[llvm-commits] [llvm] r108561 - /llvm/trunk/lib/Target/X86/X86FloatingPoint.cpp

[Jakob Stoklund Olesen]

Author: stoklund
Date: Fri Jul 16 17:00:33 2010
New Revision: 108561

URL: http://llvm.org/viewvc/llvm-project?rev=108561&view=rev
Log:
Keep valgrind quiet.

The isLive() method can read uninitialized memory, but it still gives correct
results.

Modified:
    llvm/trunk/lib/Target/X86/X86FloatingPoint.cpp

Modified: llvm/trunk/lib/Target/X86/X86FloatingPoint.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86FloatingPoint.cpp?rev=108561&r1=108560&r2=108561&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86FloatingPoint.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86FloatingPoint.cpp Fri Jul 16 17:00:33 2010
@@ -50,7 +50,12 @@
 namespace {
   struct FPS : public MachineFunctionPass {
     static char ID;
-    FPS() : MachineFunctionPass(&ID) {}
+    FPS() : MachineFunctionPass(&ID) {
+      // This is really only to keep valgrind quiet.
+      // The logic in isLive() is too much for it.
+      memset(Stack, 0, sizeof(Stack));
+      memset(RegMap, 0, sizeof(RegMap));
+    }
 
     virtual void getAnalysisUsage(AnalysisUsage &AU) const {
       AU.setPreservesCFG();