[llvm] r242356 - Add a test for r242281 from an old patch of mine.

[Sean Silva]

Author: silvas
Date: Wed Jul 15 18:23:02 2015
New Revision: 242356

URL: http://llvm.org/viewvc/llvm-project?rev=242356&view=rev
Log:
Add a test for r242281 from an old patch of mine.

This isn't thorough, but should serve as a sanity check.

Added:
    llvm/trunk/test/Analysis/GlobalsModRef/atomic-instrs.ll

Added: llvm/trunk/test/Analysis/GlobalsModRef/atomic-instrs.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Analysis/GlobalsModRef/atomic-instrs.ll?rev=242356&view=auto
==============================================================================
--- llvm/trunk/test/Analysis/GlobalsModRef/atomic-instrs.ll (added)
+++ llvm/trunk/test/Analysis/GlobalsModRef/atomic-instrs.ll Wed Jul 15 18:23:02 2015
@@ -0,0 +1,37 @@
+; RUN: opt < %s -globalsmodref-aa -gvn -S | FileCheck %s
+
+ at X = internal global i32 4
+
+define i32 @test_cmpxchg(i32* %P) {
+; CHECK-LABEL: @test_cmpxchg
+; CHECK-NEXT: store i32 12, i32* @X
+; CHECK-NEXT: call void @modrefX_cmpxchg()
+; CHECK-NEXT: %V = load i32, i32* @X
+; CHECK-NEXT: ret i32 %V
+  store i32 12, i32* @X
+  call void @modrefX_cmpxchg()
+  %V = load i32, i32* @X
+  ret i32 %V
+}
+
+define void @modrefX_cmpxchg() {
+  %1 = cmpxchg i32* @X, i32 0, i32 -1 monotonic monotonic
+  ret void
+}
+
+define i32 @test_atomicrmw(i32* %P) {
+; CHECK-LABEL: @test_atomicrmw
+; CHECK-NEXT: store i32 12, i32* @X
+; CHECK-NEXT: call void @modrefXatomicrmw()
+; CHECK-NEXT: %V = load i32, i32* @X
+; CHECK-NEXT: ret i32 %V
+  store i32 12, i32* @X
+  call void @modrefXatomicrmw()
+  %V = load i32, i32* @X
+  ret i32 %V
+}
+
+define void @modrefXatomicrmw() {
+  %1 = atomicrmw add i32* @X, i32 1 acquire
+  ret void
+}