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varasm.c (build_constant_desc): Don't share RTL in pool entries.

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* varasm.c (build_constant_desc): Don't share RTL in pool entries.
	
	* gcc.target/m68k/20090709-1.c: New.

From-SVN: r149426
This commit is contained in:
Maxim Kuvyrkov 2009-07-09 18:09:23 +00:00 committed by Maxim Kuvyrkov
parent 8d4cf6d7c3
commit 5223c58852
4 changed files with 31 additions and 0 deletions

3
gcc/ChangeLog

@ -1,3 +1,6 @@
2009-07-09 Maxim Kuvyrkov <maxim@codesourcery.com>
* varasm.c (build_constant_desc): Don't share RTL in pool entries.
2009-07-09 Basile Starynkevitch <basile@starynkevitch.net>

4
gcc/testsuite/ChangeLog

@ -1,3 +1,7 @@
2009-07-09 Maxim Kuvyrkov <maxim@codesourcery.com>
* gcc.target/m68k/20090709-1.c: New.
2009-07-09 Dodji Seketeli <dodji@redhat.com>
PR c++/40684

20
gcc/testsuite/gcc.dg/20090709-1.c Normal file

@ -0,0 +1,20 @@
/* { dg-do compile } */
/* There should be 3 occurrences of .LC0 in the code:
one for the definition of "0",
one for use in test1() and
one for use in test2().
FIXME: At the moment m68k GCC does not optimize test1() to nop
for some reason. */
/* { dg-final { scan-assembler-times ".LC0" 3 } } */
void dummy(char *arg);
void test1(void)
{
char tmp[2] = "0";
}
void test2(void)
{
dummy("0");
}

4
gcc/varasm.c

@ -3208,6 +3208,10 @@ build_constant_desc (tree exp)
set_mem_alias_set (rtl, 0);
set_mem_alias_set (rtl, const_alias_set);
/* We cannot share RTX'es in pool entries.
Mark this piece of RTL as required for unsharing. */
RTX_FLAG (rtl, used) = 1;
/* Set flags or add text to the name to record information, such as
that it is a local symbol. If the name is changed, the macro
ASM_OUTPUT_LABELREF will have to know how to strip this