derek.holloway
7502bf64a4
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95 lines
2.5 KiB
LLVM
95 lines
2.5 KiB
LLVM
; RUN: llc -mtriple=aarch64 -verify-machineinstrs < %s | FileCheck --check-prefix=CHECK --check-prefix=OPT %s
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; RUN: llc -mtriple=aarch64 -verify-machineinstrs -O0 -fast-isel=0 -global-isel=false < %s | FileCheck --check-prefix=CHECK --check-prefix=NOOPT %s
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declare void @foo()
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; Check that the inverted or doesn't inhibit the splitting of the
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; complex conditional into three branch instructions.
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; CHECK-LABEL: test_and_not:
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; CHECK: cbz w0, [[L:\.LBB[0-9_]+]]
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; OPT: cmp w1, #2
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; NOOPT: subs w{{[0-9]+}}, w{{[0-9]+}}, #2
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; CHECK: b.lo [[L]]
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; OPT: cmp w2, #2
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; NOOPT: subs w{{[0-9]+}}, w{{[0-9]+}}, #2
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; CHECK: b.hi [[L]]
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define void @test_and_not(i32 %a, i32 %b, i32 %c) {
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bb1:
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%cmp1 = icmp ult i32 %a, 1
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%cmp2 = icmp ult i32 %b, 2
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%cmp3 = icmp ult i32 %c, 3
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%or = or i1 %cmp1, %cmp2
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%not.or = xor i1 %or, -1
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%and = and i1 %not.or, %cmp3
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br i1 %and, label %bb2, label %bb3
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bb2:
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ret void
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bb3:
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call void @foo()
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ret void
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}
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; Check that non-canonicalized xor not is handled correctly by FindMergedConditions.
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; CHECK-LABEL: test_and_not2:
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; CHECK: cbz w0, [[L:\.LBB[0-9_]+]]
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; OPT: cmp w1, #2
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; NOOPT: subs w{{[0-9]+}}, w{{[0-9]+}}, #2
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; CHECK: b.lo [[L]]
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; OPT: cmp w2, #2
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; NOOPT: subs w{{[0-9]+}}, w{{[0-9]+}}, #2
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; CHECK: b.hi [[L]]
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define void @test_and_not2(i32 %a, i32 %b, i32 %c) {
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bb1:
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%cmp1 = icmp ult i32 %a, 1
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%cmp2 = icmp ult i32 %b, 2
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%cmp3 = icmp ult i32 %c, 3
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%or = or i1 %cmp1, %cmp2
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%not.or = xor i1 -1, %or
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%and = and i1 %not.or, %cmp3
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br i1 %and, label %bb2, label %bb3
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bb2:
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ret void
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bb3:
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call void @foo()
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ret void
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}
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; Check that cmps in different blocks are handled correctly by FindMergedConditions.
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; CHECK-LABEL: test_cmp_other_block:
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; OPT: cmp w{{[0-9]+}}, #0
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; OPT: b.gt [[L:\.LBB[0-9_]+]]
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; OPT: tbz w1, #0, [[L]]
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;
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; NOOPT: str w1, [sp, #[[SLOT2:[0-9]+]]]
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; NOOPT: subs w{{[0-9]+}}, w{{[0-9]+}}, #0
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; NOOPT: cset [[R1:w[0-9]+]], gt
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; NOOPT: str [[R1]], [sp, #[[SLOT1:[0-9]+]]]
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; NOOPT: b .LBB
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; NOOPT: ldr [[R2:w[0-9]+]], [sp, #[[SLOT1]]]
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; NOOPT: tbnz [[R2]], #0, [[L:\.LBB[0-9_]+]]
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; NOOPT: ldr [[R3:w[0-9]+]], [sp, #[[SLOT2]]]
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; NOOPT: tbz [[R3]], #0, [[L]]
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define void @test_cmp_other_block(ptr %p, i1 %c) {
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entry:
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%l = load i32, ptr %p
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%cmp = icmp sgt i32 %l, 0
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br label %bb1
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bb1:
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%cmp.i = xor i1 %cmp, true
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%or.cond1.i = and i1 %cmp.i, %c
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br i1 %or.cond1.i, label %bb2, label %bb3
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bb2:
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ret void
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bb3:
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call void @foo()
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ret void
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}
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