[llvm-commits] [llvm] r50432 - in /llvm/branches/Apple/Tak: lib/Transforms/Scalar/InstructionCombining.cpp test/Transforms/InstCombine/2008-04-28-VolatileStore.ll

[Bill Wendling]

Author: void
Date: Tue Apr 29 12:53:49 2008
New Revision: 50432

URL: http://llvm.org/viewvc/llvm-project?rev=50432&view=rev
Log:
Ported r50390 to Tak.

Added:
    llvm/branches/Apple/Tak/test/Transforms/InstCombine/2008-04-28-VolatileStore.ll
Modified:
    llvm/branches/Apple/Tak/lib/Transforms/Scalar/InstructionCombining.cpp

Modified: llvm/branches/Apple/Tak/lib/Transforms/Scalar/InstructionCombining.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/Apple/Tak/lib/Transforms/Scalar/InstructionCombining.cpp?rev=50432&r1=50431&r2=50432&view=diff

==============================================================================
--- llvm/branches/Apple/Tak/lib/Transforms/Scalar/InstructionCombining.cpp (original)
+++ llvm/branches/Apple/Tak/lib/Transforms/Scalar/InstructionCombining.cpp Tue Apr 29 12:53:49 2008
@@ -10256,7 +10256,7 @@
   
   // If the RHS is an alloca with a single use, zapify the store, making the
   // alloca dead.
-  if (Ptr->hasOneUse()) {
+  if (Ptr->hasOneUse() && !SI.isVolatile()) {
     if (isa<AllocaInst>(Ptr)) {
       EraseInstFromFunction(SI);
       ++NumCombined;

Added: llvm/branches/Apple/Tak/test/Transforms/InstCombine/2008-04-28-VolatileStore.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/branches/Apple/Tak/test/Transforms/InstCombine/2008-04-28-VolatileStore.ll?rev=50432&view=auto

==============================================================================
--- llvm/branches/Apple/Tak/test/Transforms/InstCombine/2008-04-28-VolatileStore.ll (added)
+++ llvm/branches/Apple/Tak/test/Transforms/InstCombine/2008-04-28-VolatileStore.ll Tue Apr 29 12:53:49 2008
@@ -0,0 +1,8 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {volatile store}
+
+define void @test() {
+	%votf = alloca <4 x float>		; <<4 x float>*> [#uses=1]
+	volatile store <4 x float> zeroinitializer, <4 x float>* %votf, align 16
+	ret void
+}
+