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Remove the InstructionSimplifierPass immediately after InstructionCombiningPass.

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InstructionCombiningPass was added after LoopUnrollPass in r237395. Because
InstructionCombiningPass is strictly more powerful than InstructionSimplifierPass,
remove the unnecessary InstructionSimplifierPass.

Differential Revision: http://reviews.llvm.org/D9838


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237702 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Wei Mi 2015-05-19 16:09:11 +00:00
parent 42737039d5
commit 51891f2364
1 changed files with 0 additions and 4 deletions
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4
lib/Transforms/IPO/PassManagerBuilder.cpp
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@ -385,10 +385,6 @@ void PassManagerBuilder::populateModulePassManager(
// LoopUnroll may generate some redundency to cleanup. // LoopUnroll may generate some redundency to cleanup.
MPM.add(createInstructionCombiningPass()); MPM.add(createInstructionCombiningPass());
// This is a barrier pass to avoid combine LICM pass and loop unroll pass
// within same loop pass manager.
MPM.add(createInstructionSimplifierPass());
// Runtime unrolling will introduce runtime check in loop prologue. If the // Runtime unrolling will introduce runtime check in loop prologue. If the
// unrolled loop is a inner loop, then the prologue will be inside the // unrolled loop is a inner loop, then the prologue will be inside the
// outer loop. LICM pass can help to promote the runtime check out if the // outer loop. LICM pass can help to promote the runtime check out if the