58 lines
1.0 KiB
LLVM
58 lines
1.0 KiB
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-LABEL: @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-LABEL: @test2(
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; CHECK: %switch = icmp ult i32 %x, 2
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}
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define i32 @test3(i1 %flag) {
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entry:
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switch i1 %flag, label %bad [
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i1 true, label %good
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i1 false, label %good
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]
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good:
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ret i32 0
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bad:
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ret i32 1
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; CHECK-LABEL: @test3(
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; CHECK: entry:
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; CHECK-NEXT: ret i32 0
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}
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