Fix target/38697

2010-01-19  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>

       PR target/38697
       * config/arm/neon-testgen.m (emit_automatics): New parameter
	features. Adjust for Fixed_return_reg feature.
	(test_intrinsic): Call emit_automatics with new feature.
       * config/arm/neon.ml: Update copyright years.
	(features): New Fixed_return_reg feature.
	(ops): Update feature for Vget_low.

2010-01-19  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>

	PR target/38697.
	* gcc.target/arm/neon/vget_lowf32.c: Regenerate.
	* gcc.target/arm/neon/vget_lowp16.c: Likewise.
	* gcc.target/arm/neon/vget_lowp8.c:  Likewise.
	* gcc.target/arm/neon/vget_lows16.c: Likewise.
	* gcc.target/arm/neon/vget_lows32.c: Likewise.
	* gcc.target/arm/neon/vget_lows64.c: Likewise.
	* gcc.target/arm/neon/vget_lows8.c: Likewise.
	* gcc.target/arm/neon/vget_lowu16.c: Likewise.
	* gcc.target/arm/neon/vget_lowu32.c: Likewise.
	* gcc.target/arm/neon/vget_lowu64.c: Likewise.
	* gcc.target/arm/neon/vget_lowu8.c: Likewise.

From-SVN: r156042

gcc/ChangeLog

+2010-01-19  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
+
+       PR target/38697
+       * config/arm/neon-testgen.m (emit_automatics): New parameter
+	features. Adjust for Fixed_return_reg feature.
+	(test_intrinsic): Call emit_automatics with new feature.
+       * config/arm/neon.ml: Update copyright years.
+	(features): New Fixed_return_reg feature.
+	(ops): Update feature for Vget_low.
+
 2010-01-19  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/42719

gcc/config/arm/neon-testgen.ml

 (* Auto-generate ARM Neon intrinsics tests.
-   Copyright (C) 2006, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
    Contributed by CodeSourcery.
 
    This file is part of GCC.
@@ -58,7 +58,7 @@ let emit_prologue chan test_name =
 
 (* Emit declarations of local variables that are going to be passed
    to an intrinsic, together with one to take a returned value if needed.  *)
-let emit_automatics chan c_types =
+let emit_automatics chan c_types features =
   let emit () =
     ignore (
       List.fold_left (fun arg_number -> fun (flags, ty) ->
@@ -75,11 +75,17 @@ let emit_automatics chan c_types =
   in
     match c_types with
       (_, return_ty) :: tys ->
-        if return_ty <> "void" then
-          (* The intrinsic returns a value.  *)
-          (Printf.fprintf chan "  %s out_%s;\n" return_ty return_ty;
-           emit ())
-        else
+        if return_ty <> "void" then begin
+          (* The intrinsic returns a value.  We need to do explict register
+             allocation for vget_low tests or they fail because of copy
+             elimination.  *)
+          ((if List.mem Fixed_return_reg features then
+              Printf.fprintf chan "  register %s out_%s asm (\"d18\");\n"
+                             return_ty return_ty
+            else
+              Printf.fprintf chan "  %s out_%s;\n" return_ty return_ty);
+	   emit ())
+        end else
           (* The intrinsic does not return a value.  *)
           emit ()
     | _ -> assert false
@@ -257,7 +263,7 @@ let test_intrinsic dir opcode features shape name munge elt_ty =
     (* Emit file and function prologues.  *)
     emit_prologue chan test_name;
     (* Emit local variable declarations.  *)
-    emit_automatics chan c_types;
+    emit_automatics chan c_types features;
     Printf.fprintf chan "\n";
     (* Emit the call to the intrinsic.  *)
     emit_call chan const_valuator c_types name elt_ty;

gcc/config/arm/neon.ml

 (* Common code for ARM NEON header file, documentation and test case
    generators.
 
-   Copyright (C) 2006, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
    Contributed by CodeSourcery.
 
    This file is part of GCC.
@@ -234,6 +234,7 @@ type features =
        cases.  The function supplied must return the integer to be written
        into the testcase for the argument number (0-based) supplied to it.  *)
   | Const_valuator of (int -> int)
+  | Fixed_return_reg
 
 exception MixedMode of elts * elts
 
@@ -1089,9 +1090,13 @@ let ops =
       Use_operands [| Dreg; Qreg |], "vget_high",
       notype_1, pf_su_8_64;
     Vget_low, [Instruction_name ["vmov"];
-               Disassembles_as [Use_operands [| Dreg; Dreg |]]],
+               Disassembles_as [Use_operands [| Dreg; Dreg |]];
+	       Fixed_return_reg],
       Use_operands [| Dreg; Qreg |], "vget_low",
-      notype_1, pf_su_8_64;
+      notype_1, pf_su_8_32;
+     Vget_low, [No_op],
+      Use_operands [| Dreg; Qreg |], "vget_low",
+      notype_1, [S64; U64];
 
