commit 676dd7c80b6f91178452535ac45ca58feb23cc42
author Evan Cheng <evan.cheng@apple.com> Tue Mar 11 07:19:34 2008 +0000
committer Evan Cheng <evan.cheng@apple.com> Tue Mar 11 07:19:34 2008 +0000
tree 33282790f7a542b3ef2f3af7a23646d8f8514a1c
parent 204496d58e7e740f0da6d41c6214a91d67950d26

When the register allocator runs out of registers, spill a physical register around the def's and use's of the interval being allocated to make it possible for the interval to target a register and spill it right away and restore a register for uses. This likely generates terrible code but is before than aborting.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48218 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/SelectionDAG/ScheduleDAG.cpp

diff --git a/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp b/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
index 032ef5e..c042acb 100644
--- a/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
@@ -61,7 +61,7 @@
         II.ImplicitDefs[ResNo - II.getNumDefs()] == Reg) {
       PhysReg = Reg;
       const TargetRegisterClass *RC =
-        TRI->getPhysicalRegisterRegClass(Def->getValueType(ResNo), Reg);
+        TRI->getPhysicalRegisterRegClass(Reg, Def->getValueType(ResNo));
       Cost = RC->getCopyCost();
     }
   }
@@ -433,7 +433,7 @@
   }
 
   const TargetRegisterClass *SrcRC = 0, *DstRC = 0;
-  SrcRC = TRI->getPhysicalRegisterRegClass(Node->getValueType(ResNo), SrcReg);
+  SrcRC = TRI->getPhysicalRegisterRegClass(SrcReg, Node->getValueType(ResNo));
   
   // Figure out the register class to create for the destreg.
   if (VRBase) {
@@ -862,14 +862,13 @@
       if (TargetRegisterInfo::isVirtualRegister(SrcReg))
         SrcTRC = RegInfo.getRegClass(SrcReg);
       else
-        SrcTRC = TRI->getPhysicalRegisterRegClass(SrcVal.getValueType(),SrcReg);
+        SrcTRC = TRI->getPhysicalRegisterRegClass(SrcReg,SrcVal.getValueType());
 
       if (TargetRegisterInfo::isVirtualRegister(DestReg))
         DstTRC = RegInfo.getRegClass(DestReg);
       else
-        DstTRC = TRI->getPhysicalRegisterRegClass(
-                                            Node->getOperand(1).getValueType(),
-                                                  DestReg);
+        DstTRC = TRI->getPhysicalRegisterRegClass(DestReg,
+                                            Node->getOperand(1).getValueType());
       TII->copyRegToReg(*BB, BB->end(), DestReg, SrcReg, DstTRC, SrcTRC);
       break;
     }