Disable double precision vectorizer for Atom.

gcc/

2010-09-13  H.J. Lu  <hongjiu.lu@intel.com>

	* config/i386/i386-protos.h (ix86_units_per_simd_word): New.

	* config/i386/i386.c (initial_ix86_tune_features): Add
	X86_TUNE_VECTORIZE_DOUBLE.
	(ix86_units_per_simd_word): New.

	* config/i386/i386.h (ix86_tune_indices): Add
	X86_TUNE_VECTORIZE_DOUBLE.
	(TARGET_VECTORIZE_DOUBLE): New.
	(UNITS_PER_SIMD_WORD): Defined with ix86_units_per_simd_word.

gcc/testsuite/

2010-09-13  H.J. Lu  <hongjiu.lu@intel.com>

	* gcc.target/i386/fma4-256-vector.c: Add -mtune=generic.
	* gcc.target/i386/fma4-vector.c: Likewise.
	* gcc.target/i386/vectorize2.c: Likewise.
	* gcc.target/i386/vectorize4.c: Likewise.
	* gcc.target/i386/vectorize5.c: Likewise.
	* gcc.target/i386/vectorize6.c: Likewise.
	* gcc.target/i386/vectorize8.c: Likewise.

	* gcc.target/i386/vect-double-1.c: New.
	* gcc.target/i386/vect-double-1a.c: Likewise.
	* gcc.target/i386/vect-double-2.c: Likewise.
	* gcc.target/i386/vect-double-2a.c: Likewise.

	* lib/target-supports.exp (check_effective_target_vect_double):
	Set et_vect_double_saved to 0 when tuning for Atom.

From-SVN: r164255

gcc/ChangeLog

+2010-09-13  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* config/i386/i386-protos.h (ix86_units_per_simd_word): New.
+
+	* config/i386/i386.c (initial_ix86_tune_features): Add
+	X86_TUNE_VECTORIZE_DOUBLE.
+	(ix86_units_per_simd_word): New.
+
+	* config/i386/i386.h (ix86_tune_indices): Add
+	X86_TUNE_VECTORIZE_DOUBLE.
+	(TARGET_VECTORIZE_DOUBLE): New.
+	(UNITS_PER_SIMD_WORD): Defined with ix86_units_per_simd_word.
+
 2010-09-13  Pat Haugen  <pthaugen@us.ibm.com>
 
 	* tree-ssa-ter.c (temp_expr_table_d): Add call_cnt field.

gcc/config/i386/i386-protos.h

@@ -50,6 +50,7 @@ extern bool x86_extended_QIreg_mentioned_p (rtx);
 extern bool x86_extended_reg_mentioned_p (rtx);
 extern bool x86_maybe_negate_const_int (rtx *, enum machine_mode);
 extern enum machine_mode ix86_cc_mode (enum rtx_code, rtx, rtx);
+extern unsigned int ix86_units_per_simd_word (enum machine_mode);
 
 extern int avx_vpermilp_parallel (rtx par, enum machine_mode mode);
 extern int avx_vperm2f128_parallel (rtx par, enum machine_mode mode);

gcc/config/i386/i386.c

@@ -1627,6 +1627,10 @@ static unsigned int initial_ix86_tune_features[X86_TUNE_LAST] = {
   /* X86_TUNE_OPT_AGU: Optimize for Address Generation Unit. This flag
      will impact LEA instruction selection. */
   m_ATOM,
+
+  /* X86_TUNE_VECTORIZE_DOUBLE: Enable double precision vector
+     instructions.  */
+  ~m_ATOM,
 };
 
 /* Feature tests against the various architecture variations.  */
@@ -32334,6 +32338,28 @@ has_dispatch (rtx insn, int action)
   return false;
 }
 
+/* ??? No autovectorization into MMX or 3DNOW until we can reliably
+   place emms and femms instructions.  */
+
+unsigned int
+ix86_units_per_simd_word (enum machine_mode mode)
+{
+  /* Disable double precision vectorizer if needed.  */
+  if (mode == DFmode && !TARGET_VECTORIZE_DOUBLE)
+    return UNITS_PER_WORD;
+
+#if 0
+  /*  FIXME: AVX has 32byte floating point vector operations and 16byte
+      integer vector operations.  But vectorizer doesn't support
+      different sizes for integer and floating point vectors.  We limit
+      vector size to 16byte.  */
+  if (TARGET_AVX)
+    return (mode == DFmode || mode == SFmode) ? 32 : 16;
+  else
+#endif
+    return TARGET_SSE ? 16 : UNITS_PER_WORD;
+}
+
 /* Initialize the GCC target structure.  */
 #undef TARGET_RETURN_IN_MEMORY
 #define TARGET_RETURN_IN_MEMORY ix86_return_in_memory

gcc/config/i386/i386.h

@@ -312,6 +312,7 @@ enum ix86_tune_indices {
   X86_TUNE_USE_VECTOR_CONVERTS,
   X86_TUNE_FUSE_CMP_AND_BRANCH,
   X86_TUNE_OPT_AGU,
+  X86_TUNE_VECTORIZE_DOUBLE,
 
