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emit-rtl.c (init_emit_once): Zero unused memory in a CONST_DOUBLE. 

* emit-rtl.c (init_emit_once): Zero unused memory in a
        CONST_DOUBLE.

From-SVN: r42423
This commit is contained in:
Richard Henderson 2001-05-21 23:29:39 -07:00 committed by Richard Henderson
parent 9ea659ac82
commit d425c5b05f
2 changed files with 13 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2001-05-21 Richard Henderson <rth@redhat.com>
* emit-rtl.c (init_emit_once): Zero unused memory in a
CONST_DOUBLE.
2001-05-21 Mark Mitchell <mark@codesourcery.com>
* tree.h (type_num_arguments): Declare it.

9
gcc/emit-rtl.c
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@ -4336,9 +4336,16 @@ init_emit_once (line_numbers)
rtx tem = rtx_alloc (CONST_DOUBLE);
union real_extract u;
memset ((char *) &u, 0, sizeof u); /* Zero any holes in a structure. */
/* Zero any holes in a structure. */
memset ((char *) &u, 0, sizeof u);
u.d = i == 0 ? dconst0 : i == 1 ? dconst1 : dconst2;
/* Avoid trailing garbage in the rtx. */
if (sizeof (u) < sizeof (HOST_WIDE_INT))
CONST_DOUBLE_LOW (tem) = 0;
if (sizeof (u) < 2 * sizeof (HOST_WIDE_INT))
CONST_DOUBLE_HIGH (tem) = 0;
memcpy (&CONST_DOUBLE_LOW (tem), &u, sizeof u);
CONST_DOUBLE_MEM (tem) = cc0_rtx;
CONST_DOUBLE_CHAIN (tem) = NULL_RTX;