[llvm-commits] [llvm] r147869 - /llvm/trunk/lib/Target/X86/X86ISelLowering.cpp

[Bill Wendling]

Author: void
Date: Tue Jan 10 13:41:30 2012
New Revision: 147869

URL: http://llvm.org/viewvc/llvm-project?rev=147869&view=rev
Log:
For i386, don't use the generic code.

As the comment around 7746 says, it's better to use the x87 extended precision
here than SSE. And the generic code doesn't know how to do that. It also regains
the speed lost for the uint64_to_float.c testcase.
<rdar://problem/10669858>

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=147869&r1=147868&r2=147869&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Tue Jan 10 13:41:30 2012
@@ -7714,7 +7714,8 @@
     return LowerUINT_TO_FP_i64(Op, DAG);
   else if (SrcVT == MVT::i32 && X86ScalarSSEf64)
     return LowerUINT_TO_FP_i32(Op, DAG);
-  else if (SrcVT == MVT::i64 && DstVT == MVT::f32)
+  else if (Subtarget->is64Bit() &&
+           SrcVT == MVT::i64 && DstVT == MVT::f32)
     return SDValue();
 
   // Make a 64-bit buffer, and use it to build an FILD.
@@ -7735,7 +7736,7 @@
 
   assert(SrcVT == MVT::i64 && "Unexpected type in UINT_TO_FP");
   SDValue Store = DAG.getStore(DAG.getEntryNode(), dl, Op.getOperand(0),
-                                StackSlot, MachinePointerInfo(),
+                               StackSlot, MachinePointerInfo(),
                                false, false, 0);
   // For i64 source, we need to add the appropriate power of 2 if the input
   // was negative.  This is the same as the optimization in