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emit-rtl.c (gen_lowpart_common): Disable optimization of initialized float-int union if the value is a NaN.

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* emit-rtl.c (gen_lowpart_common): Disable optimization of
        initialized float-int union if the value is a NaN.

From-SVN: r22371
This commit is contained in:
Stephen L Moshier 1998-09-09 16:33:06 -06:00 committed by Jeff Law
parent 520c987d6a
commit 7e3e369cdf
2 changed files with 10 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
Wed Sep 9 23:31:36 1998 (Stephen L Moshier) <moshier@world.std.com>
* emit-rtl.c (gen_lowpart_common): Disable optimization of
initialized float-int union if the value is a NaN.
Wed Sep 9 23:00:48 1998 Nathan Sidwell <nathan@acm.org>
* c-lex.c (real_yylex): Don't warn about long long constants if

5
gcc/emit-rtl.c
View File

@ -774,6 +774,9 @@ gen_lowpart_common (mode, x)
i = INTVAL (x);
r = REAL_VALUE_FROM_TARGET_SINGLE (i);
/* Avoid changing the bit pattern of a NaN. */
if (REAL_VALUE_ISNAN (r))
return 0;
return CONST_DOUBLE_FROM_REAL_VALUE (r, mode);
}
#else
@ -812,6 +815,8 @@ gen_lowpart_common (mode, x)
i[0] = low, i[1] = high;
r = REAL_VALUE_FROM_TARGET_DOUBLE (i);
if (REAL_VALUE_ISNAN (r))
return 0;
return CONST_DOUBLE_FROM_REAL_VALUE (r, mode);
}
#else