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Add bundle aware API for querying instruction properties and switch the code

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generator to it. For non-bundle instructions, these behave exactly the same
as the MC layer API.

For properties like mayLoad / mayStore, look into the bundle and if any of the
bundled instructions has the property it would return true.
For properties like isPredicable, only return true if *all* of the bundled
instructions have the property.
For properties like canFoldAsLoad, isCompare, conservatively return false for
bundles.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146026 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2011-12-07 07:15:52 +00:00
parent 5729c5848c
commit 5a96b3dad2
69 changed files with 596 additions and 354 deletions
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lib/Target/ARM/ARMLoadStoreOptimizer.cpp
+5 -7
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@@ -1472,19 +1472,18 @@ static bool IsSafeAndProfitableToMove(bool isLd, unsigned Base,
while (++I != E) {
if (I->isDebugValue() || MemOps.count(&*I))
continue;
const MCInstrDesc &MCID = I->getDesc();
if (MCID.isCall() || MCID.isTerminator() || I->hasUnmodeledSideEffects())
if (I->isCall() || I->isTerminator() || I->hasUnmodeledSideEffects())
return false;
if (isLd && MCID.mayStore())
if (isLd && I->mayStore())
return false;
if (!isLd) {
if (MCID.mayLoad())
if (I->mayLoad())
return false;
// It's not safe to move the first 'str' down.
// str r1, [r0]
// strh r5, [r0]
// str r4, [r0, #+4]
if (MCID.mayStore())
if (I->mayStore())
return false;
}
for (unsigned j = 0, NumOps = I->getNumOperands(); j != NumOps; ++j) {
@@ -1774,8 +1773,7 @@ ARMPreAllocLoadStoreOpt::RescheduleLoadStoreInstrs(MachineBasicBlock *MBB) {
while (MBBI != E) {
for (; MBBI != E; ++MBBI) {
MachineInstr *MI = MBBI;
const MCInstrDesc &MCID = MI->getDesc();
if (MCID.isCall() || MCID.isTerminator()) {
if (MI->isCall() || MI->isTerminator()) {
// Stop at barriers.
++MBBI;
break;