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Fix a significant recent(?) regression. StackSlotColoring no longer did anything

Browse Source 
because LiveStackAnalysis was not preserved by VirtRegWriter. This caused
big stack usage regression in some cases.

rdar://12340383


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@164408 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2012-09-21 20:04:28 +00:00
parent fdb6ec34cd
commit bb36a43872
4 changed files with 10 additions and 3 deletions
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5
lib/CodeGen/LiveStackAnalysis.cpp
View File

@ -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;

2
lib/CodeGen/RegAllocGreedy.cpp
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@ -330,9 +330,9 @@ void RAGreedy::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addPreserved<SlotIndexes>();
AU.addRequired<LiveDebugVariables>();
AU.addPreserved<LiveDebugVariables>();
AU.addRequired<CalculateSpillWeights>();
AU.addRequired<LiveStacks>();
AU.addPreserved<LiveStacks>();
AU.addRequired<CalculateSpillWeights>();
AU.addRequired<MachineDominatorTree>();
AU.addPreserved<MachineDominatorTree>();
AU.addRequired<MachineLoopInfo>();

2
lib/CodeGen/StackSlotColoring.cpp
View File

@ -11,7 +11,7 @@
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "stackcoloring"
#define DEBUG_TYPE "stackslotcoloring"
#include "llvm/Module.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/LiveIntervalAnalysis.h"

4
lib/CodeGen/VirtRegMap.cpp
View File

@ -20,6 +20,7 @@
#include "VirtRegMap.h"
#include "LiveDebugVariables.h"
#include "llvm/CodeGen/LiveIntervalAnalysis.h"
#include "llvm/CodeGen/LiveStackAnalysis.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
@ -171,6 +172,7 @@ INITIALIZE_PASS_BEGIN(VirtRegRewriter, "virtregrewriter",
INITIALIZE_PASS_DEPENDENCY(SlotIndexes)
INITIALIZE_PASS_DEPENDENCY(LiveIntervals)
INITIALIZE_PASS_DEPENDENCY(LiveDebugVariables)
INITIALIZE_PASS_DEPENDENCY(LiveStacks)
INITIALIZE_PASS_DEPENDENCY(VirtRegMap)
INITIALIZE_PASS_END(VirtRegRewriter, "virtregrewriter",
"Virtual Register Rewriter", false, false)
@ -183,6 +185,8 @@ void VirtRegRewriter::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<SlotIndexes>();
AU.addPreserved<SlotIndexes>();
AU.addRequired<LiveDebugVariables>();
AU.addRequired<LiveStacks>();
AU.addPreserved<LiveStacks>();
AU.addRequired<VirtRegMap>();
MachineFunctionPass::getAnalysisUsage(AU);
}