[llvm-commits] [llvm] r118917 - /llvm/trunk/lib/Target/X86/X86FastISel.cpp

[Dan Gohman]

Author: djg
Date: Fri Nov 12 13:14:00 2010
New Revision: 118917

URL: http://llvm.org/viewvc/llvm-project?rev=118917&view=rev
Log:
When the definition of an address value is in a different block
from the user of the address, fall back to just using the
address in a register instead of bailing out of fast-isel
altogether.

Modified:
    llvm/trunk/lib/Target/X86/X86FastISel.cpp

Modified: llvm/trunk/lib/Target/X86/X86FastISel.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86FastISel.cpp?rev=118917&r1=118916&r2=118917&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86FastISel.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86FastISel.cpp Fri Nov 12 13:14:00 2010
@@ -320,11 +320,11 @@
     // Don't walk into other basic blocks; it's possible we haven't
     // visited them yet, so the instructions may not yet be assigned
     // virtual registers.
-    if (FuncInfo.MBBMap[I->getParent()] != FuncInfo.MBB)
-      return false;
-
-    Opcode = I->getOpcode();
-    U = I;
+    if (FuncInfo.StaticAllocaMap.count(static_cast<const AllocaInst *>(V)) ||
+        FuncInfo.MBBMap[I->getParent()] == FuncInfo.MBB) {
+      Opcode = I->getOpcode();
+      U = I;
+    }
   } else if (const ConstantExpr *C = dyn_cast<ConstantExpr>(V)) {
     Opcode = C->getOpcode();
     U = C;