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re PR tree-optimization/84841 (ICE: tree check: expected ssa_name, have real_cst in rewrite_expr_tree_parallel, at tree-ssa-reassoc.c:4624)

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PR tree-optimization/84841
	* tree-ssa-reassoc.c (INTEGER_CONST_TYPE): Change to 1 << 4 from
	1 << 3.
	(FLOAT_ONE_CONST_TYPE): Define.
	(constant_type): Return FLOAT_ONE_CONST_TYPE for -1.0 and 1.0.
	(sort_by_operand_rank): Put entries with higher constant_type last
	rather than first to match comments.

	* gcc.dg/pr84841.c: New test.

From-SVN: r258586
This commit is contained in:
Jakub Jelinek 2018-03-16 09:06:41 +01:00 committed by Jakub Jelinek
parent 828fd2fbe8
commit 7b9be7003d
4 changed files with 33 additions and 3 deletions
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10
gcc/ChangeLog
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@ -1,3 +1,13 @@
2018-03-16 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/84841
* tree-ssa-reassoc.c (INTEGER_CONST_TYPE): Change to 1 << 4 from
1 << 3.
(FLOAT_ONE_CONST_TYPE): Define.
(constant_type): Return FLOAT_ONE_CONST_TYPE for -1.0 and 1.0.
(sort_by_operand_rank): Put entries with higher constant_type last
rather than first to match comments.
2018-03-15 Sandra Loosemore <sandra@codesourcery.com>
* config/nios2/nios2.md (movsi_internal): Fix thinko in

3
gcc/testsuite/ChangeLog
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@ -1,5 +1,8 @@
2018-03-16 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/84841
* gcc.dg/pr84841.c: New test.
PR c++/84874
* g++.dg/cpp2a/desig7.C: New test.

9
gcc/testsuite/gcc.dg/pr84841.c Normal file
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@ -0,0 +1,9 @@
/* PR tree-optimization/84841 */
/* { dg-do compile } */
/* { dg-options "-O2 -fassociative-math -frounding-math -fno-signed-zeros -fno-trapping-math -fno-tree-forwprop" } */
double
foo (double x)
{
return -x * 0.1 * 0.1;
}

14
gcc/tree-ssa-reassoc.c
View File

@ -470,7 +470,8 @@ get_rank (tree e)
/* We want integer ones to end up last no matter what, since they are
the ones we can do the most with. */
#define INTEGER_CONST_TYPE 1 << 3
#define INTEGER_CONST_TYPE 1 << 4
#define FLOAT_ONE_CONST_TYPE 1 << 3
#define FLOAT_CONST_TYPE 1 << 2
#define OTHER_CONST_TYPE 1 << 1
@ -482,7 +483,14 @@ constant_type (tree t)
if (INTEGRAL_TYPE_P (TREE_TYPE (t)))
return INTEGER_CONST_TYPE;
else if (SCALAR_FLOAT_TYPE_P (TREE_TYPE (t)))
return FLOAT_CONST_TYPE;
{
/* Sort -1.0 and 1.0 constants last, while in some cases
const_binop can't optimize some inexact operations, multiplication
by -1.0 or 1.0 can be always merged with others. */
if (real_onep (t) || real_minus_onep (t))
return FLOAT_ONE_CONST_TYPE;
return FLOAT_CONST_TYPE;
}
else
return OTHER_CONST_TYPE;
}
@ -504,7 +512,7 @@ sort_by_operand_rank (const void *pa, const void *pb)
if (oea->rank == 0)
{
if (constant_type (oeb->op) != constant_type (oea->op))
return constant_type (oeb->op) - constant_type (oea->op);
return constant_type (oea->op) - constant_type (oeb->op);
else
/* To make sorting result stable, we use unique IDs to determine
order. */