https://bugs.llvm.org/show_bug.cgi?id=39640
Bug ID: 39640
Summary: MachineOperand TargetFlags truncation
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: Common Code Generator Code
Assignee: unassignedb...@nondot.org
Reporter: mar...@synopsys.com
CC: llvm-bugs@lists.llvm.org
/// Subregister number for MO_Register. A value of 0 indicates the
/// MO_Register has no subReg.
///
/// For all other kinds of operands, this field holds target-specific flags.
unsigned SubReg_TargetFlags : 12;
We have 12 bits for the field but are using "unsigned char" for setter values:
/// Replace this operand with a target index.
void ChangeToTargetIndex(unsigned Idx, int64_t Offset,
unsigned char TargetFlags = 0);
static MachineOperand CreateMBB(MachineBasicBlock *MBB,
unsigned char TargetFlags = 0) {
static MachineOperand CreateCPI(unsigned Idx, int Offset,
unsigned char TargetFlags = 0) {
static MachineOperand CreateTargetIndex(unsigned Idx, int64_t Offset,
unsigned char TargetFlags = 0) {
And so forth
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