derek.holloway
7502bf64a4
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161 lines
7.6 KiB
LLVM
161 lines
7.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=loop-unroll,simplifycfg,instcombine,simplifycfg -switch-range-to-icmp -S -mtriple arm-none-eabi -mcpu=cortex-m7 %s | FileCheck %s
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; This test is meant to check that this loop is unrolled into three iterations.
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define void @test(ptr %x, i32 %n) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[SUB:%.*]] = add nsw i32 [[N:%.*]], -1
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; CHECK-NEXT: [[REM:%.*]] = srem i32 [[SUB]], 4
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; CHECK-NEXT: [[CMP7:%.*]] = icmp sgt i32 [[REM]], 0
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; CHECK-NEXT: br i1 [[CMP7]], label [[WHILE_BODY:%.*]], label [[WHILE_END:%.*]]
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; CHECK: while.body:
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; CHECK-NEXT: [[TMP0:%.*]] = load i32, ptr [[X:%.*]], align 4
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; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[TMP0]], 10
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; CHECK-NEXT: br i1 [[CMP1]], label [[IF_THEN:%.*]], label [[IF_END:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: store i32 0, ptr [[X]], align 4
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; CHECK-NEXT: br label [[IF_END]]
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; CHECK: if.end:
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; CHECK-NEXT: [[INCDEC_PTR:%.*]] = getelementptr inbounds nuw i8, ptr [[X]], i32 4
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; CHECK-NEXT: [[CMP_NOT:%.*]] = icmp eq i32 [[REM]], 1
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; CHECK-NEXT: br i1 [[CMP_NOT]], label [[WHILE_END]], label [[WHILE_BODY_1:%.*]]
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; CHECK: while.body.1:
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; CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[INCDEC_PTR]], align 4
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; CHECK-NEXT: [[CMP1_1:%.*]] = icmp slt i32 [[TMP1]], 10
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; CHECK-NEXT: br i1 [[CMP1_1]], label [[IF_THEN_1:%.*]], label [[IF_END_1:%.*]]
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; CHECK: if.then.1:
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; CHECK-NEXT: store i32 0, ptr [[INCDEC_PTR]], align 4
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; CHECK-NEXT: br label [[IF_END_1]]
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; CHECK: if.end.1:
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; CHECK-NEXT: [[INCDEC_PTR_1:%.*]] = getelementptr inbounds nuw i8, ptr [[X]], i32 8
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; CHECK-NEXT: [[CMP_1:%.*]] = icmp sgt i32 [[REM]], 2
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; CHECK-NEXT: br i1 [[CMP_1]], label [[WHILE_BODY_2:%.*]], label [[WHILE_END]]
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; CHECK: while.body.2:
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; CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[INCDEC_PTR_1]], align 4
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; CHECK-NEXT: [[CMP1_2:%.*]] = icmp slt i32 [[TMP2]], 10
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; CHECK-NEXT: br i1 [[CMP1_2]], label [[IF_THEN_2:%.*]], label [[WHILE_END]]
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; CHECK: if.then.2:
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; CHECK-NEXT: store i32 0, ptr [[INCDEC_PTR_1]], align 4
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; CHECK-NEXT: br label [[WHILE_END]]
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; CHECK: while.end:
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; CHECK-NEXT: ret void
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;
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entry:
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%sub = add nsw i32 %n, -1
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%rem = srem i32 %sub, 4
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%cmp7 = icmp sgt i32 %rem, 0
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br i1 %cmp7, label %while.body, label %while.end
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while.body: ; preds = %entry, %if.end
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%x.addr.09 = phi ptr [ %incdec.ptr, %if.end ], [ %x, %entry ]
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%n.addr.08 = phi i32 [ %dec, %if.end ], [ %rem, %entry ]
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%0 = load i32, ptr %x.addr.09, align 4
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%cmp1 = icmp slt i32 %0, 10
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br i1 %cmp1, label %if.then, label %if.end
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if.then: ; preds = %while.body
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store i32 0, ptr %x.addr.09, align 4
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br label %if.end
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if.end: ; preds = %if.then, %while.body
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%incdec.ptr = getelementptr inbounds i32, ptr %x.addr.09, i32 1
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%dec = add nsw i32 %n.addr.08, -1
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%cmp = icmp sgt i32 %dec, 0
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br i1 %cmp, label %while.body, label %while.end
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while.end: ; preds = %if.end, %entry
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ret void
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}
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; Larger test that is still fully unrolled, thanks in part to the constant data and the max upper bound.
