From db5f5e64fe2a7266fe5ed126fa2e92e5c0f71833 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Mon, 3 Jan 2011 06:19:09 +0000 Subject: [PATCH] Turn on earlycse by default. This seems to be a small performance improvement in the generated code, and speeds up 'opt -std-compile-opts' compile time on 176.gcc from 24.84s to 23.2s (about 7%). This also resolves a specific code quality issue in rdar://7352081 which was generating poor code for: int t(int a, int b) { if (a & b & 1) return a & b; return 3; } git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122740 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/Support/StandardPasses.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/llvm/Support/StandardPasses.h b/include/llvm/Support/StandardPasses.h index 7e32f1fbae7..6a428e7b4dd 100644 --- a/include/llvm/Support/StandardPasses.h +++ b/include/llvm/Support/StandardPasses.h @@ -129,9 +129,9 @@ namespace llvm { // Start of function pass. PM->add(createScalarReplAggregatesPass()); // Break up aggregate allocas + PM->add(createEarlyCSEPass()); // Catch trivial redundancies if (SimplifyLibCalls) PM->add(createSimplifyLibCallsPass()); // Library Call Optimizations - PM->add(createInstructionCombiningPass()); // Cleanup for scalarrepl. PM->add(createJumpThreadingPass()); // Thread jumps. PM->add(createCorrelatedValuePropagationPass()); // Propagate conditionals PM->add(createCFGSimplificationPass()); // Merge & remove BBs