     (* Conversions.  *)
     Vcvt, [InfoWord], All (2, Dreg), "vcvt", conv_1,

gcc/testsuite/ChangeLog

+2010-01-19  Ramana Radhakrishnan  <ramana.radhakrishnan@arm.com>
+
+	PR target/38697.
+	* gcc.target/arm/neon/vget_lowf32.c: Regenerate.
+	* gcc.target/arm/neon/vget_lowp16.c: Likewise.
+	* gcc.target/arm/neon/vget_lowp8.c:  Likewise.
+	* gcc.target/arm/neon/vget_lows16.c: Likewise.
+	* gcc.target/arm/neon/vget_lows32.c: Likewise.
+	* gcc.target/arm/neon/vget_lows64.c: Likewise.
+	* gcc.target/arm/neon/vget_lows8.c: Likewise.
+	* gcc.target/arm/neon/vget_lowu16.c: Likewise.
+	* gcc.target/arm/neon/vget_lowu32.c: Likewise.
+	* gcc.target/arm/neon/vget_lowu64.c: Likewise.
+	* gcc.target/arm/neon/vget_lowu8.c: Likewise.
+
 2010-01-19  Janus Weil  <janus@gcc.gnu.org>
 
 	PR fortran/42545

gcc/testsuite/gcc.target/arm/neon/vget_lowf32.c

@@ -9,7 +9,7 @@
 
 void test_vget_lowf32 (void)
 {
-  float32x2_t out_float32x2_t;
+  register float32x2_t out_float32x2_t asm ("d18");
   float32x4_t arg0_float32x4_t;
 
   out_float32x2_t = vget_low_f32 (arg0_float32x4_t);

gcc/testsuite/gcc.target/arm/neon/vget_lowp16.c

@@ -9,7 +9,7 @@
 
 void test_vget_lowp16 (void)
 {
-  poly16x4_t out_poly16x4_t;
+  register poly16x4_t out_poly16x4_t asm ("d18");
   poly16x8_t arg0_poly16x8_t;
 
   out_poly16x4_t = vget_low_p16 (arg0_poly16x8_t);

gcc/testsuite/gcc.target/arm/neon/vget_lowp8.c

@@ -9,7 +9,7 @@
 
 void test_vget_lowp8 (void)
 {
-  poly8x8_t out_poly8x8_t;
+  register poly8x8_t out_poly8x8_t asm ("d18");
   poly8x16_t arg0_poly8x16_t;
 
   out_poly8x8_t = vget_low_p8 (arg0_poly8x16_t);

gcc/testsuite/gcc.target/arm/neon/vget_lows16.c

@@ -9,7 +9,7 @@
 
 void test_vget_lows16 (void)
 {
-  int16x4_t out_int16x4_t;
+  register int16x4_t out_int16x4_t asm ("d18");
   int16x8_t arg0_int16x8_t;
 
   out_int16x4_t = vget_low_s16 (arg0_int16x8_t);

gcc/testsuite/gcc.target/arm/neon/vget_lows32.c

@@ -9,7 +9,7 @@
 
 void test_vget_lows32 (void)
 {
-  int32x2_t out_int32x2_t;
+  register int32x2_t out_int32x2_t asm ("d18");
   int32x4_t arg0_int32x4_t;
 
   out_int32x2_t = vget_low_s32 (arg0_int32x4_t);

gcc/testsuite/gcc.target/arm/neon/vget_lows64.c

@@ -15,5 +15,4 @@ void test_vget_lows64 (void)
   out_int64x1_t = vget_low_s64 (arg0_int64x2_t);
 }
 
-/* { dg-final { scan-assembler "vmov\[ 	\]+\[dD\]\[0-9\]+, \[dD\]\[0-9\]+!?\(\[ 	\]+@\[a-zA-Z0-9 \]+\)?\n" } } */
 /* { dg-final { cleanup-saved-temps } } */

gcc/testsuite/gcc.target/arm/neon/vget_lows8.c

@@ -9,7 +9,7 @@
 
 void test_vget_lows8 (void)
 {
-  int8x8_t out_int8x8_t;
+  register int8x8_t out_int8x8_t asm ("d18");
   int8x16_t arg0_int8x16_t;
 
   out_int8x8_t = vget_low_s8 (arg0_int8x16_t);

gcc/testsuite/gcc.target/arm/neon/vget_lowu16.c

@@ -9,7 +9,7 @@
 
 void test_vget_lowu16 (void)
 {
-  uint16x4_t out_uint16x4_t;
+  register uint16x4_t out_uint16x4_t asm ("d18");
   uint16x8_t arg0_uint16x8_t;
 
   out_uint16x4_t = vget_low_u16 (arg0_uint16x8_t);

gcc/testsuite/gcc.target/arm/neon/vget_lowu32.c

@@ -9,7 +9,7 @@
 
 void test_vget_lowu32 (void)
 {
-  uint32x2_t out_uint32x2_t;
+  register uint32x2_t out_uint32x2_t asm ("d18");
   uint32x4_t arg0_uint32x4_t;
 
   out_uint32x2_t = vget_low_u32 (arg0_uint32x4_t);

gcc/testsuite/gcc.target/arm/neon/vget_lowu64.c

@@ -15,5 +15,4 @@ void test_vget_lowu64 (void)
   out_uint64x1_t = vget_low_u64 (arg0_uint64x2_t);
 }
 
-/* { dg-final { scan-assembler "vmov\[ 	\]+\[dD\]\[0-9\]+, \[dD\]\[0-9\]+!?\(\[ 	\]+@\[a-zA-Z0-9 \]+\)?\n" } } */
 /* { dg-final { cleanup-saved-temps } } */

gcc/testsuite/gcc.target/arm/neon/vget_lowu8.c

@@ -9,7 +9,7 @@
 
 void test_vget_lowu8 (void)
 {
-  uint8x8_t out_uint8x8_t;
+  register uint8x8_t out_uint8x8_t asm ("d18");
   uint8x16_t arg0_uint8x16_t;
 
   out_uint8x8_t = vget_low_u8 (arg0_uint8x16_t);