[llvm-commits] [llvm] r104330 - /llvm/trunk/lib/Target/X86/X86FloatingPointRegKill.cpp
Chris Lattner
sabre at nondot.org
Fri May 21 11:01:24 PDT 2010
Author: lattner
Date: Fri May 21 13:01:24 2010
New Revision: 104330
URL: http://llvm.org/viewvc/llvm-project?rev=104330&view=rev
Log:
use continue to reduce nesting.
Modified:
llvm/trunk/lib/Target/X86/X86FloatingPointRegKill.cpp
Modified: llvm/trunk/lib/Target/X86/X86FloatingPointRegKill.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86FloatingPointRegKill.cpp?rev=104330&r1=104329&r2=104330&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86FloatingPointRegKill.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86FloatingPointRegKill.cpp Fri May 21 13:01:24 2010
@@ -57,22 +57,25 @@
/// stack code, and thus needs an FP_REG_KILL.
static bool ContainsFPStackCode(MachineBasicBlock *MBB, unsigned SSELevel,
MachineRegisterInfo &MRI) {
-
+ // Scan the block, looking for instructions that define fp stack vregs.
for (MachineBasicBlock::iterator I = MBB->begin(), E = MBB->end();
I != E; ++I) {
- if (I->getNumOperands() != 0 && I->getOperand(0).isReg()) {
- for (unsigned op = 0, e = I->getNumOperands(); op != e; ++op) {
- if (I->getOperand(op).isReg() && I->getOperand(op).isDef() &&
- TargetRegisterInfo::isVirtualRegister(I->getOperand(op).getReg())) {
- const TargetRegisterClass *RegClass =
- MRI.getRegClass(I->getOperand(op).getReg());
-
- if (RegClass == X86::RFP32RegisterClass ||
- RegClass == X86::RFP64RegisterClass ||
- RegClass == X86::RFP80RegisterClass)
- return true;
- }
- }
+ if (I->getNumOperands() == 0 || !I->getOperand(0).isReg())
+ continue;
+
+ for (unsigned op = 0, e = I->getNumOperands(); op != e; ++op) {
+ if (!I->getOperand(op).isReg() || !I->getOperand(op).isDef() ||
+ !TargetRegisterInfo::isVirtualRegister(I->getOperand(op).getReg()))
+ continue;
+
+ const TargetRegisterClass *RegClass =
+ MRI.getRegClass(I->getOperand(op).getReg());
+
+ switch (RegClass->getID())
+ case X86::RFP32RegClassID:
+ case X86::RFP64RegClassID:
+ case X86::RFP80RegClassID:
+ return true;
}
}
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