RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2025-01-17 00:57:54 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

more simplifications and cleanup. :)

Browse Source 
llvm-svn: 77350
This commit is contained in:
Chris Lattner 2009-07-28 18:48:43 +00:00
parent aa8c94b051
commit 8972d46576
1 changed files with 17 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
lib/Target/ARM/ARMBaseRegisterInfo.cpp
View File

@ -464,24 +464,23 @@ static unsigned estimateStackSize(MachineFunction &MF, MachineFrameInfo *MFI) {
static unsigned estimateRSStackSizeLimit(MachineFunction &MF,
const ARMBaseInstrInfo &TII) {
unsigned Limit = (1 << 12) - 1;
for (MachineFunction::iterator BB = MF.begin(),E = MF.end();BB != E; ++BB) {
for (MachineBasicBlock::iterator I= BB->begin(); I != BB->end(); ++I) {
for (unsigned i = 0, e = I->getNumOperands(); i != e; ++i)
if (I->getOperand(i).isFI()) {
unsigned Opcode = I->getOpcode();
const TargetInstrDesc &Desc = TII.get(Opcode);
unsigned AddrMode = (Desc.TSFlags & ARMII::AddrModeMask);
if (AddrMode == ARMII::AddrMode3 ||
AddrMode == ARMII::AddrModeT2_i8) {
return (1 << 8) - 1;
} else if (AddrMode == ARMII::AddrMode5 ||
AddrMode == ARMII::AddrModeT2_i8s4) {
unsigned ThisLimit = ((1 << 8) - 1) * 4;
if (ThisLimit < Limit)
Limit = ThisLimit;
}
break; // At most one FI per instruction
}
for (MachineFunction::iterator BB = MF.begin(),E = MF.end(); BB != E; ++BB) {
for (MachineBasicBlock::iterator I = BB->begin(), E = BB->end();
I != E; ++I) {
for (unsigned i = 0, e = I->getNumOperands(); i != e; ++i) {
if (!I->getOperand(i).isFI()) continue;
const TargetInstrDesc &Desc = TII.get(I->getOpcode());
unsigned AddrMode = (Desc.TSFlags & ARMII::AddrModeMask);
if (AddrMode == ARMII::AddrMode3 ||
AddrMode == ARMII::AddrModeT2_i8)
return (1 << 8) - 1;
if (AddrMode == ARMII::AddrMode5 ||
AddrMode == ARMII::AddrModeT2_i8s4)
Limit = std::min(Limit, ((1U << 8) - 1) * 4);
break; // At most one FI per instruction
}
}
}