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Take advantage of the register enums being in order to remove a couple static tables. 

llvm-svn: 187182
This commit is contained in:
Craig Topper 2013-07-26 02:02:47 +00:00
parent 778d387684
commit 0f7807375a
1 changed files with 4 additions and 18 deletions
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22
llvm/lib/Target/X86/X86RegisterInfo.cpp
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@ -354,14 +354,8 @@ BitVector X86RegisterInfo::getReservedRegs(const MachineFunction &MF) const {
Reserved.set(X86::GS);
// Mark the floating point stack registers as reserved.
Reserved.set(X86::ST0);
Reserved.set(X86::ST1);
Reserved.set(X86::ST2);
Reserved.set(X86::ST3);
Reserved.set(X86::ST4);
Reserved.set(X86::ST5);
Reserved.set(X86::ST6);
Reserved.set(X86::ST7);
for (unsigned n = 0; n != 8; ++n)
Reserved.set(X86::ST0 + n);
// Reserve the registers that only exist in 64-bit mode.
if (!Is64Bit) {
@ -374,19 +368,11 @@ BitVector X86RegisterInfo::getReservedRegs(const MachineFunction &MF) const {
for (unsigned n = 0; n != 8; ++n) {
// R8, R9, ...
static const uint16_t GPR64[] = {
X86::R8, X86::R9, X86::R10, X86::R11,
X86::R12, X86::R13, X86::R14, X86::R15
};
for (MCRegAliasIterator AI(GPR64[n], this, true); AI.isValid(); ++AI)
for (MCRegAliasIterator AI(X86::R8 + n, this, true); AI.isValid(); ++AI)
Reserved.set(*AI);
// XMM8, XMM9, ...
static const uint16_t XMMReg[] = {
X86::XMM8, X86::XMM9, X86::XMM10, X86::XMM11,
X86::XMM12, X86::XMM13, X86::XMM14, X86::XMM15
};
for (MCRegAliasIterator AI(XMMReg[n], this, true); AI.isValid(); ++AI)
for (MCRegAliasIterator AI(X86::XMM8 + n, this, true); AI.isValid(); ++AI)
Reserved.set(*AI);
}
}