R600: Add 64-bit float load/store support

* Added R600_Reg64 class
* Added T#Index#.XY registers definition
* Added v2i32 register reads from parameter and global space
* Added f32 and i32 elements extraction from v2f32 and v2i32
* Added v2i32 -> v2f32 conversions

Tom Stellard:
  - Mark vec2 operations as expand.  The addition of a vec2 register
    class made them all legal.

Patch by: Dmitry Cherkassov

Signed-off-by: Dmitry Cherkassov <dcherkassov@gmail.com>
llvm-svn: 187582
diff --git a/llvm/test/CodeGen/R600/fp_to_sint.ll b/llvm/test/CodeGen/R600/fp_to_sint.ll
index 7b430e3..6471270 100644
--- a/llvm/test/CodeGen/R600/fp_to_sint.ll
+++ b/llvm/test/CodeGen/R600/fp_to_sint.ll
@@ -1,6 +1,18 @@
 ; RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck %s --check-prefix=R600-CHECK
 ; RUN: llc < %s -march=r600 -mcpu=SI | FileCheck %s --check-prefix=SI-CHECK
 
+; R600-CHECK: @fp_to_sint_v2i32
+; R600-CHECK: FLT_TO_INT T{{[0-9]+\.[XYZW], PV\.[XYZW]}}
+; R600-CHECK: FLT_TO_INT * T{{[0-9]+\.[XYZW], PV\.[XYZW]}}
+; SI-CHECK: @fp_to_sint_v2i32
+; SI-CHECK: V_CVT_I32_F32_e32
+; SI-CHECK: V_CVT_I32_F32_e32
+define void @fp_to_sint_v2i32(<2 x i32> addrspace(1)* %out, <2 x float> %in) {
+  %result = fptosi <2 x float> %in to <2 x i32>
+  store <2 x i32> %result, <2 x i32> addrspace(1)* %out
+  ret void
+}
+
 ; R600-CHECK: @fp_to_sint_v4i32
 ; R600-CHECK: FLT_TO_INT {{[* ]*}}T{{[0-9]+\.[XYZW], PV\.[XYZW]}}
 ; R600-CHECK: FLT_TO_INT {{[* ]*}}T{{[0-9]+\.[XYZW], PV\.[XYZW]}}
@@ -11,7 +23,6 @@
 ; SI-CHECK: V_CVT_I32_F32_e32
 ; SI-CHECK: V_CVT_I32_F32_e32
 ; SI-CHECK: V_CVT_I32_F32_e32
-
 define void @fp_to_sint_v4i32(<4 x i32> addrspace(1)* %out, <4 x float> addrspace(1)* %in) {
   %value = load <4 x float> addrspace(1) * %in
   %result = fptosi <4 x float> %value to <4 x i32>