[llvm-commits] [llvm] r145888 - /llvm/trunk/lib/Target/X86/X86FrameLowering.cpp

[Bill Wendling]

Author: void
Date: Mon Dec  5 19:26:14 2011
New Revision: 145888

URL: http://llvm.org/viewvc/llvm-project?rev=145888&view=rev
Log:
The compact encoding of the registers are 3-bits each. Make sure we shift the
value over that much.

Modified:
    llvm/trunk/lib/Target/X86/X86FrameLowering.cpp

Modified: llvm/trunk/lib/Target/X86/X86FrameLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86FrameLowering.cpp?rev=145888&r1=145887&r2=145888&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86FrameLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86FrameLowering.cpp Mon Dec  5 19:26:14 2011
@@ -385,12 +385,14 @@
   };
   const unsigned *CURegs = (Is64Bit ? CU64BitRegs : CU32BitRegs);
 
-  uint32_t RenumRegs[6];
   for (unsigned i = 6 - RegCount; i < 6; ++i) {
     int CUReg = getCompactUnwindRegNum(CURegs, SavedRegs[i]);
     if (CUReg == -1) return ~0U;
     SavedRegs[i] = CUReg;
+  }
 
+  uint32_t RenumRegs[6];
+  for (unsigned i = 6 - RegCount; i < 6; ++i) {
     unsigned Countless = 0;
     for (unsigned j = 6 - RegCount; j < i; ++j)
       if (SavedRegs[j] < SavedRegs[i])
@@ -454,7 +456,7 @@
     int CURegNum = getCompactUnwindRegNum(CURegs, Reg);
     if (CURegNum == -1)
       return ~0U;
-    RegEnc |= (CURegNum & 0x7) << (5 - I);
+    RegEnc |= (CURegNum & 0x7) << ((5 - I) * 3);
   }
 
   assert((RegEnc & 0x7FFF) == RegEnc && "Invalid compact register encoding!");