   X86_TUNE_LAST
 };
@@ -404,6 +405,8 @@ extern unsigned char ix86_tune_features[X86_TUNE_LAST];
 #define TARGET_FUSE_CMP_AND_BRANCH \
 	ix86_tune_features[X86_TUNE_FUSE_CMP_AND_BRANCH]
 #define TARGET_OPT_AGU ix86_tune_features[X86_TUNE_OPT_AGU]
+#define TARGET_VECTORIZE_DOUBLE \
+	ix86_tune_features[X86_TUNE_VECTORIZE_DOUBLE]
 
 /* Feature tests against the various architecture variations.  */
 enum ix86_arch_indices {
@@ -1030,15 +1033,7 @@ enum target_cpu_default
    || (MODE) == V2SImode || (MODE) == SImode				\
    || (MODE) == V4HImode || (MODE) == V8QImode)
 
-/* ??? No autovectorization into MMX or 3DNOW until we can reliably
-   place emms and femms instructions.
-   FIXME: AVX has 32byte floating point vector operations and 16byte
-   integer vector operations.  But vectorizer doesn't support
-   different sizes for integer and floating point vectors.  We limit
-   vector size to 16byte.  */
-#define UNITS_PER_SIMD_WORD(MODE)					\
-  (TARGET_AVX ? (((MODE) == DFmode || (MODE) == SFmode) ? 16 : 16)	\
-   	      : (TARGET_SSE ? 16 : UNITS_PER_WORD))
+#define UNITS_PER_SIMD_WORD(MODE) ix86_units_per_simd_word (MODE)
 
 #define VALID_DFP_MODE_P(MODE) \
   ((MODE) == SDmode || (MODE) == DDmode || (MODE) == TDmode)

gcc/testsuite/ChangeLog

+2010-09-13  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* gcc.target/i386/fma4-256-vector.c: Add -mtune=generic.
+	* gcc.target/i386/fma4-vector.c: Likewise.
+	* gcc.target/i386/vectorize2.c: Likewise.
+	* gcc.target/i386/vectorize4.c: Likewise.
+	* gcc.target/i386/vectorize5.c: Likewise.
+	* gcc.target/i386/vectorize6.c: Likewise.
+	* gcc.target/i386/vectorize8.c: Likewise.
+
+	* gcc.target/i386/vect-double-1.c: New.
+	* gcc.target/i386/vect-double-1a.c: Likewise.
+	* gcc.target/i386/vect-double-2.c: Likewise.
+	* gcc.target/i386/vect-double-2a.c: Likewise.
+
+	* lib/target-supports.exp (check_effective_target_vect_double):
+	Set et_vect_double_saved to 0 when tuning for Atom.
+
 2010-09-13  Jan Hubicka  <jh@suse.cz>
 
 	* gcc.dg/torture/pr23821.c: Drop static keyword.

gcc/testsuite/gcc.target/i386/fma4-256-vector.c

@@ -3,7 +3,7 @@
 
 /* { dg-do compile } */
 /* { dg-require-effective-target lp64 } */
-/* { dg-options "-O2 -mfma4 -ftree-vectorize" } */
+/* { dg-options "-O2 -mfma4 -ftree-vectorize -mtune=generic" } */
 
 extern void exit (int);
 

gcc/testsuite/gcc.target/i386/fma4-vector.c

@@ -3,7 +3,7 @@
 
 /* { dg-do compile } */
 /* { dg-require-effective-target lp64 } */
-/* { dg-options "-O2 -mfma4 -ftree-vectorize" } */
+/* { dg-options "-O2 -mfma4 -ftree-vectorize -mtune=generic" } */
 
 extern void exit (int);
 

gcc/testsuite/gcc.target/i386/vect-double-1.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -ftree-vectorize -mfpmath=sse -march=core2 -fdump-tree-vect-stats" } */
+
+extern void abort (void);
+
+#ifndef STATIC
+#define STATIC
+#endif
+
+#define N 16
+ 
+double cb[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45};
+double ca[N];
+
+STATIC void
+__attribute__ ((noinline))
+sse2_test (void)
+{  
+  int i;
+
+  for (i = 0; i < N; i++)
+    {
+      ca[i] = cb[i];
+    }
+
+  /* check results:  */
+  for (i = 0; i < N; i++)
+    {
+      if (ca[i] != cb[i])
+        abort ();
+    }
+}
+
+/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
+/* { dg-final { cleanup-tree-dump "vect" } } */

