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[simplify-rtx] Zero-initialise local array in simplify_immed_subreg 

* simplify-rtx.c (simplify_immed_subreg): Zero-initialize tmp array
	before merging in bytes to pass down to real_from_target.

From-SVN: r240866
This commit is contained in:
Kyrylo Tkachov 2016-10-07 14:47:55 +00:00 committed by Kyrylo Tkachov
parent d7f336f846
commit 125f0e39bf
2 changed files with 6 additions and 3 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2016-10-07 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
* simplify-rtx.c (simplify_immed_subreg): Zero-initialize tmp array
before merging in bytes to pass down to real_from_target.
2016-10-07 Richard Biener <rguenther@suse.de>
* tree-ssa-propagate.c (replace_phi_args_in): Remove no longer

4
gcc/simplify-rtx.c
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@ -5893,14 +5893,12 @@ simplify_immed_subreg (machine_mode outermode, rtx op,
case MODE_DECIMAL_FLOAT:
{
REAL_VALUE_TYPE r;
long tmp[MAX_BITSIZE_MODE_ANY_MODE / 32];
long tmp[MAX_BITSIZE_MODE_ANY_MODE / 32] = { 0 };
/* real_from_target wants its input in words affected by
FLOAT_WORDS_BIG_ENDIAN. However, we ignore this,
and use WORDS_BIG_ENDIAN instead; see the documentation
of SUBREG in rtl.texi. */
for (i = 0; i < max_bitsize / 32; i++)
tmp[i] = 0;
for (i = 0; i < elem_bitsize; i += value_bit)
{
int ibase;