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Remove two runs of the passes in AddSSAPasses.

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I measure around a 10% reduction in compile times of release no-assert
builds of the stdlib and StdlibUnitTest.

For release + debug-swift builds, I see 20% reduction in stdlib compile
time.

I saw no reproducible regressions in the benchmarks, and a few
improvements.

There is a small (0.1%) reduction in the libswiftCore.dylib size.

Being able to remove these is a consequence of the reordering that
happened in e50daa6.
This commit is contained in:
Mark Lacey
2016-02-24 20:35:38 -08:00
parent 54d91c91da
commit b00dcbebbf
1 changed files with 0 additions and 2 deletions
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2
lib/SILOptimizer/PassManager/Passes.cpp
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@@ -274,7 +274,6 @@ void swift::runSILOptimizationPasses(SILModule &Module) {
PM.setStageName("HighLevel"); PM.setStageName("HighLevel");
AddSSAPasses(PM, OptimizationLevelKind::HighLevel); AddSSAPasses(PM, OptimizationLevelKind::HighLevel);
PM.runOneIteration(); PM.runOneIteration();
PM.runOneIteration();
PM.resetAndRemoveTransformations(); PM.resetAndRemoveTransformations();
PM.setStageName("EarlyLoopOpt"); PM.setStageName("EarlyLoopOpt");
@@ -294,7 +293,6 @@ void swift::runSILOptimizationPasses(SILModule &Module) {
PM.setStageName("MidLevel"); PM.setStageName("MidLevel");
AddSSAPasses(PM, OptimizationLevelKind::MidLevel); AddSSAPasses(PM, OptimizationLevelKind::MidLevel);
PM.runOneIteration(); PM.runOneIteration();
PM.runOneIteration();
PM.resetAndRemoveTransformations(); PM.resetAndRemoveTransformations();
// Perform lowering optimizations. // Perform lowering optimizations.