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The compact encoding of the registers are 3-bits each. Make sure we shift the 

value over that much.

llvm-svn: 145888
This commit is contained in:
Bill Wendling 2011-12-06 01:26:14 +00:00
parent a89c5ac4a6
commit f7cef7ecad
1 changed files with 4 additions and 2 deletions
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6
llvm/lib/Target/X86/X86FrameLowering.cpp
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@ -385,12 +385,14 @@ static uint32_t encodeCompactUnwindRegistersWithoutFrame(unsigned SavedRegs[6],
};
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 @@ static uint32_t encodeCompactUnwindRegistersWithFrame(unsigned SavedRegs[6],
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!");