[llvm-commits] [llvm] r142429 - /llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp

[Bill Wendling]

Author: void
Date: Tue Oct 18 16:55:58 2011
New Revision: 142429

URL: http://llvm.org/viewvc/llvm-project?rev=142429&view=rev
Log:
The immediate may be too large for the CMP instruction. Move it into a register
and use that in the CMP.
<rdar://problem/10305266>

Modified:
    llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp

Modified: llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp?rev=142429&r1=142428&r2=142429&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp Tue Oct 18 16:55:58 2011
@@ -5760,29 +5760,34 @@
                    .addFrameIndex(FI)
                    .addImm(4)
                    .addMemOperand(FIMMOLd));
-    AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2CMPri))
-                   .addReg(NewVReg1)
+
+    unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
+    AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2MOVi16), NewVReg2)
                    .addImm(LPadList.size()));
+
+    AddDefaultPred(BuildMI(DispatchBB, dl, TII->get(ARM::t2CMPrr))
+                   .addReg(NewVReg1)
+                   .addReg(NewVReg2));
     BuildMI(DispatchBB, dl, TII->get(ARM::t2Bcc))
       .addMBB(TrapBB)
       .addImm(ARMCC::HI)
       .addReg(ARM::CPSR);
 
-    unsigned NewVReg2 = MRI->createVirtualRegister(TRC);
-    AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::t2LEApcrelJT),NewVReg2)
+    unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
+    AddDefaultPred(BuildMI(DispContBB, dl, TII->get(ARM::t2LEApcrelJT),NewVReg3)
                    .addJumpTableIndex(MJTI)
                    .addImm(UId));
 
-    unsigned NewVReg3 = MRI->createVirtualRegister(TRC);
+    unsigned NewVReg4 = MRI->createVirtualRegister(TRC);
     AddDefaultCC(
       AddDefaultPred(
-        BuildMI(DispContBB, dl, TII->get(ARM::t2ADDrs), NewVReg3)
-        .addReg(NewVReg2, RegState::Kill)
+        BuildMI(DispContBB, dl, TII->get(ARM::t2ADDrs), NewVReg4)
+        .addReg(NewVReg3, RegState::Kill)
         .addReg(NewVReg1)
         .addImm(ARM_AM::getSORegOpc(ARM_AM::lsl, 2))));
 
     BuildMI(DispContBB, dl, TII->get(ARM::t2BR_JT))
-      .addReg(NewVReg3, RegState::Kill)
+      .addReg(NewVReg4, RegState::Kill)
       .addReg(NewVReg1)
       .addJumpTableIndex(MJTI)
       .addImm(UId);