diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Passes/PassBuilder.cpp | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/llvm/lib/Passes/PassBuilder.cpp b/llvm/lib/Passes/PassBuilder.cpp index 8796ff56e5e..21d95a07125 100644 --- a/llvm/lib/Passes/PassBuilder.cpp +++ b/llvm/lib/Passes/PassBuilder.cpp @@ -751,8 +751,13 @@ PassBuilder::buildModuleOptimizationPipeline(OptimizationLevel Level, // Optimize parallel scalar instruction chains into SIMD instructions. OptimizePM.addPass(SLPVectorizerPass()); - // Cleanup after all of the vectorizers. - OptimizePM.addPass(SimplifyCFGPass()); + // Cleanup after all of the vectorizers. Simplification passes like CVP and + // GVN, loop transforms, and others have already run, so it's now better to + // convert to more optimized IR using more aggressive simplify CFG options. + OptimizePM.addPass(SimplifyCFGPass(SimplifyCFGOptions(). + forwardSwitchCondToPhi(true). + convertSwitchToLookupTable(true). + needCanonicalLoops(false))); OptimizePM.addPass(InstCombinePass()); // Unroll small loops to hide loop backedge latency and saturate any parallel |
