[llvm-commits] [llvm] r50155 - /llvm/trunk/lib/Target/X86/X86RegisterInfo.cpp

[Anton Korobeynikov]

Author: asl
Date: Wed Apr 23 13:16:43 2008
New Revision: 50155

URL: http://llvm.org/viewvc/llvm-project?rev=50155&view=rev
Log:
Disable stack realignment for functions with dynamic-sized alloca's

Modified:
    llvm/trunk/lib/Target/X86/X86RegisterInfo.cpp

Modified: llvm/trunk/lib/Target/X86/X86RegisterInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86RegisterInfo.cpp?rev=50155&r1=50154&r2=50155&view=diff

==============================================================================
--- llvm/trunk/lib/Target/X86/X86RegisterInfo.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86RegisterInfo.cpp Wed Apr 23 13:16:43 2008
@@ -267,7 +267,10 @@
 bool X86RegisterInfo::needsStackRealignment(const MachineFunction &MF) const {
   MachineFrameInfo *MFI = MF.getFrameInfo();;
 
-  return (MFI->getMaxAlignment() > StackAlign);
+  // FIXME: Currently we don't support stack realignment for functions with
+  // variable-sized allocas
+  return (MFI->getMaxAlignment() > StackAlign &&
+          !MFI->hasVarSizedObjects());
 }
 
 bool X86RegisterInfo::hasReservedCallFrame(MachineFunction &MF) const {