 ; First: result1 = (a > 10) ? x : (y + 1) %cond1 = icmp sgt i32 %val, 10 %y_inc1 = add i32 %y, 1 %result1 = select i1 %cond1, i32 %x, i32 %y_inc1 store i32 %result1, ptr %out1 ; Second: result2 = (a >= 10) ? x : (y + 1) ; Canonicalizes to (a > 9), then optimizes to reuse first CMP with adjusted condition %cond2 = icmp sge i32 %val, 10 %y_inc2 = add i32 %y, 1 %result2 = select i1 %cond2, i32 %x, i32 %y_inc2 store i32 %result2, ptr %out2 ret void } ; Negative test: different registers should not be optimized define void @intra_block_csinc_different_regs(i32 %x, i32 %y, ptr %out1, ptr %out2) #0 { ; CHECK-LABEL: intra_block_csinc_different_regs: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: adrp x8, :got:a ; CHECK-NEXT: adrp x9, :got:b ; CHECK-NEXT: ldr x8, [x8, :got_lo12:a] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:b] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, #10 ; CHECK-NEXT: csinc w8, w0, w1, gt ; CHECK-NEXT: cmp w9, #9 ; CHECK-NEXT: str w8, [x2] ; CHECK-NEXT: csinc w8, w0, w1, gt ; CHECK-NEXT: str w8, [x3] ; CHECK-NEXT: ret entry: %val1 = load i32, ptr @a, align 4 %val2 = load i32, ptr @b, align 4 ; First: result1 = (a > 10) ? x : (y + 1) %cond1 = icmp sgt i32 %val1, 10 %y_inc1 = add i32 %y, 1 %result1 = select i1 %cond1, i32 %x, i32 %y_inc1 store i32 %result1, ptr %out1 ; Second: result2 = (b > 9) ? x : (y + 1) - compares DIFFERENT register ; Should NOT optimize - need both CMPs %cond2 = icmp sgt i32 %val2, 9 %y_inc2 = add i32 %y, 1 %result2 = select i1 %cond2, i32 %x, i32 %y_inc2 store i32 %result2, ptr %out2 ret void } ; Test intra-block CSINC optimization with (a < 5) and (a < 6) ; LT/LT pattern - symmetric to GT/GT case define void @intra_block_csinc_lt(i32 %x, i32 %y, ptr %out1, ptr %out2) #0 { ; CHECK-LABEL: intra_block_csinc_lt: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: adrp x8, :got:a ; CHECK-NEXT: ldr x8, [x8, :got_lo12:a] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: cmp w8, #5 ; CHECK-NEXT: csinc w8, w0, w1, lt ; CHECK-NEXT: csinc w9, w0, w1, le ; CHECK-NEXT: str w8, [x2] ; CHECK-NEXT: str w9, [x3] ; CHECK-NEXT: ret entry: %val = load i32, ptr @a, align 4 ; First: result1 = (a < 5) ? x : (y + 1) %cond1 = icmp slt i32 %val, 5 %y_inc1 = add i32 %y, 1 %result1 = select i1 %cond1, i32 %x, i32 %y_inc1 store i32 %result1, ptr %out1 ; Second: result2 = (a < 6) ? x : (y + 1) ; Optimizes to reuse first CMP (#5) with adjusted condition (le) %cond2 = icmp slt i32 %val, 6 %y_inc2 = add i32 %y, 1 %result2 = select i1 %cond2, i32 %x, i32 %y_inc2 store i32 %result2, ptr %out2 ret void } ; (a > 10 && b == c) || (a >= 10 && b == d) define i32 @combine_gt_ge_10() #0 { ; CHECK-LABEL: combine_gt_ge_10: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: adrp x8, :got:a ; CHECK-NEXT: ldr x8, [x8, :got_lo12:a] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: cmp w8, #10 ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: b.le .LBB3_3 ; CHECK-NEXT: // %bb.1: // %land.lhs.true ; CHECK-NEXT: adrp x9, :got:c ; CHECK-NEXT: ldr x9, [x9, :got_lo12:c] ; CHECK-NEXT: ldr w10, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w10, w9 ; CHECK-NEXT: b.ne .LBB3_4 ; CHECK-NEXT: // %bb.2: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB3_3: // %lor.lhs.false ; CHECK-NEXT: b.lt .LBB3_6 ; CHECK-NEXT: .LBB3_4: // %land.lhs.true3 ; CHECK-NEXT: adrp x9, :got:d ; CHECK-NEXT: ldr x9, [x9, :got_lo12:d] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB3_6 ; CHECK-NEXT: // %bb.5: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB3_6: // %if.end ; CHECK-NEXT: mov w0, wzr ; CHECK-NEXT: ret entry: %0 = load i32, ptr @a, align 4 %cmp = icmp sgt i32 %0, 10 br i1 %cmp, label %land.lhs.true, label %lor.lhs.false land.lhs.true: ; preds = %entry %1 = load i32, ptr @b, align 4 %2 = load i32, ptr @c, align 4 %cmp1 = icmp eq i32 %1, %2 br i1 %cmp1, label %return, label %land.lhs.true3 lor.lhs.false: ; preds = %entry %cmp2 = icmp sgt i32 %0, 9 br i1 %cmp2, label %land.lhs.true3, label %if.end land.lhs.true3: ; preds = %lor.lhs.false, %land.lhs.true %3 = load i32, ptr @b, align 4 %4 = load i32, ptr @d, align 4 %cmp4 = icmp eq i32 %3, %4 br i1 %cmp4, label %return, label %if.end if.end: ; preds = %land.lhs.true3, %lor.lhs.false br label %return return: ; preds = %if.end, %land.lhs.true3, %land.lhs.true %retval.0 = phi i32 [ 0, %if.end ], [ 1, %land.lhs.true3 ], [ 1, %land.lhs.true ] ret i32 %retval.0 } ; (a > 5 && b == c) || (a < 5 && b == d) define i32 @combine_gt_lt_5() #0 { ; CHECK-LABEL: combine_gt_lt_5: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: adrp x8, :got:a ; CHECK-NEXT: ldr x8, [x8, :got_lo12:a] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: cmp w8, #5 ; CHECK-NEXT: b.le .LBB4_3 ; CHECK-NEXT: // %bb.1: // %land.lhs.true ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:c ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:c] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB4_6 ; CHECK-NEXT: // %bb.2: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB4_3: // %lor.lhs.false ; CHECK-NEXT: b.ge .LBB4_6 ; CHECK-NEXT: // %bb.4: // %land.lhs.true3 ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:d ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:d] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB4_6 ; CHECK-NEXT: // %bb.5: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB4_6: // %if.end ; CHECK-NEXT: mov w0, wzr ; CHECK-NEXT: ret entry: %0 = load i32, ptr @a, align 4 %cmp = icmp sgt i32 %0, 5 br i1 %cmp, label %land.lhs.true, label %lor.lhs.false land.lhs.true: ; preds = %entry %1 = load i32, ptr @b, align 4 %2 = load i32, ptr @c, align 4 %cmp1 = icmp eq i32 %1, %2 br i1 %cmp1, label %return, label %if.end lor.lhs.false: ; preds = %entry %cmp2 = icmp slt i32 %0, 5 br i1 %cmp2, label %land.lhs.true3, label %if.end land.lhs.true3: ; preds = %lor.lhs.false %3 = load i32, ptr @b, align 4 %4 = load i32, ptr @d, align 