Fix a significant recent(?) regression. StackSlotColoring no longer did anything
because LiveStackAnalysis was not preserved by VirtRegWriter. This caused
big stack usage regression in some cases.
rdar://12340383
llvm-svn: 164408
diff --git a/llvm/lib/CodeGen/LiveStackAnalysis.cpp b/llvm/lib/CodeGen/LiveStackAnalysis.cpp
index 939e795..f0b522b 100644
--- a/llvm/lib/CodeGen/LiveStackAnalysis.cpp
+++ b/llvm/lib/CodeGen/LiveStackAnalysis.cpp
@@ -25,7 +25,10 @@
using namespace llvm;
char LiveStacks::ID = 0;
-INITIALIZE_PASS(LiveStacks, "livestacks",
+INITIALIZE_PASS_BEGIN(LiveStacks, "livestacks",
+ "Live Stack Slot Analysis", false, false)
+INITIALIZE_PASS_DEPENDENCY(SlotIndexes)
+INITIALIZE_PASS_END(LiveStacks, "livestacks",
"Live Stack Slot Analysis", false, false)
char &llvm::LiveStacksID = LiveStacks::ID;