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authorEvan Cheng <evan.cheng@apple.com>2012-01-07 03:02:36 +0000
committerEvan Cheng <evan.cheng@apple.com>2012-01-07 03:02:36 +0000
commit977679d6034791fd48a344e5b990503ba50fc242 (patch)
treea53e7c18e92d71fe32a7df3f76f4231433bc08eb /lib/CodeGen/CMakeLists.txt
parentccec74738d0fc34f4bc2ac6909324e62705f1c38 (diff)
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Added a late machine instruction copy propagation pass. This catches
opportunities that only present themselves after late optimizations such as tail duplication .e.g. ## BB#1: movl %eax, %ecx movl %ecx, %eax ret The register allocator also leaves some of them around (due to false dep between copies from phi-elimination, etc.) This required some changes in codegen passes. Post-ra scheduler and the pseudo-instruction expansion passes have been moved after branch folding and tail merging. They were before branch folding before because it did not always update block livein's. That's fixed now. The pass change makes independently since we want to properly schedule instructions after branch folding / tail duplication. rdar://10428165 rdar://10640363 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147716 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/CMakeLists.txt')
-rw-r--r--lib/CodeGen/CMakeLists.txt1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/CodeGen/CMakeLists.txt b/lib/CodeGen/CMakeLists.txt
index ce9d0d4d0d..7fa5e47f9e 100644
--- a/lib/CodeGen/CMakeLists.txt
+++ b/lib/CodeGen/CMakeLists.txt
@@ -40,6 +40,7 @@ add_llvm_library(LLVMCodeGen
MachineBlockPlacement.cpp
MachineBranchProbabilityInfo.cpp
MachineCodeEmitter.cpp
+ MachineCopyPropagation.cpp
MachineCSE.cpp
MachineDominators.cpp
MachineFunction.cpp