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Don't need to load a NULL pointer constant from memory!

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1305 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Vikram S. Adve 2001-11-14 17:24:49 +00:00
parent c9c6aa0445
commit c811745156
2 changed files with 20 additions and 4 deletions
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12
lib/CodeGen/InstrSelection/InstrSelectionSupport.cpp
View File

@ -241,14 +241,22 @@ ChooseRegOrImmed(Value* val,
return MachineOperand::MO_SignExtendedImmed;
}
if (!CPV->getType()->isIntegral()) return opType;
// Otherwise it needs to be an integer or a NULL pointer
if (! CPV->getType()->isIntegral() &&
! (CPV->getType()->isPointerType() &&
CPV->isNullValue()))
return opType;
// Now get the constant value and check if it fits in the IMMED field.
// Take advantage of the fact that the max unsigned value will rarely
// fit into any IMMED field and ignore that case (i.e., cast smaller
// unsigned constants to signed).
//
int64_t intValue;
if (CPV->getType()->isPointerType())
{
intValue = 0;
}
if (CPV->getType()->isSigned())
{
intValue = ((ConstPoolSInt*)CPV)->getValue();

12
lib/Target/SparcV9/InstrSelection/InstrSelectionSupport.cpp
View File

@ -241,14 +241,22 @@ ChooseRegOrImmed(Value* val,
return MachineOperand::MO_SignExtendedImmed;
}
if (!CPV->getType()->isIntegral()) return opType;
// Otherwise it needs to be an integer or a NULL pointer
if (! CPV->getType()->isIntegral() &&
! (CPV->getType()->isPointerType() &&
CPV->isNullValue()))
return opType;
// Now get the constant value and check if it fits in the IMMED field.
// Take advantage of the fact that the max unsigned value will rarely
// fit into any IMMED field and ignore that case (i.e., cast smaller
// unsigned constants to signed).
//
int64_t intValue;
if (CPV->getType()->isPointerType())
{
intValue = 0;
}
if (CPV->getType()->isSigned())
{
intValue = ((ConstPoolSInt*)CPV)->getValue();