http://llvm.org/bugs/show_bug.cgi?id=6335
Summary: TargetLowering::SimplifyDemandedBits incorrectly handles
vector types on Truncate
Product: libraries
Version: trunk
Platform: PC
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Common Code Generator Code
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
the code at lines 1394 and 1405 only get value ValueSize in bits instead of the
scalar size.
This was fixed in the sign extension instructions but not truncate.
TargetLowering:1394
APInt TruncMask = NewMask;
TruncMask.zext(Op.getOperand(0).getValueSizeInBits());
if (SimplifyDemandedBits(Op.getOperand(0), TruncMask,
KnownZero, KnownOne, TLO, Depth+1))
Needs to be:
unsigned OperandBitWidth =
Op.getOperand(0).getValueType().getScalarType().getSizeInBits();
APInt TruncMask = NewMask;
TruncMask.zext(OperandBitWidth);
if (SimplifyDemandedBits(Op.getOperand(0), TruncMask,
KnownZero, KnownOne, TLO, Depth+1))
Again:
if (Op.getOperand(0).getNode()->hasOneUse()) {
SDValue In = Op.getOperand(0);
unsigned InBitWidth = In.getValueSizeInBits();
switch (In.getOpcode()) {
Needs to be:
if (Op.getOperand(0).getNode()->hasOneUse()) {
SDValue In = Op.getOperand(0);
unsigned InBitWidth = In.getValueType().getScalarType().getSizeInBits();
switch (In.getOpcode()) {
--
Configure bugmail: http://llvm.org/bugs/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are on the CC list for the bug.
_______________________________________________
LLVMbugs mailing list
[email protected]
http://lists.cs.uiuc.edu/mailman/listinfo/llvmbugs
