[llvm-commits] [llvm] r85476 - /llvm/trunk/lib/Target/ARM/ARMBaseRegisterInfo.cpp

[Jim Grosbach]

Author: grosbach
Date: Wed Oct 28 21:41:21 2009
New Revision: 85476

URL: http://llvm.org/viewvc/llvm-project?rev=85476&view=rev
Log:
To get more thorough testing from llc-beta nightly runs, do dynamic stack
realignment regardless of whether it's strictly necessary.


Modified:
    llvm/trunk/lib/Target/ARM/ARMBaseRegisterInfo.cpp

Modified: llvm/trunk/lib/Target/ARM/ARMBaseRegisterInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMBaseRegisterInfo.cpp?rev=85476&r1=85475&r2=85476&view=diff

==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMBaseRegisterInfo.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMBaseRegisterInfo.cpp Wed Oct 28 21:41:21 2009
@@ -467,7 +467,11 @@
 }
 
 static unsigned calculateMaxStackAlignment(const MachineFrameInfo *FFI) {
-  unsigned MaxAlign = 0;
+  // FIXME: For now, force at least 128-bit alignment. This will push the
+  // nightly tester harder for making sure things work correctly. When
+  // we're ready to enable this for real, this goes back to starting at zero.
+  unsigned MaxAlign = 16;
+//  unsigned MaxAlign = 0;
 
   for (int i = FFI->getObjectIndexBegin(),
          e = FFI->getObjectIndexEnd(); i != e; ++i) {
@@ -500,14 +504,15 @@
   if (!ARMDynamicStackAlign)
     return false;
 
+  // FIXME: To force more brutal testing, realign whether we need to or not.
+  // Change this to be more selective when we turn it on for real, of course.
   const MachineFrameInfo *MFI = MF.getFrameInfo();
   const ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
-  unsigned StackAlign = MF.getTarget().getFrameInfo()->getStackAlignment();
+//  unsigned StackAlign = MF.getTarget().getFrameInfo()->getStackAlignment();
   return (RealignStack &&
           !AFI->isThumb1OnlyFunction() &&
-          (MFI->getMaxAlignment() > StackAlign) &&
+//          (MFI->getMaxAlignment() > StackAlign) &&
           !MFI->hasVarSizedObjects());
-
 }
 
 bool ARMBaseRegisterInfo::cannotEliminateFrame(const MachineFunction &MF) const {