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Reset the target options and optimization level as the first 

thing we do inside selection dag. This code needs to be
migrated to queries on the function rather than global
data, but this organizes things before we start grabbing
the subtarget.

llvm-svn: 219271
This commit is contained in:
Eric Christopher 2014-10-08 01:58:01 +00:00
parent 8d07f44560
commit 896044822e
1 changed files with 13 additions and 8 deletions
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21
llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@ -411,23 +411,28 @@ bool SelectionDAGISel::runOnMachineFunction(MachineFunction &mf) {
"-fast-isel-abort requires -fast-isel");
const Function &Fn = *mf.getFunction();
const TargetInstrInfo &TII = *TM.getSubtargetImpl()->getInstrInfo();
const TargetRegisterInfo &TRI = *TM.getSubtargetImpl()->getRegisterInfo();
MF = &mf;
RegInfo = &MF->getRegInfo();
AA = &getAnalysis<AliasAnalysis>();
LibInfo = &getAnalysis<TargetLibraryInfo>();
GFI = Fn.hasGC() ? &getAnalysis<GCModuleInfo>().getFunctionInfo(Fn) : nullptr;
// Reset the target options before resetting the optimization
// level below.
// FIXME: This is a horrible hack and should be processed via
// codegen looking at the optimization level explicitly when
// it wants to look at it.
TM.resetTargetOptions(Fn);
// Reset OptLevel to None for optnone functions.
CodeGenOpt::Level NewOptLevel = OptLevel;
if (Fn.hasFnAttribute(Attribute::OptimizeNone))
NewOptLevel = CodeGenOpt::None;
OptLevelChanger OLC(*this, NewOptLevel);
const TargetInstrInfo &TII = *TM.getSubtargetImpl()->getInstrInfo();
const TargetRegisterInfo &TRI = *TM.getSubtargetImpl()->getRegisterInfo();
RegInfo = &MF->getRegInfo();
AA = &getAnalysis<AliasAnalysis>();
LibInfo = &getAnalysis<TargetLibraryInfo>();
GFI = Fn.hasGC() ? &getAnalysis<GCModuleInfo>().getFunctionInfo(Fn) : nullptr;
DEBUG(dbgs() << "\n\n\n=== " << Fn.getName() << "\n");
SplitCriticalSideEffectEdges(const_cast<Function&>(Fn), this);