[llvm-commits] [llvm] r48224 - /llvm/trunk/lib/Target/X86/X86InstrInfo.cpp
Christopher Lamb
christopher.lamb at gmail.com
Tue Mar 11 03:27:36 PDT 2008
Author: clamb
Date: Tue Mar 11 05:27:36 2008
New Revision: 48224
URL: http://llvm.org/viewvc/llvm-project?rev=48224&view=rev
Log:
Missed part of recommit.
Modified:
llvm/trunk/lib/Target/X86/X86InstrInfo.cpp
Modified: llvm/trunk/lib/Target/X86/X86InstrInfo.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86InstrInfo.cpp?rev=48224&r1=48223&r2=48224&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86InstrInfo.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86InstrInfo.cpp Tue Mar 11 05:27:36 2008
@@ -904,15 +904,18 @@
unsigned leaInReg = RegInfo.createVirtualRegister(&X86::GR32RegClass);
unsigned leaOutReg = RegInfo.createVirtualRegister(&X86::GR32RegClass);
- MachineInstr *Ins =
- BuildMI(get(X86::INSERT_SUBREG), leaInReg).addReg(Src).addImm(2);
- Ins->copyKillDeadInfo(MI);
+ // Build and insert into an implicit UNDEF value. This is OK because
+ // well be shifting and then extracting the lower 16-bits.
+ MachineInstr *Ins =
+ BuildMI(get(X86::INSERT_SUBREG),leaInReg).addImm(X86::IMPL_VAL_UNDEF)
+ .addReg(Src).addImm(X86::SUBREG_16BIT);
NewMI = BuildMI(get(Opc), leaOutReg)
.addReg(0).addImm(1 << ShAmt).addReg(leaInReg).addImm(0);
MachineInstr *Ext =
- BuildMI(get(X86::EXTRACT_SUBREG), Dest).addReg(leaOutReg).addImm(2);
+ BuildMI(get(X86::EXTRACT_SUBREG), Dest)
+ .addReg(leaOutReg).addImm(X86::SUBREG_16BIT);
Ext->copyKillDeadInfo(MI);
MFI->insert(MBBI, Ins); // Insert the insert_subreg
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