From 72e7dbf88be36b96aefd9fe8912f33ab8afb7352 Mon Sep 17 00:00:00 2001 From: Jakob Stoklund Olesen Date: Fri, 27 Jul 2012 20:19:49 +0000 Subject: Add 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 --- lib/CodeGen/ExpandPostRAPseudos.cpp | 11 +++++++---- 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 ; ; PR12821 -- cgit v1.2.3