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Adds an option to disable ARM ld/st optim pass

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Enabled by default, but it's useful when debugging with llc.

Patch by Ranjeet Singh.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233303 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Renato Golin 2015-03-26 18:38:04 +00:00
parent 387a89bb36
commit d6e2911a4f
1 changed files with 16 additions and 7 deletions
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17
lib/Target/ARM/ARMTargetMachine.cpp
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@ -37,6 +37,11 @@ EnableAtomicTidy("arm-atomic-cfg-tidy", cl::Hidden,
" to make use of cmpxchg flow-based information"),
cl::init(true));
static cl::opt<bool>
EnableARMLoadStoreOpt("arm-load-store-opt", cl::Hidden,
cl::desc("Enable ARM load/store optimization pass"),
cl::init(true));
extern "C" void LLVMInitializeARMTarget() {
// Register the target.
RegisterTargetMachine<ARMLETargetMachine> X(TheARMLETarget);
@ -348,18 +353,22 @@ bool ARMPassConfig::addInstSelector() {
}
void ARMPassConfig::addPreRegAlloc() {
if (getOptLevel() != CodeGenOpt::None)
addPass(createARMLoadStoreOptimizationPass(true));
if (getOptLevel() != CodeGenOpt::None)
if (getOptLevel() != CodeGenOpt::None) {
addPass(createMLxExpansionPass());
if (getOptLevel() != CodeGenOpt::None && !DisableA15SDOptimization) {
if (EnableARMLoadStoreOpt)
addPass(createARMLoadStoreOptimizationPass(/* pre-register alloc */ true));
if (!DisableA15SDOptimization)
addPass(createA15SDOptimizerPass());
}
}
void ARMPassConfig::addPreSched2() {
if (getOptLevel() != CodeGenOpt::None) {
if (EnableARMLoadStoreOpt)
addPass(createARMLoadStoreOptimizationPass());
addPass(createExecutionDependencyFixPass(&ARM::DPRRegClass));
}