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Diffstat (limited to 'llvm/test/Transforms/NewGVN/big-endian.ll')
| -rw-r--r-- | llvm/test/Transforms/NewGVN/big-endian.ll | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/llvm/test/Transforms/NewGVN/big-endian.ll b/llvm/test/Transforms/NewGVN/big-endian.ll new file mode 100644 index 00000000000..46b336b2e66 --- /dev/null +++ b/llvm/test/Transforms/NewGVN/big-endian.ll @@ -0,0 +1,40 @@ +; RUN: opt -newgvn -S < %s | FileCheck %s + +target datalayout = "E-m:e-i64:64-n32:64" +target triple = "powerpc64-unknown-linux-gnu" + +;; Make sure we use correct bit shift based on storage size for +;; loads reusing a load value. +define i64 @test1({ i1, i8 }* %predA, { i1, i8 }* %predB) { +; CHECK-LABEL: @test1 +; CHECK-NOT: [[V1:%.*]] = load i16, i16* %{{.*}} +; CHECK-NOT: [[V2:%.*]] = lshr i16 [[V1]], 8 +; CHECK-NOT: trunc i16 [[V2]] to i1 + + %valueLoadA.fca.0.gep = getelementptr inbounds { i1, i8 }, { i1, i8 }* %predA, i64 0, i32 0 + %valueLoadA.fca.0.load = load i1, i1* %valueLoadA.fca.0.gep, align 8 + %valueLoadB.fca.0.gep = getelementptr inbounds { i1, i8 }, { i1, i8 }* %predB, i64 0, i32 0 + %valueLoadB.fca.0.load = load i1, i1* %valueLoadB.fca.0.gep, align 8 + %isTrue = and i1 %valueLoadA.fca.0.load, %valueLoadB.fca.0.load + %valueLoadA.fca.1.gep = getelementptr inbounds { i1, i8 }, { i1, i8 }* %predA, i64 0, i32 1 + %valueLoadA.fca.1.load = load i8, i8* %valueLoadA.fca.1.gep, align 1 + %isNotNullA = icmp ne i8 %valueLoadA.fca.1.load, 0 + %valueLoadB.fca.1.gep = getelementptr inbounds { i1, i8 }, { i1, i8 }* %predB, i64 0, i32 1 + %valueLoadB.fca.1.load = load i8, i8* %valueLoadB.fca.1.gep, align 1 + %isNotNullB = icmp ne i8 %valueLoadB.fca.1.load, 0 + %isNotNull = and i1 %isNotNullA, %isNotNullB + %isTrueAndNotNull = and i1 %isTrue, %isNotNull + %ret = zext i1 %isTrueAndNotNull to i64 + ret i64 %ret +} + +;; And likewise for loads reusing a store value. +define i1 @test2(i8 %V, i8* %P) { +; CHECK-LABEL: @test2 +; CHECK-NOT: lshr + store i8 %V, i8* %P + %P2 = bitcast i8* %P to i1* + %A = load i1, i1* %P2 + ret i1 %A +} + |
