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33828bcb24
Also prevent the switch-to-icmp transform from creating identity adds, noticed by Marius Wachtler. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125056 91177308-0d34-0410-b5e6-96231b3b80d8
40 lines
801 B
LLVM
40 lines
801 B
LLVM
; RUN: opt -S -simplifycfg < %s | FileCheck %s
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define zeroext i1 @test1(i32 %x) nounwind readnone ssp noredzone {
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entry:
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switch i32 %x, label %lor.rhs [
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i32 2, label %lor.end
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i32 1, label %lor.end
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i32 3, label %lor.end
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]
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lor.rhs:
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br label %lor.end
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lor.end:
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%0 = phi i1 [ true, %entry ], [ false, %lor.rhs ], [ true, %entry ], [ true, %entry ]
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ret i1 %0
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; CHECK: @test1
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; CHECK: %x.off = add i32 %x, -1
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; CHECK: %switch = icmp ult i32 %x.off, 3
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}
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define zeroext i1 @test2(i32 %x) nounwind readnone ssp noredzone {
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entry:
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switch i32 %x, label %lor.rhs [
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i32 0, label %lor.end
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i32 1, label %lor.end
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]
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lor.rhs:
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br label %lor.end
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lor.end:
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%0 = phi i1 [ true, %entry ], [ false, %lor.rhs ], [ true, %entry ]
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ret i1 %0
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; CHECK: @test2
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; CHECK: %switch = icmp ult i32 %x, 2
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}
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