6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-09-25 17:20:48 +00:00
Code Issues Projects Releases Wiki Activity

Ensure all defs referring to a virtual register are marked dead by addRegisterDead().

Browse Source 
There can be multiple defs for a single virtual register when they are defining
sub-registers.

The missing <dead> flag was stopping the inline spiller from eliminating dead
code after rematerialization.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@128888 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2011-04-05 16:53:50 +00:00
parent 8439747236
commit b793bc1cca
2 changed files with 7 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
lib/CodeGen/MachineInstr.cpp
View File

@@ -1543,13 +1543,8 @@ bool MachineInstr::addRegisterDead(unsigned IncomingReg,
continue;
if (Reg == IncomingReg) {
if (!Found) {
if (MO.isDead())
// The register is already marked dead.
return true;
MO.setIsDead();
Found = true;
}
MO.setIsDead();
Found = true;
} else if (hasAliases && MO.isDead() &&
TargetRegisterInfo::isPhysicalRegister(Reg)) {
// There exists a super-register that's marked dead.