4 %cmp4 = icmp eq i32 %3, %4 br i1 %cmp4, label %return, label %if.end if.end: ; preds = %land.lhs.true3, %lor.lhs.false, %land.lhs.true br label %return return: ; preds = %if.end, %land.lhs.true3, %land.lhs.true %retval.0 = phi i32 [ 0, %if.end ], [ 1, %land.lhs.true3 ], [ 1, %land.lhs.true ] ret i32 %retval.0 } ; (a < 5 && b == c) || (a <= 5 && b == d) define i32 @combine_lt_ge_5() #0 { ; CHECK-LABEL: combine_lt_ge_5: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: adrp x8, :got:a ; CHECK-NEXT: ldr x8, [x8, :got_lo12:a] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: cmp w8, #5 ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: b.ge .LBB5_3 ; CHECK-NEXT: // %bb.1: // %land.lhs.true ; CHECK-NEXT: adrp x9, :got:c ; CHECK-NEXT: ldr x9, [x9, :got_lo12:c] ; CHECK-NEXT: ldr w10, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w10, w9 ; CHECK-NEXT: b.ne .LBB5_4 ; CHECK-NEXT: // %bb.2: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB5_3: // %lor.lhs.false ; CHECK-NEXT: b.gt .LBB5_6 ; CHECK-NEXT: .LBB5_4: // %land.lhs.true3 ; CHECK-NEXT: adrp x9, :got:d ; CHECK-NEXT: ldr x9, [x9, :got_lo12:d] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB5_6 ; CHECK-NEXT: // %bb.5: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB5_6: // %if.end ; CHECK-NEXT: mov w0, wzr ; CHECK-NEXT: ret entry: %0 = load i32, ptr @a, align 4 %cmp = icmp slt i32 %0, 5 br i1 %cmp, label %land.lhs.true, label %lor.lhs.false land.lhs.true: ; preds = %entry %1 = load i32, ptr @b, align 4 %2 = load i32, ptr @c, align 4 %cmp1 = icmp eq i32 %1, %2 br i1 %cmp1, label %return, label %land.lhs.true3 lor.lhs.false: ; preds = %entry %cmp2 = icmp slt i32 %0, 6 br i1 %cmp2, label %land.lhs.true3, label %if.end land.lhs.true3: ; preds = %lor.lhs.false, %land.lhs.true %3 = load i32, ptr @b, align 4 %4 = load i32, ptr @d, align 4 %cmp4 = icmp eq i32 %3, %4 br i1 %cmp4, label %return, label %if.end if.end: ; preds = %land.lhs.true3, %lor.lhs.false br label %return return: ; preds = %if.end, %land.lhs.true3, %land.lhs.true %retval.0 = phi i32 [ 0, %if.end ], [ 1, %land.lhs.true3 ], [ 1, %land.lhs.true ] ret i32 %retval.0 } ; (a < 5 && b == c) || (a > 5 && b == d) define i32 @combine_lt_gt_5() #0 { ; CHECK-LABEL: combine_lt_gt_5: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: adrp x8, :got:a ; CHECK-NEXT: ldr x8, [x8, :got_lo12:a] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: cmp w8, #5 ; CHECK-NEXT: b.ge .LBB6_3 ; CHECK-NEXT: // %bb.1: // %land.lhs.true ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:c ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:c] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB6_6 ; CHECK-NEXT: // %bb.2: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB6_3: // %lor.lhs.false ; CHECK-NEXT: b.le .LBB6_6 ; CHECK-NEXT: // %bb.4: // %land.lhs.true3 ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:d ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:d] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB6_6 ; CHECK-NEXT: // %bb.5: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB6_6: // %if.end ; CHECK-NEXT: mov w0, wzr ; CHECK-NEXT: ret entry: %0 = load i32, ptr @a, align 4 %cmp = icmp slt i32 %0, 5 br i1 %cmp, label %land.lhs.true, label %lor.lhs.false land.lhs.true: ; preds = %entry %1 = load i32, ptr @b, align 4 %2 = load i32, ptr @c, align 4 %cmp1 = icmp eq i32 %1, %2 br i1 %cmp1, label %return, label %if.end lor.lhs.false: ; preds = %entry %cmp2 = icmp sgt i32 %0, 5 br i1 %cmp2, label %land.lhs.true3, label %if.end land.lhs.true3: ; preds = %lor.lhs.false %3 = load i32, ptr @b, align 4 %4 = load i32, ptr @d, align 4 %cmp4 = icmp eq i32 %3, %4 br i1 %cmp4, label %return, label %if.end if.end: ; preds = %land.lhs.true3, %lor.lhs.false, %land.lhs.true br label %return return: ; preds = %if.end, %land.lhs.true3, %land.lhs.true %retval.0 = phi i32 [ 0, %if.end ], [ 1, %land.lhs.true3 ], [ 1, %land.lhs.true ] ret i32 %retval.0 } ; (a > -5 && b == c) || (a < -5 && b == d) define i32 @combine_gt_lt_n5() #0 { ; CHECK-LABEL: combine_gt_lt_n5: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: adrp x8, :got:a ; CHECK-NEXT: ldr x8, [x8, :got_lo12:a] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: cmn w8, #5 ; CHECK-NEXT: b.le .LBB7_3 ; CHECK-NEXT: // %bb.1: // %land.lhs.true ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:c ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:c] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB7_6 ; CHECK-NEXT: // %bb.2: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB7_3: // %lor.lhs.false ; CHECK-NEXT: b.ge .LBB7_6 ; CHECK-NEXT: // %bb.4: // %land.lhs.true3 ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:d ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:d] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB7_6 ; CHECK-NEXT: // %bb.5: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB7_6: // %if.end ; CHECK-NEXT: mov w0, wzr ; CHECK-NEXT: ret entry: %0 = load i32, ptr @a, align 4 %cmp = icmp sgt i32 %0, -5 br i1 %cmp, label %land.lhs.true, label %lor.lhs.false land.lhs.true: ; preds = %entry %1 = load i32, ptr @b, align 4 %2 = load i32, ptr @c, align 4 %cmp1 = icmp eq i32 %1, %2 br i1 %cmp1, label %return, label %if.end lor.lhs.false: ; preds = %entry %cmp2 = icmp slt i32 %0, -5 br i1 %cmp2, label %land.lhs.true3, label %if.end land.lhs.true3: ; preds = %lor.lhs.false %3 = load i32, ptr @b, align 4 %4 = load i32, ptr @d, align 4 %cmp4 = icmp eq i32 %3, %4 br i1 %cmp4, label %return, label %if.end if.end: ; preds = %land.lhs.true3, %lor.lhs.false, %land.lhs.true br label %return return: ; preds = %if.end, %land.lhs.true3, %land.lhs.true %retval.0 = phi i32 [ 0, %if.end ], [ 1, %land.lhs.true3 ], [ 1, %land.lhs.true ] ret i32 %retval.0 } ; (a < -5 && b == c) || (a > -5 && b == d) define i32 @combine_lt_gt_n5() #0 { ; CHECK-LABEL: combine_lt_gt_n5: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: adrp x8, :got:a ; CHECK-NEXT: ldr x8, [x8, :got_lo12:a] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: cmn w8, #5 ; CHECK-NEXT: b.ge .LBB8_3 ; CHECK-NEXT: // %bb.1: // %land.lhs.true ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:c ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:c] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB8_6 ; CHECK-NEXT: // %bb.2: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB8_3: // %lor.lhs.false ; CHECK-NEXT: b.le .LBB8_6 ; CHECK-NEXT: // %bb.4: // %land.lhs.true3 ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:d ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:d] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB8_6 ; CHECK-NEXT: // %bb.5: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB8_6: // %if.end ; CHECK-NEXT: mov w0, wzr ; CHECK-NEXT: ret entry: %0 = load i32, ptr @a, align 4 %cmp = icmp slt i32 %0, -5 br i1 %cmp, label %land.lhs.true, label %lor.lhs.false land.lhs.true: ; preds = %entry %1 = load i32, ptr @b, align 4 %2 = load i32, ptr @c, align 4 %cmp1 = icmp eq i32 %1, %2 br i1 %cmp1, label %return, label %if.end lor.lhs.false: ; preds = %entry %cmp2 = icmp sgt i32 %0, -5 br i1 %cmp2, label %land.lhs.true3, label %if.end land.lhs.true3: ; preds = %lor.lhs.false %3 = load i32, ptr @b, align 4 %4 = load i32, ptr @d, align 4 %cmp4 = icmp eq i32 %3, %4 br i1 %cmp4, label %return, label %if.end if.end: ; preds = %land.lhs.true3, %lor.lhs.false, %land.lhs.true br label %return return: ; preds = %if.end, %land.lhs.true3, %land.lhs.true %retval.0 = phi i32 [ 0, %if.end ], [ 1, %land.lhs.true3 ], [ 1, %land.lhs.true ] ret i32 %retval.0 } %struct.Struct = type { i64, i64 } @glob = internal unnamed_addr global ptr null, align 8 declare ptr @Update(ptr) #1 ; no checks for this case, it just should be processed without errors define void @combine_non_adjacent_cmp_br(ptr nocapture readonly %hdCall) #0 { ; CHECK-LABEL: combine_non_adjacent_cmp_br: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: str x30, [sp, #-48]! // 8-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 48 ; CHECK-NEXT: stp x22, x21, [sp, #16] // 16-byte Folded Spill ; CHECK-NEXT: stp x20, x19, [sp, #32] // 16-byte Folded Spill ; CHECK-NEXT: .cfi_offset w19, -8 ; CHECK-NEXT: .cfi_offset w20, -16 ; CHECK-NEXT: .cfi_offset w21, -24 ; CHECK-NEXT: .cfi_offset w22, -32 ; CHECK-NEXT: .cfi_offset w30, -48 ; CHECK-NEXT: ldr x20, [x0] ; CHECK-NEXT: mov w19, #24 // =0x18 ; CHECK-NEXT: adrp x22, glob ; CHECK-NEXT: add x21, x20, #2 ; CHECK-NEXT: .LBB9_1: // %land.rhs ; CHECK-NEXT: // =>This Inner Loop Header: Depth=1 ; CHECK-NEXT: ldr x8, [x19] ; CHECK-NEXT: cmp x8, #1 ; CHECK-NEXT: b.lt .LBB9_3 ; CHECK-NEXT: // %bb.2: // %while.body ; CHECK-NEXT: // in Loop: Header=BB9_1 Depth=1 ; CHECK-NEXT: ldr x0, [x22, :lo12:glob] ; CHECK-NEXT: bl Update ; CHECK-NEXT: sub x21, x21, #2 ; CHECK-NEXT: cmp x20, x21 ; CHECK-NEXT: b.lt .LBB9_1 ; CHECK-NEXT: .LBB9_3: // %while.end ; CHECK-NEXT: ldp x20, x19, [sp, #32] // 16-byte Folded Reload ; CHECK-NEXT: ldp x22, x21, [sp, #16] // 16-byte Folded Reload ; CHECK-NEXT: ldr x30, [sp], #48 // 8-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w19 ; CHECK-NEXT: .cfi_restore w20 ; CHECK-NEXT: .cfi_restore w21 ; CHECK-NEXT: .cfi_restore w22 ; CHECK-NEXT: .cfi_restore w30 ; CHECK-NEXT: ret entry: %0 = load i64, ptr %hdCall, align 8 br label %land.rhs land.rhs: %rp.06 = phi i64 [ %0, %entry ], [ %sub, %while.body ] %1 = load i64, ptr inttoptr (i64 24 to ptr), align 8 %cmp2 = icmp sgt i64 %1, 0 br i1 %cmp2, label %while.body, label %while.end while.body: %2 = load ptr, ptr @glob, align 8 %call = tail call ptr @Update(ptr %2) #2 %sub = add nsw i64 %rp.06, -2 %cmp = icmp slt i64 %0, %rp.06 br i1 %cmp, label %land.rhs, label %while.end while.end: ret void } ; undefined external to prevent possible optimizations declare void @do_something() #1 define i32 @do_nothing_if_resultant_opcodes_would_differ() #0 { ; CHECK-LABEL: do_nothing_if_resultant_opcodes_would_differ: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: str x30, [sp, #-32]! // 8-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 32 ; CHECK-NEXT: stp x20, x19, [sp, #16] // 16-byte Folded Spill ; CHECK-NEXT: .cfi_offset w19, -8 ; CHECK-NEXT: .cfi_offset w20, -16 ; CHECK-NEXT: .cfi_offset w30, -32 ; CHECK-NEXT: adrp x19, :got:a ; CHECK-NEXT: ldr x19, [x19, :got_lo12:a] ; CHECK-NEXT: ldr w8, [x19] ; CHECK-NEXT: cmn w8, #2 ; CHECK-NEXT: b.gt .LBB10_4 ; CHECK-NEXT: // %bb.1: // %while.body.preheader ; CHECK-NEXT: sub w20, w8, #1 ; CHECK-NEXT: .LBB10_2: // %while.body ; CHECK-NEXT: // =>This Inner Loop Header: Depth=1 ; CHECK-NEXT: bl do_something ; CHECK-NEXT: adds w20, w20, #1 ; CHECK-NEXT: b.mi .LBB10_2 ; CHECK-NEXT: // %bb.3: // %while.cond.while.end_crit_edge ; CHECK-NEXT: ldr w8, [x19] ; CHECK-NEXT: .LBB10_4: // %while.end ; CHECK-NEXT: cmp w8, #1 ; CHECK-NEXT: b.gt .LBB10_7 ; CHECK-NEXT: // %bb.5: // %land.lhs.true ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:d ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:d] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB10_7 ; CHECK-NEXT: // %bb.6: ; CHECK-NEXT: mov w0, #123 // =0x7b ; CHECK-NEXT: b .LBB10_8 ; CHECK-NEXT: .LBB10_7: // %if.end ; CHECK-NEXT: mov w0, wzr ; CHECK-NEXT: .LBB10_8: // %return ; CHECK-NEXT: ldp x20, x19, [sp, #16] // 16-byte Folded Reload ; CHECK-NEXT: ldr x30, [sp], #32 // 8-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w19 ; CHECK-NEXT: .cfi_restore w20 ; CHECK-NEXT: .cfi_restore w30 ; CHECK-NEXT: ret entry: %0 = load i32, ptr @a, align 4 %cmp4 = icmp slt i32 %0, -1 br i1 %cmp4, label %while.body.preheader, label %while.end while.body.preheader: ; preds = %entry br label %while.body while.body: ; preds = %while.body, %while.body.preheader %i.05 = phi i32 [ %inc, %while.body ], [ %0, %while.body.preheader ] tail call void @do_something() #2 %inc = add nsw i32 %i.05, 1 %cmp = icmp slt i32 %i.05, 0 br i1 %cmp, label %while.body, label %while.cond.while.end_crit_edge while.cond.while.end_crit_edge: ; preds = %while.body %.pre = load i32, ptr @a, align 4 br label %while.end while.end: ; preds = %while.cond.while.end_crit_edge, %entry %1 = phi i32 [ %.pre, %while.cond.while.end_crit_edge ], [ %0, %entry ] %cmp1 = icmp slt i32 %1, 2 br i1 %cmp1, label %land.lhs.true, label %if.end land.lhs.true: ; preds = %while.end %2 = load i32, ptr @b, align 4 %3 = load i32, ptr @d, align 4 %cmp2 = icmp eq i32 %2, %3 br i1 %cmp2, label %return, label %if.end if.end: ; preds = %land.lhs.true, %while.end br label %return return: ; preds = %if.end, %land.lhs.true %retval.0 = phi i32 [ 0, %if.end ], [ 123, %land.lhs.true ] ret i32 %retval.0 } define i32 @do_nothing_if_compares_can_not_be_adjusted_to_each_other() #0 { ; CHECK-LABEL: do_nothing_if_compares_can_not_be_adjusted_to_each_other: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: stp x30, x19, [sp, #-16]! // 16-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: .cfi_offset w19, -8 ; CHECK-NEXT: .cfi_offset w30, -16 ; CHECK-NEXT: .cfi_remember_state ; CHECK-NEXT: adrp x8, :got:a ; CHECK-NEXT: ldr x8, [x8, :got_lo12:a] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: cmp w8, #0 ; CHECK-NEXT: b.gt .LBB11_3 ; CHECK-NEXT: // %bb.1: // %while.body.preheader ; CHECK-NEXT: sub w19, w8, #1 ; CHECK-NEXT: .LBB11_2: // %while.body ; CHECK-NEXT: // =>This Inner Loop Header: Depth=1 ; CHECK-NEXT: bl do_something ; CHECK-NEXT: adds w19, w19, #1 ; CHECK-NEXT: b.mi .LBB11_2 ; CHECK-NEXT: .LBB11_3: // %while.end ; CHECK-NEXT: adrp x8, :got:c ; CHECK-NEXT: ldr x8, [x8, :got_lo12:c] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: cmn w8, #2 ; CHECK-NEXT: b.lt .LBB11_6 ; CHECK-NEXT: // %bb.4: // %land.lhs.true ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:d ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:d] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB11_6 ; CHECK-NEXT: // %bb.5: ; CHECK-NEXT: mov w0, #123 // =0x7b ; CHECK-NEXT: ldp x30, x19, [sp], #16 // 16-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w19 ; CHECK-NEXT: .cfi_restore w30 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB11_6: // %if.end ; CHECK-NEXT: .cfi_restore_state ; CHECK-NEXT: mov w0, wzr ; CHECK-NEXT: ldp x30, x19, [sp], #16 // 16-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w19 ; CHECK-NEXT: .cfi_restore w30 ; CHECK-NEXT: ret entry: %0 = load i32, ptr @a, align 4 %cmp4 = icmp slt i32 %0, 1 br i1 %cmp4, label %while.body.preheader, label %while.end while.body.preheader: ; preds = %entry br label %while.body while.body: ; preds = %while.body, %while.body.preheader %i.05 = phi i32 [ %inc, %while.body ], [ %0, %while.body.preheader ] tail call void @do_something() #2 %inc = add nsw i32 %i.05, 1 %cmp = icmp slt i32 %i.05, 0 br i1 %cmp, label %while.body, label %while.end.loopexit while.end.loopexit: ; preds = %while.body br label %while.end while.end: ; preds = %while.end.loopexit, %entry %1 = load i32, ptr @c, align 4 %cmp1 = icmp sgt i32 %1, -3 br i1 %cmp1, label %land.lhs.true, label %if.end land.lhs.true: ; preds = %while.end %2 = load i32, ptr @b, align 4 %3 = load i32, ptr @d, align 4 %cmp2 = icmp eq i32 %2, %3 br i1 %cmp2, label %return, label %if.end if.end: ; preds = %land.lhs.true, %while.end br label %return return: ; preds = %if.end, %land.lhs.true %retval.0 = phi i32 [ 0, %if.end ], [ 123, %land.lhs.true ] ret i32 %retval.0 } ; Test in the following case, we don't hit 'cmp' and trigger a false positive ; cmp w19, #0 ; cinc w0, w19, gt ; ... ; fcmp d8, #0.0 ; b.gt .LBB0_5 define i32 @fcmpri(i32 %argc, ptr nocapture readonly %argv) #0 { ; CHECK-LABEL: fcmpri: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: cmp w0, #2 ; CHECK-NEXT: b.lt .LBB12_3 ; CHECK-NEXT: // %bb.1: // %land.lhs.true ; CHECK-NEXT: ldr x8, [x1, #8] ; CHECK-NEXT: cbz x8, .LBB12_3 ; CHECK-NEXT: // %bb.2: ; CHECK-NEXT: mov w0, #3 // =0x3 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB12_3: // %if.end ; CHECK-NEXT: str d8, [sp, #-32]! // 8-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 32 ; CHECK-NEXT: stp x30, x19, [sp, #16] // 16-byte Folded Spill ; CHECK-NEXT: .cfi_offset w19, -8 ; CHECK-NEXT: .cfi_offset w30, -16 ; CHECK-NEXT: .cfi_offset b8, -32 ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: bl zoo ; CHECK-NEXT: mov w19, w0 ; CHECK-NEXT: mov w0, #-1 // =0xffffffff ; CHECK-NEXT: bl yoo ; CHECK-NEXT: cmp w19, #0 ; CHECK-NEXT: mov w1, #2 // =0x2 ; CHECK-NEXT: fmov d8, d0 ; CHECK-NEXT: cinc w0, w19, gt ; CHECK-NEXT: bl xoo ; CHECK-NEXT: fmov d0, #-1.00000000 ; CHECK-NEXT: fcmp d8, #0.0 ; CHECK-NEXT: fmov d1, #-2.00000000 ; CHECK-NEXT: fadd d0, d8, d0 ; CHECK-NEXT: fcsel d0, d8, d0, gt ; CHECK-NEXT: bl woo ; CHECK-NEXT: ldp x30, x19, [sp, #16] // 16-byte Folded Reload ; CHECK-NEXT: mov w0, #4 // =0x4 ; CHECK-NEXT: ldr d8, [sp], #32 // 8-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w19 ; CHECK-NEXT: .cfi_restore w30 ; CHECK-NEXT: .cfi_restore b8 ; CHECK-NEXT: ret ; CHECK-LABEL-DAG: .LBB9_3 entry: %cmp = icmp sgt i32 %argc, 1 br i1 %cmp, label %land.lhs.true, label %if.end land.lhs.true: ; preds = %entry %arrayidx = getelementptr inbounds ptr, ptr %argv, i64 1 %0 = load ptr, ptr %arrayidx, align 8 %cmp1 = icmp eq ptr %0, null br i1 %cmp1, label %if.end, label %return if.end: ; preds = %land.lhs.true, %entry %call = call i32 @zoo(i32 1) %call2 = call double @yoo(i32 -1) %cmp4 = icmp sgt i32 %call, 0 %add = zext i1 %cmp4 to i32 %cond = add nsw i32 %add, %call %call7 = call i32 @xoo(i32 %cond, i32 2) %cmp9 = fcmp ogt double %call2, 0.000000e+00 br i1 %cmp9, label %cond.end14, label %cond.false12 cond.false12: ; preds = %if.end %sub = fadd fast double %call2, -1.000000e+00 br label %cond.end14 cond.end14: ; preds = %if.end, %cond.false12 %cond15 = phi double [ %sub, %cond.false12 ], [ %call2, %if.end ] %call16 = call i32 @woo(double %cond15, double -2.000000e+00) br label %return return: ; preds = %land.lhs.true, %cond.end14 %retval.0 = phi i32 [ 4, %cond.end14 ], [ 3, %land.lhs.true ] ret i32 %retval.0 } define void @cmp_shifted(i32 %in, i32 %lhs, i32 %rhs) #0 { ; CHECK-LABEL: cmp_shifted: ; CHECK: // %bb.0: // %common.ret ; CHECK-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: .cfi_offset w30, -16 ; CHECK-NEXT: mov w8, #42 // =0x2a ; CHECK-NEXT: cmp w0, #0 ; CHECK-NEXT: mov w9, #128 // =0x80 ; CHECK-NEXT: csinc w8, w8, wzr, gt ; CHECK-NEXT: cmp w0, #2, lsl #12 // =8192 ; CHECK-NEXT: csel w0, w9, w8, ge ; CHECK-NEXT: bl zoo ; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w30 ; CHECK-NEXT: ret ; [...] %tst_low = icmp sgt i32 %in, 8191 br i1 %tst_low, label %true, label %false true: call i32 @zoo(i32 128) ret void false: %tst = icmp sgt i32 %in, 0 br i1 %tst, label %truer, label %falser truer: call i32 @zoo(i32 42) ret void falser: call i32 @zoo(i32 1) ret void } define i32 @combine_gt_ge_sel(i64 %v, ptr %p) #0 { ; CHECK-LABEL: combine_gt_ge_sel: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: adrp x8, :got:a ; CHECK-NEXT: ldr x8, [x8, :got_lo12:a] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: cmp w8, #0 ; CHECK-NEXT: csel x9, x0, xzr, gt ; CHECK-NEXT: str x9, [x1] ; CHECK-NEXT: b.le .LBB14_2 ; CHECK-NEXT: // %bb.1: // %lor.lhs.false ; CHECK-NEXT: cmp w8, #2 ; CHECK-NEXT: b.ge .LBB14_4 ; CHECK-NEXT: b .LBB14_6 ; CHECK-NEXT: .LBB14_2: // %land.lhs.true ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:c ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:c] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB14_4 ; CHECK-NEXT: // %bb.3: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB14_4: // %land.lhs.true3 ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:d ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:d] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB14_6 ; CHECK-NEXT: // %bb.5: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB14_6: // %if.end ; CHECK-NEXT: mov w0, wzr ; CHECK-NEXT: ret entry: %0 = load i32, ptr @a, align 4 %cmp = icmp sgt i32 %0, 0 %m = select i1 %cmp, i64 %v, i64 0 store i64 %m, ptr %p br i1 %cmp, label %lor.lhs.false, label %land.lhs.true land.lhs.true: ; preds = %entry %1 = load i32, ptr @b, align 4 %2 = load i32, ptr @c, align 4 %cmp1 = icmp eq i32 %1, %2 br i1 %cmp1, label %return, label %land.lhs.true3 lor.lhs.false: ; preds = %entry %cmp2 = icmp sgt i32 %0, 1 br i1 %cmp2, label %land.lhs.true3, label %if.end land.lhs.true3: ; preds = %lor.lhs.false, %land.lhs.true %3 = load i32, ptr @b, align 4 %4 = load i32, ptr @d, align 4 %cmp4 = icmp eq i32 %3, %4 br i1 %cmp4, label %return, label %if.end if.end: ; preds = %land.lhs.true3, %lor.lhs.false br label %return return: ; preds = %if.end, %land.lhs.true3, %land.lhs.true %retval.0 = phi i32 [ 0, %if.end ], [ 1, %land.lhs.true3 ], [ 1, %land.lhs.true ] ret i32 %retval.0 } ; Negative test: cross-block with different registers should not be optimized. ; Identical to combine_gt_ge_10, but lor.lhs.false compares @b instead of @a. ; (a > 10 && b == c) || (b >= 10 && b == d) define i32 @combine_gt_ge_different_regs() #0 { ; CHECK-LABEL: combine_gt_ge_different_regs: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: adrp x8, :got:a ; CHECK-NEXT: ldr x8, [x8, :got_lo12:a] ; CHECK-NEXT: ldr w10, [x8] ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: cmp w10, #11 ; CHECK-NEXT: ldr w9, [x8] ; CHECK-NEXT: b.lt .LBB15_3 ; CHECK-NEXT: // %bb.1: // %land.lhs.true ; CHECK-NEXT: adrp x10, :got:c ; CHECK-NEXT: ldr x10, [x10, :got_lo12:c] ; CHECK-NEXT: ldr w10, [x10] ; CHECK-NEXT: cmp w9, w10 ; CHECK-NEXT: b.ne .LBB15_4 ; CHECK-NEXT: // %bb.2: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB15_3: // %lor.lhs.false ; CHECK-NEXT: cmp w9, #10 ; CHECK-NEXT: b.lt .LBB15_6 ; CHECK-NEXT: .LBB15_4: // %land.lhs.true3 ; CHECK-NEXT: adrp x9, :got:d ; CHECK-NEXT: ldr x9, [x9, :got_lo12:d] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB15_6 ; CHECK-NEXT: // %bb.5: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB15_6: // %if.end ; CHECK-NEXT: mov w0, wzr ; CHECK-NEXT: ret entry: %0 = load i32, ptr @a, align 4 %cmp = icmp sgt i32 %0, 10 br i1 %cmp, label %land.lhs.true, label %lor.lhs.false land.lhs.true: ; preds = %entry %1 = load i32, ptr @b, align 4 %2 = load i32, ptr @c, align 4 %cmp1 = icmp eq i32 %1, %2 br i1 %cmp1, label %return, label %land.lhs.true3 lor.lhs.false: ; preds = %entry %3 = load i32, ptr @b, align 4 %cmp2 = icmp sgt i32 %3, 9 br i1 %cmp2, label %land.lhs.true3, label %if.end land.lhs.true3: ; preds = %lor.lhs.false, %land.lhs.true %4 = load i32, ptr @b, align 4 %5 = load i32, ptr @d, align 4 %cmp4 = icmp eq i32 %4, %5 br i1 %cmp4, label %return, label %if.end if.end: ; preds = %land.lhs.true3, %lor.lhs.false br label %return return: ; preds = %if.end, %land.lhs.true3, %land.lhs.true %retval.0 = phi i32 [ 0, %if.end ], [ 1, %land.lhs.true3 ], [ 1, %land.lhs.true ] ret i32 %retval.0 } ; (a > 10 && b == c) || (a >= 10 && b == d) define i32 @combine_ugt_uge_10() #0 { ; CHECK-LABEL: combine_ugt_uge_10: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: adrp x8, :got:a ; CHECK-NEXT: ldr x8, [x8, :got_lo12:a] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: cmp w8, #10 ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: b.ls .LBB16_3 ; CHECK-NEXT: // %bb.1: // %land.lhs.true ; CHECK-NEXT: adrp x9, :got:c ; CHECK-NEXT: ldr x9, [x9, :got_lo12:c] ; CHECK-NEXT: ldr w10, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w10, w9 ; CHECK-NEXT: b.ne .LBB16_4 ; CHECK-NEXT: // %bb.2: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB16_3: // %lor.lhs.false ; CHECK-NEXT: b.lo .LBB16_6 ; CHECK-NEXT: .LBB16_4: // %land.lhs.true3 ; CHECK-NEXT: adrp x9, :got:d ; CHECK-NEXT: ldr x9, [x9, :got_lo12:d] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB16_6 ; CHECK-NEXT: // %bb.5: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB16_6: // %if.end ; CHECK-NEXT: mov w0, wzr ; CHECK-NEXT: ret entry: %0 = load i32, ptr @a, align 4 %cmp = icmp ugt i32 %0, 10 br i1 %cmp, label %land.lhs.true, label %lor.lhs.false land.lhs.true: ; preds = %entry %1 = load i32, ptr @b, align 4 %2 = load i32, ptr @c, align 4 %cmp1 = icmp eq i32 %1, %2 br i1 %cmp1, label %return, label %land.lhs.true3 lor.lhs.false: ; preds = %entry %cmp2 = icmp ugt i32 %0, 9 br i1 %cmp2, label %land.lhs.true3, label %if.end land.lhs.true3: ; preds = %lor.lhs.false, %land.lhs.true %3 = load i32, ptr @b, align 4 %4 = load i32, ptr @d, align 4 %cmp4 = icmp eq i32 %3, %4 br i1 %cmp4, label %return, label %if.end if.end: ; preds = %land.lhs.true3, %lor.lhs.false br label %return return: ; preds = %if.end, %land.lhs.true3, %land.lhs.true %retval.0 = phi i32 [ 0, %if.end ], [ 1, %land.lhs.true3 ], [ 1, %land.lhs.true ] ret i32 %retval.0 } ; (a > 5 && b == c) || (a < 5 && b == d) define i32 @combine_ugt_ult_5() #0 { ; CHECK-LABEL: combine_ugt_ult_5: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: adrp x8, :got:a ; CHECK-NEXT: ldr x8, [x8, :got_lo12:a] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: cmp w8, #5 ; CHECK-NEXT: b.ls .LBB17_3 ; CHECK-NEXT: // %bb.1: // %land.lhs.true ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:c ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:c] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB17_6 ; CHECK-NEXT: // %bb.2: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB17_3: // %lor.lhs.false ; CHECK-NEXT: b.hs .LBB17_6 ; CHECK-NEXT: // %bb.4: // %land.lhs.true3 ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:d ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:d] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB17_6 ; CHECK-NEXT: // %bb.5: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB17_6: // %if.end ; CHECK-NEXT: mov w0, wzr ; CHECK-NEXT: ret entry: %0 = load i32, ptr @a, align 4 %cmp = icmp ugt i32 %0, 5 br i1 %cmp, label %land.lhs.true, label %lor.lhs.false land.lhs.true: ; preds = %entry %1 = load i32, ptr @b, align 4 %2 = load i32, ptr @c, align 4 %cmp1 = icmp eq i32 %1, %2 br i1 %cmp1, label %return, label %if.end lor.lhs.false: ; preds = %entry %cmp2 = icmp ult i32 %0, 5 br i1 %cmp2, label %land.lhs.true3, label %if.end land.lhs.true3: ; preds = %lor.lhs.false %3 = load i32, ptr @b, align 4 %4 = load i32, ptr @d, align 4 %cmp4 = icmp eq i32 %3, %4 br i1 %cmp4, label %return, label %if.end if.end: ; preds = %land.lhs.true3, %lor.lhs.false, %land.lhs.true br label %return return: ; preds = %if.end, %land.lhs.true3, %land.lhs.true %retval.0 = phi i32 [ 0, %if.end ], [ 1, %land.lhs.true3 ], [ 1, %land.lhs.true ] ret i32 %retval.0 } ; (a < 5 && b == c) || (a <= 5 && b == d) define i32 @combine_ult_uge_5() #0 { ; CHECK-LABEL: combine_ult_uge_5: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: adrp x8, :got:a ; CHECK-NEXT: ldr x8, [x8, :got_lo12:a] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: cmp w8, #5 ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: b.hs .LBB18_3 ; CHECK-NEXT: // %bb.1: // %land.lhs.true ; CHECK-NEXT: adrp x9, :got:c ; CHECK-NEXT: ldr x9, [x9, :got_lo12:c] ; CHECK-NEXT: ldr w10, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w10, w9 ; CHECK-NEXT: b.ne .LBB18_4 ; CHECK-NEXT: // %bb.2: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB18_3: // %lor.lhs.false ; CHECK-NEXT: b.hi .LBB18_6 ; CHECK-NEXT: .LBB18_4: // %land.lhs.true3 ; CHECK-NEXT: adrp x9, :got:d ; CHECK-NEXT: ldr x9, [x9, :got_lo12:d] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB18_6 ; CHECK-NEXT: // %bb.5: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB18_6: // %if.end ; CHECK-NEXT: mov w0, wzr ; CHECK-NEXT: ret entry: %0 = load i32, ptr @a, align 4 %cmp = icmp ult i32 %0, 5 br i1 %cmp, label %land.lhs.true, label %lor.lhs.false land.lhs.true: ; preds = %entry %1 = load i32, ptr @b, align 4 %2 = load i32, ptr @c, align 4 %cmp1 = icmp eq i32 %1, %2 br i1 %cmp1, label %return, label %land.lhs.true3 lor.lhs.false: ; preds = %entry %cmp2 = icmp ult i32 %0, 6 br i1 %cmp2, label %land.lhs.true3, label %if.end land.lhs.true3: ; preds = %lor.lhs.false, %land.lhs.true %3 = load i32, ptr @b, align 4 %4 = load i32, ptr @d, align 4 %cmp4 = icmp eq i32 %3, %4 br i1 %cmp4, label %return, label %if.end if.end: ; preds = %land.lhs.true3, %lor.lhs.false br label %return return: ; preds = %if.end, %land.lhs.true3, %land.lhs.true %retval.0 = phi i32 [ 0, %if.end ], [ 1, %land.lhs.true3 ], [ 1, %land.lhs.true ] ret i32 %retval.0 } ; (a < 5 && b == c) || (a > 5 && b == d) define i32 @combine_ult_ugt_5() #0 { ; CHECK-LABEL: combine_ult_ugt_5: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: adrp x8, :got:a ; CHECK-NEXT: ldr x8, [x8, :got_lo12:a] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: cmp w8, #5 ; CHECK-NEXT: b.hs .LBB19_3 ; CHECK-NEXT: // %bb.1: // %land.lhs.true ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:c ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:c] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB19_6 ; CHECK-NEXT: // %bb.2: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB19_3: // %lor.lhs.false ; CHECK-NEXT: b.ls .LBB19_6 ; CHECK-NEXT: // %bb.4: // %land.lhs.true3 ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:d ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:d] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB19_6 ; CHECK-NEXT: // %bb.5: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB19_6: // %if.end ; CHECK-NEXT: mov w0, wzr ; CHECK-NEXT: ret entry: %0 = load i32, ptr @a, align 4 %cmp = icmp ult i32 %0, 5 br i1 %cmp, label %land.lhs.true, label %lor.lhs.false land.lhs.true: ; preds = %entry %1 = load i32, ptr @b, align 4 %2 = load i32, ptr @c, align 4 %cmp1 = icmp eq i32 %1, %2 br i1 %cmp1, label %return, label %if.end lor.lhs.false: ; preds = %entry %cmp2 = icmp ugt i32 %0, 5 br i1 %cmp2, label %land.lhs.true3, label %if.end land.lhs.true3: ; preds = %lor.lhs.false %3 = load i32, ptr @b, align 4 %4 = load i32, ptr @d, align 4 %cmp4 = icmp eq i32 %3, %4 br i1 %cmp4, label %return, label %if.end if.end: ; preds = %land.lhs.true3, %lor.lhs.false, %land.lhs.true br label %return return: ; preds = %if.end, %land.lhs.true3, %land.lhs.true %retval.0 = phi i32 [ 0, %if.end ], [ 1, %land.lhs.true3 ], [ 1, %land.lhs.true ] ret i32 %retval.0 } ; (a > -5 && b == c) || (a < -5 && b == d) define i32 @combine_ugt_ult_n5() #0 { ; CHECK-LABEL: combine_ugt_ult_n5: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: adrp x8, :got:a ; CHECK-NEXT: ldr x8, [x8, :got_lo12:a] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: cmn w8, #5 ; CHECK-NEXT: b.ls .LBB20_3 ; CHECK-NEXT: // %bb.1: // %land.lhs.true ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:c ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:c] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB20_6 ; CHECK-NEXT: // %bb.2: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB20_3: // %lor.lhs.false ; CHECK-NEXT: b.hs .LBB20_6 ; CHECK-NEXT: // %bb.4: // %land.lhs.true3 ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:d ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:d] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB20_6 ; CHECK-NEXT: // %bb.5: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB20_6: // %if.end ; CHECK-NEXT: mov w0, wzr ; CHECK-NEXT: ret entry: %0 = load i32, ptr @a, align 4 %cmp = icmp ugt i32 %0, -5 br i1 %cmp, label %land.lhs.true, label %lor.lhs.false land.lhs.true: ; preds = %entry %1 = load i32, ptr @b, align 4 %2 = load i32, ptr @c, align 4 %cmp1 = icmp eq i32 %1, %2 br i1 %cmp1, label %return, label %if.end lor.lhs.false: ; preds = %entry %cmp2 = icmp ult i32 %0, -5 br i1 %cmp2, label %land.lhs.true3, label %if.end land.lhs.true3: ; preds = %lor.lhs.false %3 = load i32, ptr @b, align 4 %4 = load i32, ptr @d, align 4 %cmp4 = icmp eq i32 %3, %4 br i1 %cmp4, label %return, label %if.end if.end: ; preds = %land.lhs.true3, %lor.lhs.false, %land.lhs.true br label %return return: ; preds = %if.end, %land.lhs.true3, %land.lhs.true %retval.0 = phi i32 [ 0, %if.end ], [ 1, %land.lhs.true3 ], [ 1, %land.lhs.true ] ret i32 %retval.0 } ; (a < -5 && b == c) || (a > -5 && b == d) define i32 @combine_ult_ugt_n5() #0 { ; CHECK-LABEL: combine_ult_ugt_n5: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: adrp x8, :got:a ; CHECK-NEXT: ldr x8, [x8, :got_lo12:a] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: cmn w8, #5 ; CHECK-NEXT: b.hs .LBB21_3 ; CHECK-NEXT: // %bb.1: // %land.lhs.true ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:c ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:c] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB21_6 ; CHECK-NEXT: // %bb.2: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB21_3: // %lor.lhs.false ; CHECK-NEXT: b.ls .LBB21_6 ; CHECK-NEXT: // %bb.4: // %land.lhs.true3 ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:d ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:d] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB21_6 ; CHECK-NEXT: // %bb.5: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB21_6: // %if.end ; CHECK-NEXT: mov w0, wzr ; CHECK-NEXT: ret entry: %0 = load i32, ptr @a, align 4 %cmp = icmp ult i32 %0, -5 br i1 %cmp, label %land.lhs.true, label %lor.lhs.false land.lhs.true: ; preds = %entry %1 = load i32, ptr @b, align 4 %2 = load i32, ptr @c, align 4 %cmp1 = icmp eq i32 %1, %2 br i1 %cmp1, label %return, label %if.end lor.lhs.false: ; preds = %entry %cmp2 = icmp ugt i32 %0, -5 br i1 %cmp2, label %land.lhs.true3, label %if.end land.lhs.true3: ; preds = %lor.lhs.false %3 = load i32, ptr @b, align 4 %4 = load i32, ptr @d, align 4 %cmp4 = icmp eq i32 %3, %4 br i1 %cmp4, label %return, label %if.end if.end: ; preds = %land.lhs.true3, %lor.lhs.false, %land.lhs.true br label %return return: ; preds = %if.end, %land.lhs.true3, %land.lhs.true %retval.0 = phi i32 [ 0, %if.end ], [ 1, %land.lhs.true3 ], [ 1, %land.lhs.true ] ret i32 %retval.0 } ; Yes, you can mix them too! ; (a < -5 && b == c) || (a u> -5 && b == d) define i32 @combine_ult_gt_n5() #0 { ; CHECK-LABEL: combine_ult_gt_n5: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: adrp x8, :got:a ; CHECK-NEXT: ldr x8, [x8, :got_lo12:a] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: cmn w8, #5 ; CHECK-NEXT: b.hs .LBB22_3 ; CHECK-NEXT: // %bb.1: // %land.lhs.true ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:c ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:c] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB22_6 ; CHECK-NEXT: // %bb.2: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB22_3: // %lor.lhs.false ; CHECK-NEXT: b.le .LBB22_6 ; CHECK-NEXT: // %bb.4: // %land.lhs.true3 ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: adrp x9, :got:d ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: ldr x9, [x9, :got_lo12:d] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB22_6 ; CHECK-NEXT: // %bb.5: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB22_6: // %if.end ; CHECK-NEXT: mov w0, wzr ; CHECK-NEXT: ret entry: %0 = load i32, ptr @a, align 4 %cmp = icmp ult i32 %0, -5 br i1 %cmp, label %land.lhs.true, label %lor.lhs.false land.lhs.true: ; preds = %entry %1 = load i32, ptr @b, align 4 %2 = load i32, ptr @c, align 4 %cmp1 = icmp eq i32 %1, %2 br i1 %cmp1, label %return, label %if.end lor.lhs.false: ; preds = %entry %cmp2 = icmp sgt i32 %0, -5 br i1 %cmp2, label %land.lhs.true3, label %if.end land.lhs.true3: ; preds = %lor.lhs.false %3 = load i32, ptr @b, align 4 %4 = load i32, ptr @d, align 4 %cmp4 = icmp eq i32 %3, %4 br i1 %cmp4, label %return, label %if.end if.end: ; preds = %land.lhs.true3, %lor.lhs.false, %land.lhs.true br