[X86] Use PatFrag with hardcoded numbers for FROUND_NO_EXC/FROUND_CURRENT instead...

This more efficient for the isel table generator since we can use CheckChildInteger instead of MoveChild, CheckPredicate, MoveParent. This reduced the table size by 1-2K.

I wish there was a way to share the values with X86BaseInfo.h and still use a PatFrag like this. These numbers are fixed by the X86 intrinsic spec going back many years and we should never need to change them. So we shouldn't waste table bytes to support sharing.

llvm-svn: 335806

diff --git a/llvm/lib/Target/X86/X86InstrFragmentsSIMD.td b/llvm/lib/Target/X86/X86InstrFragmentsSIMD.td
index 1f4247b..824ad71 100644 (file)
--- a/llvm/lib/Target/X86/X86InstrFragmentsSIMD.td
+++ b/llvm/lib/Target/X86/X86InstrFragmentsSIMD.td
@@ -888,10 +888,8 @@ def I8Imm : SDNodeXForm<imm, [{
   return getI8Imm((uint8_t)N->getZExtValue(), SDLoc(N));
 }]>;
 
-def FROUND_NO_EXC : ImmLeaf<i32, [{ return Imm == 8; }]>;
-def FROUND_CURRENT : ImmLeaf<i32, [{
-  return Imm == X86::STATIC_ROUNDING::CUR_DIRECTION;
-}]>;
+def FROUND_NO_EXC : PatLeaf<(i32 8)>;
+def FROUND_CURRENT : PatLeaf<(i32 4)>;
 
 // BYTE_imm - Transform bit immediates into byte immediates.
 def BYTE_imm  : SDNodeXForm<imm, [{