diff options
Diffstat (limited to 'llvm/test/Transforms/Util/MemorySSA/multi-edges.ll')
| -rw-r--r-- | llvm/test/Transforms/Util/MemorySSA/multi-edges.ll | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/llvm/test/Transforms/Util/MemorySSA/multi-edges.ll b/llvm/test/Transforms/Util/MemorySSA/multi-edges.ll new file mode 100644 index 00000000000..882a35ddf10 --- /dev/null +++ b/llvm/test/Transforms/Util/MemorySSA/multi-edges.ll @@ -0,0 +1,31 @@ +; RUN: opt -basicaa -print-memoryssa -verify-memoryssa -analyze < %s 2>&1 | FileCheck %s +; +; Makes sure we have a sane model if both successors of some block is the same +; block. + +define i32 @foo(i1 %a) { +entry: + %0 = alloca i32, align 4 +; CHECK: 1 = MemoryDef(liveOnEntry) +; CHECK-NEXT: store i32 4 + store i32 4, i32* %0 + br i1 %a, label %Loop.Body, label %Loop.End + +Loop.Body: +; CHECK: 4 = MemoryPhi({entry,1},{Loop.End,3}) +; CHECK-NEXT: 2 = MemoryDef(4) +; CHECK-NEXT: store i32 5 + store i32 5, i32* %0, align 4 + br i1 %a, label %Loop.End, label %Loop.End ; WhyDoWeEvenHaveThatLever.gif + +Loop.End: +; CHECK: 3 = MemoryPhi({entry,1},{Loop.Body,2},{Loop.Body,2}) +; CHECK-NEXT: MemoryUse(3) +; CHECK-NEXT: %1 = load + %1 = load i32, i32* %0, align 4 + %2 = icmp eq i32 5, %1 + br i1 %2, label %Ret, label %Loop.Body + +Ret: + ret i32 %1 +} |
