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dwarf2out.c (reference_to_unused): Don't emit strings in initializers just because of debug information.

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gcc/ChangeLog:
* dwarf2out.c (reference_to_unused): Don't emit strings in
initializers just because of debug information.
* tree.h (TREE_ASM_WRITTEN): Document use for STRING_CSTs.
gcc/testsuite/ChangeLog:
* gcc.dg/debug/const-3.c: New.

From-SVN: r130959
This commit is contained in:
Alexandre Oliva 2007-12-15 20:16:03 +00:00 • committed by Alexandre Oliva
parent 4b516b14ba
commit d2f08d9879
5 changed files with 21 additions and 2 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2007-12-15 Alexandre Oliva <aoliva@redhat.com>
* dwarf2out.c (reference_to_unused): Don't emit strings in
initializers just because of debug information.
* tree.h (TREE_ASM_WRITTEN): Document use for STRING_CSTs.
2007-12-15 Sebastian Pop <sebastian.pop@amd.com>
* tree-scalar-evolution.c (number_of_iterations_for_all_loops): Replace

2
gcc/dwarf2out.c
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@ -10365,6 +10365,8 @@ reference_to_unused (tree * tp, int * walk_subtrees,
if (!node->output)
return *tp;
}
else if (TREE_CODE (*tp) == STRING_CST && !TREE_ASM_WRITTEN (*tp))
return *tp;
return NULL_TREE;
}

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2007-12-15 Alexandre Oliva <aoliva@redhat.com>
* gcc.dg/debug/const-3.c: New.
2007-12-15 John David Anglin <dave.anglin@nrc-cnrc.gc.ca>
* g++.dg/other/datasec1.C: Require named section support.

7
gcc/testsuite/gcc.dg/debug/const-3.c Normal file
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@ -0,0 +1,7 @@
/* Make sure we don't emit strings just because of debug information
for string initializers. */
/* { dg-do compile } */
/* { dg-options "-O2 -g" } */
/* { dg-final { scan-assembler-not "dontgenerate" } } */
static const char *p = "dontgenerate1";
static const char *q[2] = { 0, "dontgenerate2" };

4
gcc/tree.h
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@ -546,7 +546,7 @@ struct gimple_stmt GTY(())
TREE_ASM_WRITTEN in
VAR_DECL, FUNCTION_DECL, RECORD_TYPE, UNION_TYPE, QUAL_UNION_TYPE
BLOCK, SSA_NAME
BLOCK, SSA_NAME, STRING_CST
used_flag:
@ -1300,7 +1300,7 @@ extern void omp_clause_range_check_failed (const_tree, const char *, int,
/* In integral and pointer types, means an unsigned type. */
#define TYPE_UNSIGNED(NODE) (TYPE_CHECK (NODE)->base.unsigned_flag)
/* Nonzero in a VAR_DECL means assembler code has been written.
/* Nonzero in a VAR_DECL or STRING_CST means assembler code has been written.
Nonzero in a FUNCTION_DECL means that the function has been compiled.
This is interesting in an inline function, since it might not need
to be compiled separately.