41 lines
1.8 KiB
LLVM
41 lines
1.8 KiB
LLVM
; RUN: opt -gvn -S < %s | FileCheck %s
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target datalayout = "E-m:e-i64:64-n32:64"
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target triple = "powerpc64-unknown-linux-gnu"
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;; Make sure we use correct bit shift based on storage size for
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;; loads reusing a load value.
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define i64 @test1({ i1, i8 }* %predA, { i1, i8 }* %predB) {
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; CHECK-LABEL: @test1
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; CHECK: [[V1:%.*]] = load i16, i16* %{{.*}}
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; CHECK: [[V2:%.*]] = lshr i16 [[V1]], 8
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; CHECK: trunc i16 [[V2]] to i1
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%valueLoadA.fca.0.gep = getelementptr inbounds { i1, i8 }, { i1, i8 }* %predA, i64 0, i32 0
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%valueLoadA.fca.0.load = load i1, i1* %valueLoadA.fca.0.gep, align 8
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%valueLoadB.fca.0.gep = getelementptr inbounds { i1, i8 }, { i1, i8 }* %predB, i64 0, i32 0
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%valueLoadB.fca.0.load = load i1, i1* %valueLoadB.fca.0.gep, align 8
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%isTrue = and i1 %valueLoadA.fca.0.load, %valueLoadB.fca.0.load
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%valueLoadA.fca.1.gep = getelementptr inbounds { i1, i8 }, { i1, i8 }* %predA, i64 0, i32 1
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%valueLoadA.fca.1.load = load i8, i8* %valueLoadA.fca.1.gep, align 1
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%isNotNullA = icmp ne i8 %valueLoadA.fca.1.load, 0
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%valueLoadB.fca.1.gep = getelementptr inbounds { i1, i8 }, { i1, i8 }* %predB, i64 0, i32 1
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%valueLoadB.fca.1.load = load i8, i8* %valueLoadB.fca.1.gep, align 1
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%isNotNullB = icmp ne i8 %valueLoadB.fca.1.load, 0
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%isNotNull = and i1 %isNotNullA, %isNotNullB
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%isTrueAndNotNull = and i1 %isTrue, %isNotNull
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%ret = zext i1 %isTrueAndNotNull to i64
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ret i64 %ret
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}
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;; And likewise for loads reusing a store value.
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define i1 @test2(i8 %V, i8* %P) {
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; CHECK-LABEL: @test2
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; CHECK-NOT: lshr
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store i8 %V, i8* %P
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%P2 = bitcast i8* %P to i1*
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%A = load i1, i1* %P2
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ret i1 %A
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}
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