[Beignet] [PATCH] enable 64bit-integer versions of "max, min, clamp"

[Homer Hsing]

CPU instruction "sel_cmp" don't support 64bit int.
not emit SelectModifierInstructionPattern in that case.
tested by piglit. piglit test cases "long(ulong)-max(min,clamp)" all passed.

Signed-off-by: Homer Hsing <homer.xing at intel.com>
---
 backend/src/backend/gen_insn_selection.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/backend/src/backend/gen_insn_selection.cpp b/backend/src/backend/gen_insn_selection.cpp
index 8e4cd8f..90ffd7c 100644
--- a/backend/src/backend/gen_insn_selection.cpp
+++ b/backend/src/backend/gen_insn_selection.cpp
@@ -1737,6 +1737,9 @@ namespace gbe
       SelectionDAG *cmp = dag.child[0];
       const SelectInstruction &insn = cast<SelectInstruction>(dag.insn);
 
+      if (insn.getType() == TYPE_S64 || insn.getType() == TYPE_U64) // not support
+        return false;
+
       // Not in this block
       if (cmp == NULL) return false;
 
-- 
1.8.1.2