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Simplify the code a bit.

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The compact unwind registers were defined in two different
places. It's better just to place them in the function that uses them
and specify that this is a 64-bit or 32-bit machine.

No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181529 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2013-05-09 18:21:45 +00:00
parent 95f885390b
commit 1f4b796b49
1 changed files with 10 additions and 19 deletions
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29
lib/Target/X86/X86FrameLowering.cpp
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@ -369,7 +369,14 @@ void X86FrameLowering::emitCalleeSavedFrameMoves(MachineFunction &MF,
/// getCompactUnwindRegNum - Get the compact unwind number for a given
/// register. The number corresponds to the enum lists in
/// compact_unwind_encoding.h.
static int getCompactUnwindRegNum(const uint16_t *CURegs, unsigned Reg) {
static int getCompactUnwindRegNum(unsigned Reg, bool is64Bit) {
static const uint16_t CU32BitRegs[] = {
X86::EBX, X86::ECX, X86::EDX, X86::EDI, X86::ESI, X86::EBP, 0
};
static const uint16_t CU64BitRegs[] = {
X86::RBX, X86::R12, X86::R13, X86::R14, X86::R15, X86::RBP, 0
};
const uint16_t *CURegs = is64Bit ? CU64BitRegs : CU32BitRegs;
for (int Idx = 1; *CURegs; ++CURegs, ++Idx)
if (*CURegs == Reg)
return Idx;
@ -398,16 +405,8 @@ encodeCompactUnwindRegistersWithoutFrame(unsigned SavedRegs[CU_NUM_SAVED_REGS],
// 4 3
// 5 3
//
static const uint16_t CU32BitRegs[] = {
X86::EBX, X86::ECX, X86::EDX, X86::EDI, X86::ESI, X86::EBP, 0
};
static const uint16_t CU64BitRegs[] = {
X86::RBX, X86::R12, X86::R13, X86::R14, X86::R15, X86::RBP, 0
};
const uint16_t *CURegs = (Is64Bit ? CU64BitRegs : CU32BitRegs);
for (unsigned i = 0; i != CU_NUM_SAVED_REGS; ++i) {
int CUReg = getCompactUnwindRegNum(CURegs, SavedRegs[i]);
int CUReg = getCompactUnwindRegNum(SavedRegs[i], Is64Bit);
if (CUReg == -1) return ~0U;
SavedRegs[i] = CUReg;
}
@ -466,14 +465,6 @@ encodeCompactUnwindRegistersWithoutFrame(unsigned SavedRegs[CU_NUM_SAVED_REGS],
static uint32_t
encodeCompactUnwindRegistersWithFrame(unsigned SavedRegs[CU_NUM_SAVED_REGS],
bool Is64Bit) {
static const uint16_t CU32BitRegs[] = {
X86::EBX, X86::ECX, X86::EDX, X86::EDI, X86::ESI, X86::EBP, 0
};
static const uint16_t CU64BitRegs[] = {
X86::RBX, X86::R12, X86::R13, X86::R14, X86::R15, X86::RBP, 0
};
const uint16_t *CURegs = (Is64Bit ? CU64BitRegs : CU32BitRegs);
// Encode the registers in the order they were saved, 3-bits per register. The
// registers are numbered from 1 to CU_NUM_SAVED_REGS.
uint32_t RegEnc = 0;
@ -481,7 +472,7 @@ encodeCompactUnwindRegistersWithFrame(unsigned SavedRegs[CU_NUM_SAVED_REGS],
unsigned Reg = SavedRegs[I];
if (Reg == 0) continue;
int CURegNum = getCompactUnwindRegNum(CURegs, Reg);
int CURegNum = getCompactUnwindRegNum(Reg, Is64Bit);
if (CURegNum == -1) return ~0U;
// Encode the 3-bit register number in order, skipping over 3-bits for each