From 19e44b4510c565433ba0e74a4312b52000b90ade Mon Sep 17 00:00:00 2001 From: Evan Cheng Date: Tue, 9 Mar 2010 03:21:12 +0000 Subject: - Make the machine cse dumb coalescer (as opposed to the more awesome simple coalescer) handle sub-register classes. - Add heuristics to avoid non-profitable cse. Given the current lack of live range splitting, avoid cse when an expression has PHI use and the would be new use is in a BB where the expression wasn't already being used. llvm-svn: 98043 --- llvm/lib/CodeGen/LLVMTargetMachine.cpp | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'llvm/lib/CodeGen/LLVMTargetMachine.cpp') diff --git a/llvm/lib/CodeGen/LLVMTargetMachine.cpp b/llvm/lib/CodeGen/LLVMTargetMachine.cpp index 5e888650bae..03dd152d8cf 100644 --- a/llvm/lib/CodeGen/LLVMTargetMachine.cpp +++ b/llvm/lib/CodeGen/LLVMTargetMachine.cpp @@ -328,11 +328,11 @@ bool LLVMTargetMachine::addCommonCodeGenPasses(PassManagerBase &PM, PM.add(createOptimizeExtsPass()); if (!DisableMachineLICM) PM.add(createMachineLICMPass()); - if (EnableMachineCSE) + //if (EnableMachineCSE) PM.add(createMachineCSEPass()); if (!DisableMachineSink) PM.add(createMachineSinkingPass()); - printAndVerify(PM, "After MachineLICM and MachineSinking", + printAndVerify(PM, "After Machine LICM, CSE and Sinking passes", /* allowDoubleDefs= */ true); } -- cgit v1.2.3