diff options
| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-07-27 20:19:49 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-07-27 20:19:49 +0000 |
| commit | 72e7dbf88be36b96aefd9fe8912f33ab8afb7352 (patch) | |
| tree | 7a1b6be439bd760155e53fedb36aeccd3431dfb5 | |
| parent | e82fafe9e22c7f0bb35ec4cb7d5428bf9e930807 (diff) | |
Add <imp-def> of super-register when lowering SUBREG_TO_REG.
Patch by Tyler Nowicki!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160888 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/CodeGen/ExpandPostRAPseudos.cpp | 11 | ||||
| -rw-r--r-- | test/CodeGen/X86/liveness-local-regalloc.ll | 2 |
2 files changed, 8 insertions, 5 deletions
diff --git a/lib/CodeGen/ExpandPostRAPseudos.cpp b/lib/CodeGen/ExpandPostRAPseudos.cpp index b14afc286d..7a17331ba1 100644 --- a/lib/CodeGen/ExpandPostRAPseudos.cpp +++ b/lib/CodeGen/ExpandPostRAPseudos.cpp @@ -131,13 +131,16 @@ bool ExpandPostRA::LowerSubregToReg(MachineInstr *MI) { } else { TII->copyPhysReg(*MBB, MI, MI->getDebugLoc(), DstSubReg, InsReg, MI->getOperand(2).isKill()); + + // Implicitly define DstReg for subsequent uses. + MachineBasicBlock::iterator CopyMI = MI; + --CopyMI; + CopyMI->addRegisterDefined(DstReg); + // Transfer the kill/dead flags, if needed. if (MI->getOperand(0).isDead()) TransferDeadFlag(MI, DstSubReg, TRI); - DEBUG({ - MachineBasicBlock::iterator dMI = MI; - dbgs() << "subreg: " << *(--dMI); - }); + DEBUG(dbgs() << "subreg: " << *CopyMI); } DEBUG(dbgs() << '\n'); diff --git a/test/CodeGen/X86/liveness-local-regalloc.ll b/test/CodeGen/X86/liveness-local-regalloc.ll index faeeaa7e9c..721f545985 100644 --- a/test/CodeGen/X86/liveness-local-regalloc.ll +++ b/test/CodeGen/X86/liveness-local-regalloc.ll @@ -1,4 +1,4 @@ -; RUN: llc < %s -mcpu=generic -regalloc=fast -optimize-regalloc=0 -verify-machineinstrs -mtriple=x86_64-apple-darwin10 +; RUN: llc < %s -regalloc=fast -optimize-regalloc=0 -verify-machineinstrs -mtriple=x86_64-apple-darwin10 ; <rdar://problem/7755473> ; PR12821 |