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Add indirect call promotion pass when PGO info is available. (#2156)

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This pass was apparently implicit in LLVM < 5.0. Fixes test PGO/indirect_calls.d with LLVM 5.0.
This commit is contained in:
Johan Engelen 2017-06-06 10:28:23 +02:00 • committed by Nicholas Wilson
parent 40de53d095
commit 058d574f6b
1 changed files with 12 additions and 2 deletions
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14
gen/optimizer.cpp
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@ -212,9 +212,11 @@ static void addThreadSanitizerPass(const PassManagerBuilder &Builder,
PM.add(createThreadSanitizerPass());
}
static void addInstrProfilingPass(legacy::PassManagerBase &mpm) {
// Adds PGO instrumentation generation and use passes.
static void addPGOPasses(legacy::PassManagerBase &mpm, unsigned optLevel) {
#if LDC_WITH_PGO
if (global.params.genInstrProf) {
// We are generating PGO instrumented code.
InstrProfOptions options;
options.NoRedZone = global.params.disableRedZone;
if (global.params.datafileInstrProf)
@ -223,6 +225,14 @@ static void addInstrProfilingPass(legacy::PassManagerBase &mpm) {
mpm.add(createInstrProfilingLegacyPass(options));
#else
mpm.add(createInstrProfilingPass(options));
#endif
} else if (global.params.datafileInstrProf) {
// We are generating code with PGO profile information available.
#if LDC_LLVM_VER >= 500
// Do indirect call promotion from -O1
if (optLevel > 0) {
mpm.add(createPGOIndirectCallPromotionLegacyPass());
}
#endif
}
#endif
@ -325,7 +335,7 @@ static void addOptimizationPasses(PassManagerBase &mpm,
builder.addExtension(PassManagerBuilder::EP_OptimizerLast,
addStripExternalsPass);
addInstrProfilingPass(mpm);
addPGOPasses(mpm, optLevel);
builder.populateFunctionPassManager(fpm);
builder.populateModulePassManager(mpm);