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Disable the load/store optimization pass for Thumb-1.

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Moritz's changes have improved codegen a lot, but further testing showed significant correctness problems. Disable by default until these have been worked out.

Patch by Moritz Roth!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210789 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
James Molloy
2014-06-12 15:18:33 +00:00
parent 1f4c755c2c
commit 5eba90a861
5 changed files with 13 additions and 7 deletions
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lib/Target/ARM/ARMTargetMachine.cpp
+7 -3
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@@ -265,7 +265,8 @@ bool ARMPassConfig::addInstSelector() {
}
bool ARMPassConfig::addPreRegAlloc() {
if (getOptLevel() != CodeGenOpt::None)
// FIXME: Temporarily disabling Thumb-1 pre-RA Load/Store optimization pass
if (getOptLevel() != CodeGenOpt::None && !getARMSubtarget().isThumb1Only())
addPass(createARMLoadStoreOptimizationPass(true));
if (getOptLevel() != CodeGenOpt::None && getARMSubtarget().isCortexA9())
addPass(createMLxExpansionPass());
@@ -280,8 +281,11 @@ bool ARMPassConfig::addPreRegAlloc() {
bool ARMPassConfig::addPreSched2() {
if (getOptLevel() != CodeGenOpt::None) {
addPass(createARMLoadStoreOptimizationPass());
printAndVerify("After ARM load / store optimizer");
// FIXME: Temporarily disabling Thumb-1 post-RA Load/Store optimization pass
if (!getARMSubtarget().isThumb1Only()) {
addPass(createARMLoadStoreOptimizationPass());
printAndVerify("After ARM load / store optimizer");
}
if (getARMSubtarget().hasNEON())
addPass(createExecutionDependencyFixPass(&ARM::DPRRegClass));