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re PR tree-optimization/35402 (Store CCP will not inline static const variable which is default initialized)

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2008-03-06  Andrew Pinski  <andrew_pinski@playstation.sony.com>

        PR tree-opt/35402
        * tree-ssa-ccp.c (get_symbol_constant_value): Handle
        integral and scalar float variables which have a
        NULL DECL_INITIAL.

2008-03-06  Andrew Pinski  <andrew_pinski@playstation.sony.com>

        PR tree-opt/35402
        * gcc.dg/tree-ssa/ssa-store-ccp-1.c: New test.

From-SVN: r132991
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Andrew Pinski 2008-03-06 21:56:04 +00:00 • committed by Andrew Pinski
parent 39897cdcb0
commit b094015443
4 changed files with 32 additions and 0 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2008-03-06 Andrew Pinski <andrew_pinski@playstation.sony.com>
PR tree-opt/35402
* tree-ssa-ccp.c (get_symbol_constant_value): Handle
integral and scalar float variables which have a
NULL DECL_INITIAL.
2008-03-06 Nathan Froyd <froydnj@codesourcery.com>
* dwarf2out.c (dwarf2out_frame_debug_expr): Consult the

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2008-03-06 Andrew Pinski <andrew_pinski@playstation.sony.com>
PR tree-opt/35402
* gcc.dg/tree-ssa/ssa-store-ccp-1.c: New test.
2008-03-06 Markus Milleder <markus.milleder@generali.at>
PR preprocessor/35458

14
gcc/testsuite/gcc.dg/tree-ssa/ssa-store-ccp-1.c Normal file
View file

@ -0,0 +1,14 @@
/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-optimized" } */
static const int conststaticvariable;
int f(void)
{
return conststaticvariable;
}
/* There should be no reference to conststaticvariable as we should have
inlined the 0. */
/* { dg-final { scan-tree-dump-times "conststaticvariable" 0 "optimized"} } */
/* { dg-final { cleanup-tree-dump "optimized" } } */

6
gcc/tree-ssa-ccp.c
View file

@ -306,6 +306,12 @@ get_symbol_constant_value (tree sym)
if (val
&& ccp_decl_initial_min_invariant (val))
return val;
/* Variables declared 'const' without an initializer
have zero as the intializer. */
if (!val
&& (INTEGRAL_TYPE_P (TREE_TYPE (sym))
|| SCALAR_FLOAT_TYPE_P (TREE_TYPE (sym))))
return fold_convert (TREE_TYPE (sym), integer_zero_node);
}
return NULL_TREE;