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re PR c++/36912 (ICE with "-frounding-math -g")

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PR c++/36912
	* varasm.c (initializer_constant_valid_p): A PLUS_EXPR
	or MINUS_EXPR of REAL_TYPE is not a valid constant initializer.
	(output_constant): Avoid crash after error.

From-SVN: r153921
This commit is contained in:
Jason Merrill 2009-11-04 18:13:23 -05:00 committed by Jason Merrill
parent f4ecc8fd6b
commit e3503aa8cf
4 changed files with 23 additions and 2 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2009-11-04 Jason Merrill <jason@redhat.com>
PR c++/36912
* varasm.c (initializer_constant_valid_p): A PLUS_EXPR
or MINUS_EXPR of REAL_TYPE is not a valid constant initializer.
(output_constant): Avoid crash after error.
2009-11-04 Eric Botcazou <ebotcazou@adacore.com>
PR target/10127

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2009-11-04 Jason Merrill <jason@redhat.com>
PR c++/36912
* g++.dg/init/static-init2.C: New.
2009-11-04 Jason Merrill <jason@redhat.com>
PR c++/39413

3
gcc/testsuite/g++.dg/init/static-init2.C Normal file
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@ -0,0 +1,3 @@
// PR c++/36912
// { dg-options -frounding-math }
const double c = .1, d = c+1;

10
gcc/varasm.c
View File

@ -4322,6 +4322,10 @@ initializer_constant_valid_p (tree value, tree endtype)
case POINTER_PLUS_EXPR:
case PLUS_EXPR:
/* Any valid floating-point constants will have been folded by now;
with -frounding-math we hit this with addition of two constants. */
if (TREE_CODE (endtype) == REAL_TYPE)
return NULL_TREE;
if (! INTEGRAL_TYPE_P (endtype)
|| TYPE_PRECISION (endtype)
>= int_or_pointer_precision (TREE_TYPE (value)))
@ -4345,6 +4349,8 @@ initializer_constant_valid_p (tree value, tree endtype)
break;
case MINUS_EXPR:
if (TREE_CODE (endtype) == REAL_TYPE)
return NULL_TREE;
if (! INTEGRAL_TYPE_P (endtype)
|| TYPE_PRECISION (endtype)
>= int_or_pointer_precision (TREE_TYPE (value)))
@ -4560,8 +4566,8 @@ output_constant (tree exp, unsigned HOST_WIDE_INT size, unsigned int align)
case REAL_TYPE:
if (TREE_CODE (exp) != REAL_CST)
error ("initializer for floating value is not a floating constant");
assemble_real (TREE_REAL_CST (exp), TYPE_MODE (TREE_TYPE (exp)), align);
else
assemble_real (TREE_REAL_CST (exp), TYPE_MODE (TREE_TYPE (exp)), align);
break;
case COMPLEX_TYPE: