[llvm-commits] [llvm] r157150 - in /llvm/trunk: lib/CodeGen/SelectionDAG/FastISel.cpp test/CodeGen/X86/fast-isel.ll

[Jakob Stoklund Olesen]

Author: stoklund
Date: Sun May 20 01:38:37 2012
New Revision: 157150

URL: http://llvm.org/viewvc/llvm-project?rev=157150&view=rev
Log:
Properly constrain register classes for sub-registers.

Not all GR64 registers have sub_8bit sub-registers.

Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/FastISel.cpp
    llvm/trunk/test/CodeGen/X86/fast-isel.ll

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/FastISel.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/FastISel.cpp?rev=157150&r1=157149&r2=157150&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/FastISel.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/FastISel.cpp Sun May 20 01:38:37 2012
@@ -1345,6 +1345,8 @@
   unsigned ResultReg = createResultReg(TLI.getRegClassFor(RetVT));
   assert(TargetRegisterInfo::isVirtualRegister(Op0) &&
          "Cannot yet extract from physregs");
+  const TargetRegisterClass *RC = MRI.getRegClass(Op0);
+  MRI.constrainRegClass(Op0, TRI.getSubClassWithSubReg(RC, Idx));
   BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt,
           DL, TII.get(TargetOpcode::COPY), ResultReg)
     .addReg(Op0, getKillRegState(Op0IsKill), Idx);

Modified: llvm/trunk/test/CodeGen/X86/fast-isel.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/fast-isel.ll?rev=157150&r1=157149&r2=157150&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/fast-isel.ll (original)
+++ llvm/trunk/test/CodeGen/X86/fast-isel.ll Sun May 20 01:38:37 2012
@@ -1,5 +1,5 @@
-; RUN: llc < %s -fast-isel -fast-isel-abort -march=x86 -mattr=sse2
-; RUN: llc < %s -fast-isel -fast-isel-abort -mtriple=x86_64-apple-darwin10
+; RUN: llc < %s -fast-isel -fast-isel-abort -verify-machineinstrs -march=x86 -mattr=sse2
+; RUN: llc < %s -fast-isel -fast-isel-abort -verify-machineinstrs -mtriple=x86_64-apple-darwin10
 
 ; This tests very minimal fast-isel functionality.