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Fix extraStack calculation -- I think in fact it might be getting a bit *too*

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much stack, but that's better than not enough, which leads to miscompilations.

Fix FP vaarg.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18079 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Brian Gaeke 2004-11-21 03:35:22 +00:00
parent e1e2899e96
commit 79fe833411
2 changed files with 44 additions and 18 deletions
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31
lib/Target/Sparc/SparcV8ISelSimple.cpp
View File

@ -834,9 +834,9 @@ void V8ISel::visitCallInst(CallInst &I) {
}
}
unsigned extraStack = 0;
// How much extra call stack will we need?
for (unsigned i = 7; i < I.getNumOperands (); ++i) {
int extraStack = 0;
for (unsigned i = 0; i < I.getNumOperands (); ++i) {
switch (getClassB (I.getOperand (i)->getType ())) {
case cLong: extraStack += 8; break;
case cFloat: extraStack += 4; break;
@ -844,8 +844,13 @@ void V8ISel::visitCallInst(CallInst &I) {
default: extraStack += 4; break;
}
}
// Round up extra stack size to the nearest doubleword.
if (extraStack) { extraStack = (extraStack + 7) & ~7; }
extraStack -= 24;
if (extraStack < 0) {
extraStack = 0;
} else {
// Round up extra stack size to the nearest doubleword.
extraStack = (extraStack + 7) & ~7;
}
// Deal with args
static const unsigned OutgoingArgRegs[] = { V8::O0, V8::O1, V8::O2, V8::O3,
@ -1321,7 +1326,8 @@ void V8ISel::visitAllocaInst(AllocaInst &I) {
unsigned TmpReg2 = makeAnotherReg (Type::UIntTy);
unsigned StackAdjReg = makeAnotherReg (Type::UIntTy);
// StackAdjReg = (ArraySize * TySize) rounded up to nearest doubleword boundary
// StackAdjReg = (ArraySize * TySize) rounded up to nearest
// doubleword boundary.
BuildMI (BB, V8::UMULrr, 2, TmpReg1).addReg (ArraySizeReg).addReg (TySizeReg);
// Round up TmpReg1 to nearest doubleword boundary:
@ -1417,11 +1423,18 @@ void V8ISel::visitVAArgInst (VAArgInst &I) {
BuildMI (BB, V8::LD, 2, DestReg+1).addReg (VAList).addSImm (4);
return;
case Type::FloatTyID:
BuildMI (BB, V8::LDFri, 2, DestReg).addReg (VAList).addSImm (0);
case Type::DoubleTyID: {
unsigned DblAlign = TM.getTargetData().getDoubleAlignment();
unsigned TempReg = makeAnotherReg (Type::IntTy);
unsigned TempReg2 = makeAnotherReg (Type::IntTy);
int FI = F->getFrameInfo()->CreateStackObject(8, DblAlign);
BuildMI (BB, V8::LD, 2, TempReg).addReg (VAList).addSImm (0);
BuildMI (BB, V8::LD, 2, TempReg2).addReg (VAList).addSImm (4);
BuildMI (BB, V8::ST, 3).addFrameIndex (FI).addSImm (0).addReg (TempReg);
BuildMI (BB, V8::ST, 3).addFrameIndex (FI).addSImm (4).addReg (TempReg2);
BuildMI (BB, V8::LDDFri, 2, DestReg).addFrameIndex (FI).addSImm (0);
return;
case Type::DoubleTyID:
}
default:
std::cerr << "Sorry, vaarg instruction of this type still unsupported:\n"

31
lib/Target/SparcV8/SparcV8ISelSimple.cpp
View File

@ -834,9 +834,9 @@ void V8ISel::visitCallInst(CallInst &I) {
}
}
unsigned extraStack = 0;
// How much extra call stack will we need?
for (unsigned i = 7; i < I.getNumOperands (); ++i) {
int extraStack = 0;
for (unsigned i = 0; i < I.getNumOperands (); ++i) {
switch (getClassB (I.getOperand (i)->getType ())) {
case cLong: extraStack += 8; break;
case cFloat: extraStack += 4; break;
@ -844,8 +844,13 @@ void V8ISel::visitCallInst(CallInst &I) {
default: extraStack += 4; break;
}
}
// Round up extra stack size to the nearest doubleword.
if (extraStack) { extraStack = (extraStack + 7) & ~7; }
extraStack -= 24;
if (extraStack < 0) {
extraStack = 0;
} else {
// Round up extra stack size to the nearest doubleword.
extraStack = (extraStack + 7) & ~7;
}
// Deal with args
static const unsigned OutgoingArgRegs[] = { V8::O0, V8::O1, V8::O2, V8::O3,
@ -1321,7 +1326,8 @@ void V8ISel::visitAllocaInst(AllocaInst &I) {
unsigned TmpReg2 = makeAnotherReg (Type::UIntTy);
unsigned StackAdjReg = makeAnotherReg (Type::UIntTy);
// StackAdjReg = (ArraySize * TySize) rounded up to nearest doubleword boundary
// StackAdjReg = (ArraySize * TySize) rounded up to nearest
// doubleword boundary.
BuildMI (BB, V8::UMULrr, 2, TmpReg1).addReg (ArraySizeReg).addReg (TySizeReg);
// Round up TmpReg1 to nearest doubleword boundary:
@ -1417,11 +1423,18 @@ void V8ISel::visitVAArgInst (VAArgInst &I) {
BuildMI (BB, V8::LD, 2, DestReg+1).addReg (VAList).addSImm (4);
return;
case Type::FloatTyID:
BuildMI (BB, V8::LDFri, 2, DestReg).addReg (VAList).addSImm (0);
case Type::DoubleTyID: {
unsigned DblAlign = TM.getTargetData().getDoubleAlignment();
unsigned TempReg = makeAnotherReg (Type::IntTy);
unsigned TempReg2 = makeAnotherReg (Type::IntTy);
int FI = F->getFrameInfo()->CreateStackObject(8, DblAlign);
BuildMI (BB, V8::LD, 2, TempReg).addReg (VAList).addSImm (0);
BuildMI (BB, V8::LD, 2, TempReg2).addReg (VAList).addSImm (4);
BuildMI (BB, V8::ST, 3).addFrameIndex (FI).addSImm (0).addReg (TempReg);
BuildMI (BB, V8::ST, 3).addFrameIndex (FI).addSImm (4).addReg (TempReg2);
BuildMI (BB, V8::LDDFri, 2, DestReg).addFrameIndex (FI).addSImm (0);
return;
case Type::DoubleTyID:
}
default:
std::cerr << "Sorry, vaarg instruction of this type still unsupported:\n"