[llvm-commits] [llvm] r97100 - /llvm/trunk/lib/Target/X86/X86ISelLowering.cpp

[Dan Gohman]

Author: djg
Date: Wed Feb 24 21:04:36 2010
New Revision: 97100

URL: http://llvm.org/viewvc/llvm-project?rev=97100&view=rev
Log:
Truncate from i64 to i32 is "free" on x86-32, because it involves 
just discarding one of the registers.

Modified:
    llvm/trunk/lib/Target/X86/X86ISelLowering.cpp

Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=97100&r1=97099&r2=97100&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Wed Feb 24 21:04:36 2010
@@ -7780,7 +7780,7 @@
   unsigned NumBits2 = Ty2->getPrimitiveSizeInBits();
   if (NumBits1 <= NumBits2)
     return false;
-  return Subtarget->is64Bit() || NumBits1 < 64;
+  return true;
 }
 
 bool X86TargetLowering::isTruncateFree(EVT VT1, EVT VT2) const {
@@ -7790,7 +7790,7 @@
   unsigned NumBits2 = VT2.getSizeInBits();
   if (NumBits1 <= NumBits2)
     return false;
-  return Subtarget->is64Bit() || NumBits1 < 64;
+  return true;
 }
 
 bool X86TargetLowering::isZExtFree(const Type *Ty1, const Type *Ty2) const {