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@data = internal constant [50 x i32] [i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 16, i32 17, i32 18, i32 19, i32 20, i32 21, i32 22, i32 23, i32 24, i32 25, i32 26, i32 27, i32 28, i32 29, i32 30, i32 31, i32 32, i32 33, i32 34, i32 35, i32 36, i32 37, i32 38, i32 39, i32 40, i32 41, i32 42, i32 43, i32 44, i32 45, i32 46, i32 47, i32 48, i32 49, i32 50], align 4
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define i32 @test2(i32 %l86) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[L86_OFF:%.*]] = add i32 [[L86:%.*]], -1
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; CHECK-NEXT: [[SWITCH:%.*]] = icmp ult i32 [[L86_OFF]], 24
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; CHECK-NEXT: [[OR_COND23_NOT:%.*]] = icmp ne i32 [[L86]], 25
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; CHECK-NEXT: [[SPEC_SELECT:%.*]] = zext i1 [[OR_COND23_NOT]] to i32
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; CHECK-NEXT: [[COMMON_RET_OP:%.*]] = select i1 [[SWITCH]], i32 0, i32 [[SPEC_SELECT]]
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; CHECK-NEXT: ret i32 [[COMMON_RET_OP]]
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;
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entry:
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br label %for.body.i.i
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for.body.i.i: ; preds = %for.body.i.i.preheader, %for.inc.i.3.i
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%i.0137.i.i = phi i32 [ %add.i.3.i, %for.inc.i.3.i ], [ 0, %entry ]
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%add.i.i = or i32 %i.0137.i.i, 1
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%arrayidx.i.i = getelementptr inbounds i32, ptr @data, i32 %add.i.i
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%l93 = load i32, ptr %arrayidx.i.i, align 4
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%cmp1.i.i = icmp sgt i32 %l93, %l86
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br i1 %cmp1.i.i, label %land.lhs.true.i.i, label %for.inc.i.i
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land.lhs.true.i.i: ; preds = %for.body.i.i
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%arrayidx2.i.i = getelementptr inbounds i32, ptr @data, i32 %i.0137.i.i
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%l94 = load i32, ptr %arrayidx2.i.i, align 4
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%cmp3.not.i.i = icmp sgt i32 %l94, %l86
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br i1 %cmp3.not.i.i, label %for.inc.i.i, label %for.end.i.if.end8.i_crit_edge.i.loopexit
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for.inc.i.i: ; preds = %land.lhs.true.i.i, %for.body.i.i
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%exitcond.not.i.i = icmp eq i32 %add.i.i, 25
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br i1 %exitcond.not.i.i, label %if.then6.i.i.loopexitsplit, label %for.body.i.1.i
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for.body.i.1.i: ; preds = %for.inc.i.i
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%add.i.1.i = or i32 %i.0137.i.i, 2
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%arrayidx.i.1.i = getelementptr inbounds i32, ptr @data, i32 %add.i.1.i
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%l345 = load i32, ptr %arrayidx.i.1.i, align 4
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%cmp1.i.1.i = icmp sgt i32 %l345, %l86
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br i1 %cmp1.i.1.i, label %land.lhs.true.i.1.i, label %for.inc.i.1.i
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land.lhs.true.i.1.i: ; preds = %for.body.i.1.i
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br i1 %cmp1.i.i, label %for.inc.i.1.i, label %for.end.i.i
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for.inc.i.1.i: ; preds = %land.lhs.true.i.1.i, %for.body.i.1.i
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%add.i.2.i = or i32 %i.0137.i.i, 3
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%arrayidx.i.2.i = getelementptr inbounds i32, ptr @data, i32 %add.i.2.i
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%l346 = load i32, ptr %arrayidx.i.2.i, align 4
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%cmp1.i.2.i = icmp sgt i32 %l346, %l86
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br i1 %cmp1.i.2.i, label %land.lhs.true.i.2.i, label %for.inc.i.2.i
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land.lhs.true.i.2.i: ; preds = %for.inc.i.1.i
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br i1 %cmp1.i.1.i, label %for.inc.i.2.i, label %for.end.i.if.end8.i_crit_edge.i.loopexit
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for.inc.i.2.i: ; preds = %land.lhs.true.i.2.i, %for.inc.i.1.i
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br label %for.body.i.3.i
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for.body.i.3.i: ; preds = %for.inc.i.2.i
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%add.i.3.i = add nuw nsw i32 %i.0137.i.i, 4
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%arrayidx.i.3.i = getelementptr inbounds i32, ptr @data, i32 %add.i.3.i
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%l347 = load i32, ptr %arrayidx.i.3.i, align 4
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%cmp1.i.3.i = icmp sgt i32 %l347, %l86
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br i1 %cmp1.i.3.i, label %land.lhs.true.i.3.i, label %for.inc.i.3.i
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land.lhs.true.i.3.i: ; preds = %for.body.i.3.i
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br i1 %cmp1.i.2.i, label %for.inc.i.3.i, label %for.end.i.i
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for.inc.i.3.i: ; preds = %land.lhs.true.i.3.i, %for.body.i.3.i
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br label %for.body.i.i
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for.end.i.if.end8.i_crit_edge.i.loopexit: ; preds = %land.lhs.true.i.i, %land.lhs.true.i.2.i
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%i.0.lcssa.i.i3.ph = phi i32 [ %i.0137.i.i, %land.lhs.true.i.i ], [ %add.i.1.i, %land.lhs.true.i.2.i ]
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br label %for.end.i.if.end8.i_crit_edge.i
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if.then6.i.i.loopexitsplit: ; preds = %for.inc.i.i
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br label %if.then6.i.i.loopexit
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for.end.i.i: ; preds = %land.lhs.true.i.3.i, %land.lhs.true.i.1.i
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%i.0.lcssa.i.i = phi i32 [ %add.i.i, %land.lhs.true.i.1.i ], [ %add.i.2.i, %land.lhs.true.i.3.i ]
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%cmp5.i.i = icmp eq i32 %i.0.lcssa.i.i, 25
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br i1 %cmp5.i.i, label %if.then6.i.i, label %for.end.i.if.end8.i_crit_edge.i
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for.end.i.if.end8.i_crit_edge.i:
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ret i32 0
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if.then6.i.i.loopexit:
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ret i32 1
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if.then6.i.i:
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ret i32 2
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}
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