[llvm-commits] [llvm] r126457 - /llvm/trunk/lib/Target/ARM/ARMFrameLowering.cpp

[Evan Cheng]

Author: evancheng
Date: Thu Feb 24 18:24:46 2011
New Revision: 126457

URL: http://llvm.org/viewvc/llvm-project?rev=126457&view=rev
Log:
Each prologue may have multiple vpush instructions to store callee-saved
D registers since the vpush list may not have gaps. Make sure the stack
adjustment instruction isn't moved between them. Ditto for vpop in
epilogues.

Sorry, can't reduce a small test case.
rdar://9043312

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

Modified: llvm/trunk/lib/Target/ARM/ARMFrameLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMFrameLowering.cpp?rev=126457&r1=126456&r2=126457&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMFrameLowering.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMFrameLowering.cpp Thu Feb 24 18:24:46 2011
@@ -215,7 +215,13 @@
   AFI->setDPRCalleeSavedAreaOffset(DPRCSOffset);
 
   // Move past area 3.
-  if (DPRCSSize > 0) MBBI++;
+  if (DPRCSSize > 0) {
+    MBBI++;
+    // Since vpush register list cannot have gaps, there may be multiple vpush
+    // instructions in the epilogue.
+    while (MBBI->getOpcode() == ARM::VSTMDDB_UPD)
+      MBBI++;
+  }
 
   NumBytes = DPRCSOffset;
   if (NumBytes) {
@@ -370,7 +376,13 @@
       emitSPUpdate(isARM, MBB, MBBI, dl, TII, NumBytes);
 
     // Increment past our save areas.
-    if (AFI->getDPRCalleeSavedAreaSize()) MBBI++;
+    if (AFI->getDPRCalleeSavedAreaSize()) {
+      MBBI++;
+      // Since vpop register list cannot have gaps, there may be multiple vpop
+      // instructions in the epilogue.
+      while (MBBI->getOpcode() == ARM::VLDMDIA_UPD)
+        MBBI++;
+    }
     if (AFI->getGPRCalleeSavedArea2Size()) MBBI++;
     if (AFI->getGPRCalleeSavedArea1Size()) MBBI++;
   }