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X86FloatingPoint: Add some static assert, cleanup; NFC

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llvm-svn: 304341
This commit is contained in:
Matthias Braun 2017-05-31 20:30:17 +00:00
parent 33ca08c433
commit c6bba91749
1 changed files with 6 additions and 2 deletions
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8
lib/Target/X86/X86FloatingPoint.cpp
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@ -126,9 +126,11 @@ namespace {
static unsigned calcLiveInMask(MachineBasicBlock *MBB) {
unsigned Mask = 0;
for (const auto &LI : MBB->liveins()) {
if (LI.PhysReg < X86::FP0 || LI.PhysReg > X86::FP6)
MCPhysReg Reg = LI.PhysReg;
static_assert(X86::FP7 - X86::FP0 == 7, "sequential FP regnumbers");
if (Reg < X86::FP0 || Reg > X86::FP6)
continue;
Mask |= 1 << (LI.PhysReg - X86::FP0);
Mask |= 1 << (Reg - X86::FP0);
}
return Mask;
}
@ -453,6 +455,7 @@ bool FPS::processBasicBlock(MachineFunction &MF, MachineBasicBlock &BB) {
unsigned Reg = DeadRegs[i];
// Check if Reg is live on the stack. An inline-asm register operand that
// is in the clobber list and marked dead might not be live on the stack.
static_assert(X86::FP7 - X86::FP0 == 7, "sequential FP regnumbers");
if (Reg >= X86::FP0 && Reg <= X86::FP6 && isLive(Reg-X86::FP0)) {
DEBUG(dbgs() << "Register FP#" << Reg-X86::FP0 << " is dead!\n");
freeStackSlotAfter(I, Reg-X86::FP0);
@ -506,6 +509,7 @@ void FPS::setupBlockStack() {
// Push the fixed live-in registers.
for (unsigned i = Bundle.FixCount; i > 0; --i) {
static_assert(X86::ST7 - X86::ST0 == 7, "sequential ST regnumbers");
MBB->addLiveIn(X86::ST0+i-1);
DEBUG(dbgs() << "Live-in st(" << (i-1) << "): %FP"
<< unsigned(Bundle.FixStack[i-1]) << '\n');