label %return return: ; preds = %if.end, %land.lhs.true3, %land.lhs.true %retval.0 = phi i32 [ 0, %if.end ], [ 1, %land.lhs.true3 ], [ 1, %land.lhs.true ] ret i32 %retval.0 } ; Test in the following case, we don't hit 'cmp' and trigger a false positive ; cmp w19, #0 ; cinc w0, w19, gt ; ... ; fcmp d8, #0.0 ; b.gt .LBB0_5 define i32 @fcmpri_u(i32 %argc, ptr nocapture readonly %argv) #0 { ; CHECK-LABEL: fcmpri_u: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: cmp w0, #2 ; CHECK-NEXT: b.lo .LBB23_3 ; CHECK-NEXT: // %bb.1: // %land.lhs.true ; CHECK-NEXT: ldr x8, [x1, #8] ; CHECK-NEXT: cbz x8, .LBB23_3 ; CHECK-NEXT: // %bb.2: ; CHECK-NEXT: mov w0, #3 // =0x3 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB23_3: // %if.end ; CHECK-NEXT: str d8, [sp, #-32]! // 8-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 32 ; CHECK-NEXT: stp x30, x19, [sp, #16] // 16-byte Folded Spill ; CHECK-NEXT: .cfi_offset w19, -8 ; CHECK-NEXT: .cfi_offset w30, -16 ; CHECK-NEXT: .cfi_offset b8, -32 ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: bl zoo ; CHECK-NEXT: mov w19, w0 ; CHECK-NEXT: mov w0, #-1 // =0xffffffff ; CHECK-NEXT: bl yoo ; CHECK-NEXT: cmp w19, #0 ; CHECK-NEXT: mov w1, #2 // =0x2 ; CHECK-NEXT: fmov d8, d0 ; CHECK-NEXT: cinc w0, w19, ne ; CHECK-NEXT: bl xoo ; CHECK-NEXT: fmov d0, #-1.00000000 ; CHECK-NEXT: fcmp d8, #0.0 ; CHECK-NEXT: fmov d1, #-2.00000000 ; CHECK-NEXT: fadd d0, d8, d0 ; CHECK-NEXT: fcsel d0, d8, d0, gt ; CHECK-NEXT: bl woo ; CHECK-NEXT: ldp x30, x19, [sp, #16] // 16-byte Folded Reload ; CHECK-NEXT: mov w0, #4 // =0x4 ; CHECK-NEXT: ldr d8, [sp], #32 // 8-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w19 ; CHECK-NEXT: .cfi_restore w30 ; CHECK-NEXT: .cfi_restore b8 ; CHECK-NEXT: ret ; CHECK-LABEL-DAG: .LBB9_3 entry: %cmp = icmp ugt i32 %argc, 1 br i1 %cmp, label %land.lhs.true, label %if.end land.lhs.true: ; preds = %entry %arrayidx = getelementptr inbounds ptr, ptr %argv, i64 1 %0 = load ptr, ptr %arrayidx, align 8 %cmp1 = icmp eq ptr %0, null br i1 %cmp1, label %if.end, label %return if.end: ; preds = %land.lhs.true, %entry %call = call i32 @zoo(i32 1) %call2 = call double @yoo(i32 -1) %cmp4 = icmp ugt i32 %call, 0 %add = zext i1 %cmp4 to i32 %cond = add nuw i32 %add, %call %call7 = call i32 @xoo(i32 %cond, i32 2) %cmp9 = fcmp ogt double %call2, 0.000000e+00 br i1 %cmp9, label %cond.end14, label %cond.false12 cond.false12: ; preds = %if.end %sub = fadd fast double %call2, -1.000000e+00 br label %cond.end14 cond.end14: ; preds = %if.end, %cond.false12 %cond15 = phi double [ %sub, %cond.false12 ], [ %call2, %if.end ] %call16 = call i32 @woo(double %cond15, double -2.000000e+00) br label %return return: ; preds = %land.lhs.true, %cond.end14 %retval.0 = phi i32 [ 4, %cond.end14 ], [ 3, %land.lhs.true ] ret i32 %retval.0 } define void @cmp_shifted_unsigned(i32 %in, i32 %lhs, i32 %rhs) #0 { ; CHECK-LABEL: cmp_shifted_unsigned: ; CHECK: // %bb.0: // %common.ret ; CHECK-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill ; CHECK-NEXT: .cfi_def_cfa_offset 16 ; CHECK-NEXT: .cfi_offset w30, -16 ; CHECK-NEXT: mov w8, #42 // =0x2a ; CHECK-NEXT: cmp w0, #0 ; CHECK-NEXT: mov w9, #128 // =0x80 ; CHECK-NEXT: csinc w8, w8, wzr, ne ; CHECK-NEXT: cmp wzr, w0, lsr #13 ; CHECK-NEXT: csel w0, w9, w8, ne ; CHECK-NEXT: bl zoo ; CHECK-NEXT: ldr x30, [sp], #16 // 8-byte Folded Reload ; CHECK-NEXT: .cfi_def_cfa_offset 0 ; CHECK-NEXT: .cfi_restore w30 ; CHECK-NEXT: ret ; [...] %tst_low = icmp ugt i32 %in, 8191 br i1 %tst_low, label %true, label %false true: call i32 @zoo(i32 128) ret void false: %tst = icmp ugt i32 %in, 0 br i1 %tst, label %truer, label %falser truer: call i32 @zoo(i32 42) ret void falser: call i32 @zoo(i32 1) ret void } define i32 @combine_ugt_uge_sel(i64 %v, ptr %p) #0 { ; CHECK-LABEL: combine_ugt_uge_sel: ; CHECK: // %bb.0: // %entry ; CHECK-NEXT: adrp x8, :got:a ; CHECK-NEXT: ldr x8, [x8, :got_lo12:a] ; CHECK-NEXT: ldr w9, [x8] ; CHECK-NEXT: adrp x8, :got:b ; CHECK-NEXT: ldr x8, [x8, :got_lo12:b] ; CHECK-NEXT: cmp w9, #0 ; CHECK-NEXT: csel x10, x0, xzr, ne ; CHECK-NEXT: str x10, [x1] ; CHECK-NEXT: cbz w9, .LBB25_2 ; CHECK-NEXT: // %bb.1: // %lor.lhs.false ; CHECK-NEXT: cmp w9, #2 ; CHECK-NEXT: b.hs .LBB25_4 ; CHECK-NEXT: b .LBB25_6 ; CHECK-NEXT: .LBB25_2: // %land.lhs.true ; CHECK-NEXT: adrp x9, :got:c ; CHECK-NEXT: ldr x9, [x9, :got_lo12:c] ; CHECK-NEXT: ldr w10, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w10, w9 ; CHECK-NEXT: b.ne .LBB25_4 ; CHECK-NEXT: // %bb.3: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB25_4: // %land.lhs.true3 ; CHECK-NEXT: adrp x9, :got:d ; CHECK-NEXT: ldr x9, [x9, :got_lo12:d] ; CHECK-NEXT: ldr w8, [x8] ; CHECK-NEXT: ldr w9, [x9] ; CHECK-NEXT: cmp w8, w9 ; CHECK-NEXT: b.ne .LBB25_6 ; CHECK-NEXT: // %bb.5: ; CHECK-NEXT: mov w0, #1 // =0x1 ; CHECK-NEXT: ret ; CHECK-NEXT: .LBB25_6: // %if.end ; CHECK-NEXT: mov w0, wzr ; CHECK-NEXT: ret entry: %0 = load i32, ptr @a, align 4 %cmp = icmp ugt i32 %0, 0 %m = select i1 %cmp, i64 %v, i64 0 store i64 %m, ptr %p br i1 %cmp, label %lor.lhs.false, label %land.lhs.true land.lhs.true: ; preds = %entry %1 = load i32, ptr @b, align 4 %2 = load i32, ptr @c, align 4 %cmp1 = icmp eq i32 %1, %2 br i1 %cmp1, label %return, label %land.lhs.true3 lor.lhs.false: ; preds = %entry %cmp2 = icmp ugt i32 %0, 1 br i1 %cmp2, label %land.lhs.true3, label %if.end land.lhs.true3: ; preds = %lor.lhs.false, %land.lhs.true %3 = load i32, ptr @b, align 4 %4 = load i32, ptr @d, align 4 %cmp4 = icmp eq i32 %3, %4 br i1 %cmp4, label %return, label %if.end if.end: ; preds = %land.lhs.true3, %lor.lhs.false br label %return return: ; preds = %if.end, %land.lhs.true3, %land.lhs.true %retval.0 = phi i32 [ 0, %if.end ], [ 1, %land.lhs.true3 ], [ 1, %land.lhs.true ] ret i32 %retval.0 } declare i32 @zoo(i32) declare double @yoo(i32) declare i32 @xoo(i32, i32) declare i32 @woo(double, double) attributes #0 = { uwtable }