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Now that tailduplication does not bork SSA form, run mem2reg earlier in gccas.

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This tremendously improves the code generated by the LLVM optimizer, primarily
by making the inliner more aggressive.  For example, it improves the stepanov
benchmark from 55.56 mega-additions/sec to 98.04 Ma/s.  It also improves the
oopack/iterator benchmark from 338.3MFLOPS/s to 1103.4MFLOPS/s.  Less noteworthy,
it improves oopack/matrix from 573 -> 641 MFLOPS/s.

llvm-svn: 11053
This commit is contained in:
Chris Lattner 2004-02-01 07:24:53 +00:00
parent 824015593c
commit 15ea2aa0ff
1 changed files with 4 additions and 2 deletions
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6
tools/gccas/gccas.cpp
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@ -65,18 +65,20 @@ void AddConfiguredTransformationPasses(PassManager &PM) {
if (DisableOptimizations) return;
addPass(PM, createCFGSimplificationPass()); // Clean up disgusting code
addPass(PM, createRaiseAllocationsPass()); // call %malloc -> malloc inst
addPass(PM, createCFGSimplificationPass()); // Clean up disgusting code
addPass(PM, createPromoteMemoryToRegister()); // Kill useless allocas
addPass(PM, createGlobalDCEPass()); // Remove unused globals
addPass(PM, createIPConstantPropagationPass());// IP Constant Propagation
addPass(PM, createDeadArgEliminationPass()); // Dead argument elimination
addPass(PM, createInstructionCombiningPass()); // Clean up after IPCP & DAE
addPass(PM, createCFGSimplificationPass()); // Clean up after IPCP & DAE
addPass(PM, createPruneEHPass()); // Remove dead EH info
if (!DisableInline)
addPass(PM, createFunctionInliningPass()); // Inline small functions
addPass(PM, createInstructionCombiningPass()); // Cleanup code for raise
addPass(PM, createRaisePointerReferencesPass());// Recover type information
addPass(PM, createTailDuplicationPass()); // Simplify cfg by copying code
addPass(PM, createCFGSimplificationPass()); // Merge & remove BBs