replica
/
hanchenye-llvm-project
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

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

llvm-svn: 1305
This commit is contained in:
Vikram S. Adve 2001-11-14 17:24:49 +00:00
parent ea1a93b95d
commit c1b534043f
1 changed files with 10 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
llvm/lib/CodeGen/InstrSelection/InstrSelectionSupport.cpp
View File

@ -241,14 +241,22 @@ ChooseRegOrImmed(Value* val,
return MachineOperand::MO_SignExtendedImmed; 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. // 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 // 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 // fit into any IMMED field and ignore that case (i.e., cast smaller
// unsigned constants to signed). // unsigned constants to signed).
// //
int64_t intValue; int64_t intValue;
if (CPV->getType()->isPointerType())
{
intValue = 0;
}
if (CPV->getType()->isSigned()) if (CPV->getType()->isSigned())
{ {
intValue = ((ConstPoolSInt*)CPV)->getValue(); intValue = ((ConstPoolSInt*)CPV)->getValue();