RPCSX/llvm
1
0
Fork 0
mirror of https://github.com/RPCSX/llvm.git synced 2025-02-05 11:57:07 +00:00
Code Issues Actions Packages 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
Show Stats 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.

6
test/CodeGen/X86/coalescer-cross.ll
View File

@ -1,6 +1,10 @@
; RUN: llc < %s -mtriple=i386-apple-darwin10 | not grep movaps
; RUN: llc < %s -mtriple=i386-apple-darwin10 | FileCheck %s
; RUN: llc < %s -mtriple=i386-apple-darwin10 -regalloc=basic | FileCheck %s
; rdar://6509240
; CHECK: os_clock
; CHECK-NOT: movaps
type { %struct.TValue } ; type %0
type { %struct.L_Umaxalign, i32, %struct.Node* } ; type %1
%struct.CallInfo = type { %struct.TValue*, %struct.TValue*, %struct.TValue*, i32*, i32, i32 }