6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-05-06 16:38:48 +00:00
Code Issues Projects Releases Wiki Activity

Handle regmasks in findRegisterDefOperandIdx().

Browse Source 
Only accept register masks when looking for an 'overlapping' def. When
Overlap is not set, the function searches for a proper definition of
Reg.

This means MI->modifiesRegister() considers register masks, but
MI->definesRegister() doesn't.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150529 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2012-02-14 23:49:37 +00:00
parent 6b7913893b
commit 1cf8b0f2a5
2 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/llvm/CodeGen/MachineInstr.h
View File

@ -702,6 +702,7 @@ public:
/// that are not dead are skipped. If Overlap is true, then it also looks for /// that are not dead are skipped. If Overlap is true, then it also looks for
/// defs that merely overlap the specified register. If TargetRegisterInfo is /// defs that merely overlap the specified register. If TargetRegisterInfo is
/// non-null, then it also checks if there is a def of a super-register. /// non-null, then it also checks if there is a def of a super-register.
/// This may also return a register mask operand when Overlap is true.
int findRegisterDefOperandIdx(unsigned Reg, int findRegisterDefOperandIdx(unsigned Reg,
bool isDead = false, bool Overlap = false, bool isDead = false, bool Overlap = false,
const TargetRegisterInfo *TRI = NULL) const; const TargetRegisterInfo *TRI = NULL) const;

4
lib/CodeGen/MachineInstr.cpp
View File

@ -1045,6 +1045,10 @@ MachineInstr::findRegisterDefOperandIdx(unsigned Reg, bool isDead, bool Overlap,
bool isPhys = TargetRegisterInfo::isPhysicalRegister(Reg); bool isPhys = TargetRegisterInfo::isPhysicalRegister(Reg);
for (unsigned i = 0, e = getNumOperands(); i != e; ++i) { for (unsigned i = 0, e = getNumOperands(); i != e; ++i) {
const MachineOperand &MO = getOperand(i); const MachineOperand &MO = getOperand(i);
// Accept regmask operands when Overlap is set.
// Ignore them when looking for a specific def operand (Overlap == false).
if (isPhys && Overlap && MO.isRegMask() && MO.clobbersPhysReg(Reg))
return i;
if (!MO.isReg() || !MO.isDef()) if (!MO.isReg() || !MO.isDef())
continue; continue;
unsigned MOReg = MO.getReg(); unsigned MOReg = MO.getReg();