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re PR tree-optimization/77621 (Internal compiler error for mtune=atom + msse2)

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PR target/77621
	* config/i386/i386.c (ix86_preferred_simd_mode) <case DFmode>:
	Don't return word_mode for !TARGET_VECTORIZE_DOUBLE.
	(ix86_add_stmt_cost): Penalize DFmode vector operations
	for !TARGET_VECTORIZE_DOUBLE.

testsuite/ChangeLog:

	PR target/77621
	* gcc.target/i386/pr77621.c: New test.
	* gcc.target/i386/vect-double-2.c: Update scan-tree-dump-times
	pattern, loop should vectorize with -mtune=atom.

From-SVN: r240277
This commit is contained in:
Uros Bizjak 2016-09-20 19:36:03 +02:00 committed by Uros Bizjak
parent b276eda4b4
commit 9b1ba33cf6
5 changed files with 35 additions and 5 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2016-09-20 Uros Bizjak <ubizjak@gmail.com>
PR target/77621
* config/i386/i386.c (ix86_preferred_simd_mode) <case DFmode>:
Don't return word_mode for !TARGET_VECTORIZE_DOUBLE.
(ix86_add_stmt_cost): Penalize DFmode vector operations
for !TARGET_VECTORIZE_DOUBLE.
2016-09-20 Gerald Pfeifer <gerald@pfeifer.com>
* doc/invoke.texi (Warning Options): Simplify language.

11
gcc/config/i386/i386.c
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@ -49554,9 +49554,7 @@ ix86_preferred_simd_mode (machine_mode mode)
return V4SFmode;
case DFmode:
if (!TARGET_VECTORIZE_DOUBLE)
return word_mode;
else if (TARGET_AVX512F)
if (TARGET_AVX512F)
return V8DFmode;
else if (TARGET_AVX && !TARGET_PREFER_AVX128)
return V4DFmode;
@ -49647,9 +49645,14 @@ ix86_add_stmt_cost (void *data, int count, enum vect_cost_for_stmt kind,
tree vectype = stmt_info ? stmt_vectype (stmt_info) : NULL_TREE;
int stmt_cost = ix86_builtin_vectorization_cost (kind, vectype, misalign);
/* Penalize DFmode vector operations for !TARGET_VECTORIZE_DOUBLE. */
if (kind == vector_stmt && !TARGET_VECTORIZE_DOUBLE
&& vectype && GET_MODE_INNER (TYPE_MODE (vectype)) == DFmode)
stmt_cost *= 5; /* FIXME: The value here is arbitrary. */
/* Statements in an inner loop relative to the loop being
vectorized are weighted more heavily. The value here is
arbitrary and could potentially be improved with analysis. */
arbitrary and could potentially be improved with analysis. */
if (where == vect_body && stmt_info && stmt_in_inner_loop_p (stmt_info))
count *= 50; /* FIXME. */

7
gcc/testsuite/ChangeLog
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@ -1,3 +1,10 @@
2016-09-20 Uros Bizjak <ubizjak@gmail.com>
PR target/77621
* gcc.target/i386/pr77621.c: New test.
* gcc.target/i386/vect-double-2.c: Update scan-tree-dump-times
pattern, loop should vectorize with -mtune=atom.
2016-09-20 Maxim Ostapenko <m.ostapenko@samsung.com>
Jakub Jelinek <jakub@redhat.com>

12
gcc/testsuite/gcc.target/i386/pr77621.c Normal file
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@ -0,0 +1,12 @@
/* { dg-do compile } */
/* { dg-options "-O3 -mtune=atom -msse2 -fdump-tree-vect-stats" } */
void
foo (double *x, int *y)
{
int i;
for (i = 0; i < 8; i++)
x[i] -= y[i] * x[i + 1];
}
/* { dg-final { scan-tree-dump-not "Vectorized loops: 1" "vect" } } */

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

@ -31,4 +31,4 @@ sse2_test (void)
}
}
/* { dg-final { scan-tree-dump-not "vectorized 1 loops" "vect" } } */
/* { dg-final { scan-tree-dump-times "Vectorized loops: 1" 1 "vect" } } */