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* numeric.c (int_pow, fix_mul): Avoid optimization bugs of

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clang.  Submitted by Wataru Kimura [Bug #6796].


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@36546 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
knu 2012-07-27 04:12:08 +00:00
parent 9de0a76ab2
commit 3b6affb067
2 changed files with 9 additions and 4 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Fri Jul 27 13:04:31 2012 Akinori MUSHA <knu@iDaemons.org>
* numeric.c (int_pow, fix_mul): Avoid optimization bugs of
clang. Submitted by Wataru Kimura [Bug #6796].
Fri Jun 29 21:19:36 2012 Nobuyoshi Nakada <nobu@ruby-lang.org>
* eval.c (stack_extend): prevent ALLOCA_N, which reserves a memory

8
numeric.c
View file

@ -2162,7 +2162,7 @@ fix_mul(x, y)
VALUE x, y;
{
if (FIXNUM_P(y)) {
#ifdef __HP_cc
#if defined(__HP_cc) || defined(__clang__)
/* avoids an optimization bug of HP aC++/ANSI C B3910B A.06.05 [Jul 25 2005] */
volatile
#endif
@ -2320,9 +2320,9 @@ int_pow(x, y)
y &= ~1;
do {
while (y % 2 == 0) {
long x2 = x * x;
volatile long x2 = x * x;
if (x2/x != x || !POSFIXABLE(x2)) {
VALUE v;
volatile VALUE v;
bignum:
v = rb_big_pow(rb_int2big(x), LONG2NUM(y));
if (z != 1) v = rb_big_mul(rb_int2big(neg ? -z : z), v);
@ -2332,7 +2332,7 @@ int_pow(x, y)
y >>= 1;
}
{
long xz = x * z;
volatile long xz = x * z;
if (!POSFIXABLE(xz) || xz / x != z) {
goto bignum;
}