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3b205175ea
present in the bottom of the CFG triangle, as the transformation isn't ever valuable if the branch can't be eliminated. Also, unify some heuristics between SimplifyCFG's multiple if-converters, for consistency. This fixes rdar://10627242. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147630 91177308-0d34-0410-b5e6-96231b3b80d8
39 lines
561 B
LLVM
39 lines
561 B
LLVM
; RUN: opt -S -simplifycfg < %s | FileCheck %s
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define i32 @test1(i32 %x) nounwind {
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%i = shl i32 %x, 1
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switch i32 %i, label %a [
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i32 21, label %b
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i32 24, label %c
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]
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a:
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ret i32 0
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b:
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ret i32 3
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c:
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ret i32 5
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; CHECK: @test1
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; CHECK: %cond = icmp eq i32 %i, 24
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; CHECK: %. = select i1 %cond, i32 5, i32 0
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; CHECK: ret i32 %.
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}
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define i32 @test2(i32 %x) nounwind {
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%i = shl i32 %x, 1
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switch i32 %i, label %a [
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i32 21, label %b
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i32 23, label %c
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]
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a:
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ret i32 0
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b:
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ret i32 3
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c:
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ret i32 5
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; CHECK: @test2
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; CHECK: ret i32 0
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}
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