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Removing the HasBuiltinSetjmp flag and associated bits. Flagging the presence

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of exception handling builtin sjlj targets in functions turns out not to 
be necessary. Marking the intrinsic implementation in the .td file as 
defining all registers is sufficient to get the context saved properly by 
the containing function.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71743 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2009-05-13 23:50:53 +00:00
parent 8308e8fae0
commit 2afb3b7251
4 changed files with 1 additions and 20 deletions
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12
include/llvm/CodeGen/MachineFunction.h
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@ -70,10 +70,6 @@ class MachineFunction : private Annotation {
const Function *Fn;
const TargetMachine &Target;
// HasBuiltinSetjmp - true if the function uses builtin_setjmp. Used to
// adjust callee-saved register tracking.
bool HasBuiltinSetjmp;
// RegInfo - Information about each register in use in the function.
MachineRegisterInfo *RegInfo;
@ -127,14 +123,6 @@ public:
///
const TargetMachine &getTarget() const { return Target; }
/// doesHaveBuiltinSetjmp - Return whether this function uses builtin_setjmp
///
bool doesHaveBuiltinSetjmp() const { return HasBuiltinSetjmp; }
/// setHasBuiltinSetjmp - Mark whether this function uses builtin_setjmp
///
void setHasBuiltinSetjmp (bool flag) { HasBuiltinSetjmp = flag; }
/// getRegInfo - Return information about the registers currently in use.
///
MachineRegisterInfo &getRegInfo() { return *RegInfo; }

1
lib/CodeGen/MachineFunction.cpp
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@ -121,7 +121,6 @@ MachineFunction::MachineFunction(const Function *F,
MachineRegisterInfo(*TM.getRegisterInfo());
else
RegInfo = 0;
HasBuiltinSetjmp = false;
MFInfo = 0;
FrameInfo = new (Allocator.Allocate<MachineFrameInfo>())
MachineFrameInfo(*TM.getFrameInfo());

2
lib/CodeGen/PrologEpilogInserter.cpp
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@ -180,7 +180,7 @@ void PEI::calculateCalleeSavedRegisters(MachineFunction &Fn) {
std::vector<CalleeSavedInfo> CSI;
for (unsigned i = 0; CSRegs[i]; ++i) {
unsigned Reg = CSRegs[i];
if (Fn.getRegInfo().isPhysRegUsed(Reg) || Fn.doesHaveBuiltinSetjmp()) {
if (Fn.getRegInfo().isPhysRegUsed(Reg)) {
// If the reg is modified, save it!
CSI.push_back(CalleeSavedInfo(Reg, CSRegClasses[i]));
} else {

6
lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
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@ -3849,12 +3849,6 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
case Intrinsic::longjmp:
return "_longjmp"+!TLI.usesUnderscoreLongJmp();
break;
case Intrinsic::builtinsetjmp:
// Mark this function has using builtin_setjmp so context gets preserved
DAG.getMachineFunction().setHasBuiltinSetjmp(true);
// Turn it into a target intrinsic node for the codegen
visitTargetIntrinsic(I, Intrinsic);
return 0;
case Intrinsic::memcpy: {
SDValue Op1 = getValue(I.getOperand(1));
SDValue Op2 = getValue(I.getOperand(2));