RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-23 19:23:23 +01:00
Code Issues Projects Releases Wiki Activity

To help readability of mightUseCTR pull out the inline asm handling support into a function.

Browse Source 
llvm-svn: 306762
This commit is contained in:
Eric Christopher 2017-06-29 23:28:47 +00:00
parent d3300ec378
commit 161c1ef482
1 changed files with 17 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
lib/Target/PowerPC/PPCCTRLoops.cpp
View File

@ -223,21 +223,28 @@ static bool memAddrUsesCTR(const PPCTargetMachine &TM, const Value *MemAddr) {
return Model == TLSModel::GeneralDynamic || Model == TLSModel::LocalDynamic;
}
// Loop through the inline asm constraints and look for something that clobbers
// ctr.
static bool asmClobbersCTR(InlineAsm *IA) {
InlineAsm::ConstraintInfoVector CIV = IA->ParseConstraints();
for (unsigned i = 0, ie = CIV.size(); i < ie; ++i) {
InlineAsm::ConstraintInfo &C = CIV[i];
if (C.Type != InlineAsm::isInput)
for (unsigned j = 0, je = C.Codes.size(); j < je; ++j)
if (StringRef(C.Codes[j]).equals_lower("{ctr}"))
return true;
}
return false;
}
bool PPCCTRLoops::mightUseCTR(BasicBlock *BB) {
for (BasicBlock::iterator J = BB->begin(), JE = BB->end();
J != JE; ++J) {
if (CallInst *CI = dyn_cast<CallInst>(J)) {
// Inline ASM is okay, unless it clobbers the ctr register.
if (InlineAsm *IA = dyn_cast<InlineAsm>(CI->getCalledValue())) {
// Inline ASM is okay, unless it clobbers the ctr register.
InlineAsm::ConstraintInfoVector CIV = IA->ParseConstraints();
for (unsigned i = 0, ie = CIV.size(); i < ie; ++i) {
InlineAsm::ConstraintInfo &C = CIV[i];
if (C.Type != InlineAsm::isInput)
for (unsigned j = 0, je = C.Codes.size(); j < je; ++j)
if (StringRef(C.Codes[j]).equals_lower("{ctr}"))
return true;
}
if (asmClobbersCTR(IA))
return true;
continue;
}