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
// 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