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Make sure to handle small negative values hiding as large unsigned longs --

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this is a common case created by the front-end.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4127 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vikram S. Adve 2002-10-13 00:04:26 +00:00
parent d0451a9233
commit 893cace8e2
1 changed files with 10 additions and 4 deletions
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14
lib/Target/SparcV9/SparcV9InstrInfo.cpp
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@ -266,7 +266,7 @@ CreateIntSetInstruction(const TargetMachine& target,
// Entry == 0 ==> no immediate constant field exists at all.
// Entry > 0 ==> abs(immediate constant) <= Entry
//
vector<unsigned int> MaxConstantsTable(Instruction::NumOtherOps);
vector<int> MaxConstantsTable(Instruction::NumOtherOps);
static int
MaxConstantForInstr(unsigned llvmOpCode)
@ -343,13 +343,14 @@ UltraSparcInstrInfo::ConstantMayNotFitInImmedField(const Constant* CV,
return false;
if (const ConstantUInt* U = dyn_cast<ConstantUInt>(CV))
return (U->getValue() > MaxConstantsTable[I->getOpcode()]);
/* Large unsigned longs may really just be small negative signed longs */
return (labs((int64_t) U->getValue()) > MaxConstantsTable[I->getOpcode()]);
if (const ConstantSInt* S = dyn_cast<ConstantSInt>(CV))
return (labs(S->getValue()) > (int) MaxConstantsTable[I->getOpcode()]);
return (labs(S->getValue()) > MaxConstantsTable[I->getOpcode()]);
if (isa<ConstantBool>(CV))
return (1U > MaxConstantsTable[I->getOpcode()]);
return (1 > MaxConstantsTable[I->getOpcode()]);
return true;
}
@ -380,6 +381,11 @@ UltraSparcInstrInfo::CreateCodeToLoadConst(const TargetMachine& target,
//
const Type* valType = val->getType();
// Unfortunate special case: a ConstantPointerRef is just a
// reference to GlobalValue.
if (isa<ConstantPointerRef>(val))
val = cast<ConstantPointerRef>(val)->getValue();
if (isa<GlobalValue>(val))
{
TmpInstruction* tmpReg =