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Hook up AliasAnalysis in InlineSpiller. This is used for rematerializing

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constant loads.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118741 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2010-11-10 23:55:56 +00:00
parent 954ffff79b
commit e93198af07
2 changed files with 8 additions and 1 deletions
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5
lib/CodeGen/InlineSpiller.cpp
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@ -17,6 +17,7 @@
#include "LiveRangeEdit.h"
#include "SplitKit.h"
#include "VirtRegMap.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/CodeGen/LiveIntervalAnalysis.h"
#include "llvm/CodeGen/LiveStackAnalysis.h"
#include "llvm/CodeGen/MachineDominators.h"
@ -47,6 +48,7 @@ class InlineSpiller : public Spiller {
LiveStacks &lss_;
MachineDominatorTree &mdt_;
MachineLoopInfo &loops_;
AliasAnalysis *aa_;
VirtRegMap &vrm_;
MachineFrameInfo &mfi_;
MachineRegisterInfo &mri_;
@ -76,6 +78,7 @@ public:
lss_(pass.getAnalysis<LiveStacks>()),
mdt_(pass.getAnalysis<MachineDominatorTree>()),
loops_(pass.getAnalysis<MachineLoopInfo>()),
aa_(&pass.getAnalysis<AliasAnalysis>()),
vrm_(vrm),
mfi_(*mf.getFrameInfo()),
mri_(mf.getRegInfo()),
@ -219,7 +222,7 @@ bool InlineSpiller::reMaterializeFor(MachineBasicBlock::iterator MI) {
/// and trim the live ranges after.
void InlineSpiller::reMaterializeAll() {
// Do a quick scan of the interval values to find if any are remattable.
if (!edit_->anyRematerializable(lis_, tii_, 0))
if (!edit_->anyRematerializable(lis_, tii_, aa_))
return;
usedValues_.clear();

4
lib/CodeGen/RegAllocLinearScan.cpp
View File

@ -15,6 +15,7 @@
#include "VirtRegMap.h"
#include "VirtRegRewriter.h"
#include "Spiller.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/Function.h"
#include "llvm/CodeGen/CalcSpillWeights.h"
#include "llvm/CodeGen/LiveIntervalAnalysis.h"
@ -193,6 +194,8 @@ namespace {
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesCFG();
AU.addRequired<AliasAnalysis>();
AU.addPreserved<AliasAnalysis>();
AU.addRequired<LiveIntervals>();
AU.addPreserved<SlotIndexes>();
if (StrongPHIElim)
@ -391,6 +394,7 @@ INITIALIZE_PASS_DEPENDENCY(LiveStacks)
INITIALIZE_PASS_DEPENDENCY(MachineLoopInfo)
INITIALIZE_PASS_DEPENDENCY(VirtRegMap)
INITIALIZE_AG_DEPENDENCY(RegisterCoalescer)
INITIALIZE_AG_DEPENDENCY(AliasAnalysis)
INITIALIZE_PASS_END(RALinScan, "linearscan-regalloc",
"Linear Scan Register Allocator", false, false)