gcc/testsuite/gcc.target/i386/vect-double-1a.c

+/* { dg-do run } */
+/* { dg-require-effective-target sse2 } */
+/* { dg-options "-O2 -ftree-vectorize -mfpmath=sse -msse2 -mtune=core2" } */
+
+#define STATIC static
+
+#include "vect-double-1.c"
+#include "sse2-check.h"

gcc/testsuite/gcc.target/i386/vect-double-2.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -ftree-vectorize -mfpmath=sse -msse2 -mtune=atom -fdump-tree-vect-stats" } */
+
+extern void abort (void);
+
+#ifndef STATIC
+#define STATIC
+#endif
+
+#define N 16
+ 
+double cb[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45};
+double ca[N];
+
+STATIC void
+__attribute__ ((noinline))
+sse2_test (void)
+{  
+  int i;
+
+  for (i = 0; i < N; i++)
+    {
+      ca[i] = cb[i];
+    }
+
+  /* check results:  */
+  for (i = 0; i < N; i++)
+    {
+      if (ca[i] != cb[i])
+        abort ();
+    }
+}
+
+/* { dg-final { scan-tree-dump-not "vectorized 1 loops" "vect" } } */
+/* { dg-final { cleanup-tree-dump "vect" } } */

gcc/testsuite/gcc.target/i386/vect-double-2a.c

+/* { dg-do run } */
+/* { dg-require-effective-target sse2 } */
+/* { dg-options "-O2 -ftree-vectorize -mfpmath=sse -msse2 -mtune=atom" } */
+
+#define STATIC static
+
+#include "vect-double-2.c"
+#include "sse2-check.h"

gcc/testsuite/gcc.target/i386/vectorize2.c

 /* { dg-do compile } */
 /* { dg-require-effective-target ilp32 } */
-/* { dg-options "-O2 -ffast-math -ftree-vectorize -msse2 -mfpmath=sse" } */
+/* { dg-options "-O2 -ffast-math -ftree-vectorize -msse2 -mfpmath=sse -mtune=generic" } */
 
 double a[256];
 int b[256];

gcc/testsuite/gcc.target/i386/vectorize4.c

 /* { dg-do compile } */
 /* { dg-require-effective-target ilp32 } */
-/* { dg-options "-O2 -ffast-math -ftree-vectorize -msse2 --param ggc-min-expand=0 --param ggc-min-heapsize=0" } */
+/* { dg-options "-O2 -ffast-math -ftree-vectorize -msse2 -mtune=generic --param ggc-min-expand=0 --param ggc-min-heapsize=0" } */
 /* This test, tests two thing, we vectorize square root and also we don't crash due to a GC issue.  */
 
 

gcc/testsuite/gcc.target/i386/vectorize5.c

 /* { dg-do compile } */
 /* { dg-require-effective-target lp64 } */
-/* { dg-options "-O2 -ftree-vectorize -mveclibabi=acml -ffast-math" } */
+/* { dg-options "-O2 -ftree-vectorize -mveclibabi=acml -ffast-math -mtune=generic" } */
 
 double x[256];
 

gcc/testsuite/gcc.target/i386/vectorize6.c

 /* { dg-do compile } */
-/* { dg-options "-O2 -msse2 -ftree-vectorize -mveclibabi=svml -ffast-math" } */
+/* { dg-options "-O2 -msse2 -ftree-vectorize -mveclibabi=svml -ffast-math -mtune=generic" } */
 
 double x[256];
 

gcc/testsuite/gcc.target/i386/vectorize8.c

 /* { dg-do compile } */
-/* { dg-options "-O2 -ftree-vectorize -msse2" } */
+/* { dg-options "-O2 -ftree-vectorize -msse2 -mtune=generic" } */
 
 unsigned int a[256];
 double b[256];

gcc/testsuite/lib/target-supports.exp

@@ -2309,8 +2309,17 @@ proc check_effective_target_vect_double { } {
     } else {
 	set et_vect_double_saved 0
 	if { [istarget i?86-*-*]
-	      || [istarget x86_64-*-*] 
-	      || [istarget spu-*-*] } {
+	      || [istarget x86_64-*-*] } {
+	   if { [check_no_compiler_messages vect_double assembly {
+		 #ifdef __tune_atom__
+		 # error No double vectorizer support.
+		 #endif
+		}] } {
+		set et_vect_double_saved 1
+	    } else {
+		set et_vect_double_saved 0
+	    }
+	} elseif { [istarget spu-*-*] } {
 	   set et_vect_double_saved 1
 	}
     }