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Diffstat (limited to 'llvm/test/Analysis/MemorySSA/assume.ll')
| -rw-r--r-- | llvm/test/Analysis/MemorySSA/assume.ll | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/llvm/test/Analysis/MemorySSA/assume.ll b/llvm/test/Analysis/MemorySSA/assume.ll new file mode 100644 index 00000000000..d771c78eb1c --- /dev/null +++ b/llvm/test/Analysis/MemorySSA/assume.ll @@ -0,0 +1,19 @@ +; RUN: opt -basicaa -memoryssa -analyze < %s 2>&1 | FileCheck %s +; RUN: opt -aa-pipeline=basic-aa -passes='print<memoryssa>,verify<memoryssa>' -disable-output < %s 2>&1 | FileCheck %s +; +; Ensures that assumes are treated as not reading or writing memory. + +declare void @llvm.assume(i1) + +define i32 @foo(i32* %a, i32* %b, i1 %c) { +; CHECK: 1 = MemoryDef(liveOnEntry) +; CHECK-NEXT: store i32 4 + store i32 4, i32* %a, align 4 +; CHECK-NOT: MemoryDef +; CHECK: call void @llvm.assume + call void @llvm.assume(i1 %c) +; CHECK: MemoryUse(1) +; CHECK-NEXT: %1 = load i32 + %1 = load i32, i32* %a, align 4 + ret i32 %1 +} |
