[llvm-commits] [llvm] r167488 - in /llvm/trunk: lib/Target/X86/X86ISelLowering.cpp test/Analysis/CostModel/X86/cast.ll

[Nadav Rotem]

Author: nadav
Date: Tue Nov  6 15:17:17 2012
New Revision: 167488

URL: http://llvm.org/viewvc/llvm-project?rev=167488&view=rev
Log:
CostModel: add another known vector trunc optimization.

Modified:
    llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
    llvm/trunk/test/Analysis/CostModel/X86/cast.ll

Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=167488&r1=167487&r2=167488&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Tue Nov  6 15:17:17 2012
@@ -17692,6 +17692,7 @@
     { ISD::FP_TO_SINT,  MVT::v4i8, MVT::v4f32,  1 },
     { ISD::ZERO_EXTEND, MVT::v8i32, MVT::v8i1,  6 },
     { ISD::SIGN_EXTEND, MVT::v8i32, MVT::v8i1,  9 },
+    { ISD::TRUNCATE,    MVT::v8i32, MVT::v8i64, 3 },
   };
 
   if (ST.hasAVX()) {

Modified: llvm/trunk/test/Analysis/CostModel/X86/cast.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Analysis/CostModel/X86/cast.ll?rev=167488&r1=167487&r2=167488&view=diff
==============================================================================
--- llvm/trunk/test/Analysis/CostModel/X86/cast.ll (original)
+++ llvm/trunk/test/Analysis/CostModel/X86/cast.ll Tue Nov  6 15:17:17 2012
@@ -53,6 +53,9 @@
   ;CHECK: cost of 1 {{.*}} trunc
   %F = trunc <8 x i32> undef to <8 x i16>
 
+  ;CHECK: cost of 3 {{.*}} trunc
+  %G = trunc <8 x i64> undef to <8 x i32>
+
   ret i32 undef
 }