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-rw-r--r--llvm/test/Analysis/MemorySSA/ptr-const-mem.ll23
1 files changed, 23 insertions, 0 deletions
diff --git a/llvm/test/Analysis/MemorySSA/ptr-const-mem.ll b/llvm/test/Analysis/MemorySSA/ptr-const-mem.ll
new file mode 100644
index 00000000000..a326d8d717a
--- /dev/null
+++ b/llvm/test/Analysis/MemorySSA/ptr-const-mem.ll
@@ -0,0 +1,23 @@
+; RUN: opt -basicaa -print-memoryssa -verify-memoryssa -analyze -memssa-check-limit=0 < %s 2>&1 | FileCheck %s
+; RUN: opt -aa-pipeline=basic-aa -passes='print<memoryssa>' -verify-memoryssa -disable-output -memssa-check-limit=0 < %s 2>&1 | FileCheck %s
+target datalayout = "e-p:32:32-p1:64:64-p2:64:64-p3:32:32-p4:64:64-p5:32:32-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-v2048:2048-n32:64"
+target triple = "amdgcn"
+
+@g4 = external unnamed_addr constant i8, align 1
+
+define signext i8 @cmp_constant(i8* %q, i8 %v) local_unnamed_addr {
+entry:
+
+ store i8 %v, i8* %q, align 1
+; CHECK: 1 = MemoryDef(liveOnEntry)
+; CHECK-NEXT: store i8 %v, i8* %q, align 1
+
+ %0 = load i8, i8* @g4, align 1
+; Make sure that this load is liveOnEntry just based on the fact that @g4 is
+; constant memory.
+; CHECK: MemoryUse(liveOnEntry)
+; CHECK-NEXT: load i8, i8* @g4, align 1
+
+ ret i8 %0
+}
+
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