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Diffstat (limited to 'test/Transforms/GVN/invariant-load.ll')
| -rw-r--r-- | test/Transforms/GVN/invariant-load.ll | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/test/Transforms/GVN/invariant-load.ll b/test/Transforms/GVN/invariant-load.ll new file mode 100644 index 0000000..80e2226 --- /dev/null +++ b/test/Transforms/GVN/invariant-load.ll @@ -0,0 +1,31 @@ +; Test if the !invariant.load metadata is maintained by GVN. +; RUN: opt -basicaa -gvn -S < %s | FileCheck %s + +define i32 @test1(i32* nocapture %p, i8* nocapture %q) { +; CHECK-LABEL: test1 +; CHECK: %x = load i32* %p, align 4, !invariant.load !0 +; CHECK-NOT: %y = load +entry: + %x = load i32* %p, align 4, !invariant.load !0 + %conv = trunc i32 %x to i8 + store i8 %conv, i8* %q, align 1 + %y = load i32* %p, align 4, !invariant.load !0 + %add = add i32 %y, 1 + ret i32 %add +} + +define i32 @test2(i32* nocapture %p, i8* nocapture %q) { +; CHECK-LABEL: test2 +; CHECK-NOT: !invariant.load +; CHECK-NOT: %y = load +entry: + %x = load i32* %p, align 4 + %conv = trunc i32 %x to i8 + store i8 %conv, i8* %q, align 1 + %y = load i32* %p, align 4, !invariant.load !0 + %add = add i32 %y, 1 + ret i32 %add +} + +!0 = metadata !{ } + |