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d9a479e5a0
This allows the constant island pass to lower these branches to cbn?z instructions, resulting in a shorter instruction sequence. Differential Revision: http://reviews.llvm.org/D9183 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235638 91177308-0d34-0410-b5e6-96231b3b80d8
48 lines
662 B
LLVM
48 lines
662 B
LLVM
; RUN: llc -mtriple=thumbv7-unknown-linux %s -o - | FileCheck %s
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declare void @x()
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define void @f0(i32 %x) optsize {
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; CHECK-LABEL: f0:
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; CHECK: cbnz
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%p = icmp eq i32 %x, 0
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br i1 %p, label %t, label %f
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t:
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call void @x()
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br label %f
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f:
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ret void
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}
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define void @f1(i32 %x) optsize {
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; CHECK-LABEL: f1:
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; CHECK: cmp r0, #1
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; CHECK: it eq
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%p = icmp eq i32 %x, 1
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br i1 %p, label %t, label %f
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t:
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call void @x()
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br label %f
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f:
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ret void
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}
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define void @f2(i32 %x) {
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; CHECK-LABEL: f2:
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; CHECK: cmp r0, #0
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; CHECK: it eq
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%p = icmp eq i32 %x, 0
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br i1 %p, label %t, label %f
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t:
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call void @x()
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br label %f
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f:
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ret void
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}
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