diff options
| author | Stephen L Moshier <moshier@world.std.com> | 1998-09-09 16:33:06 -0600 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1998-09-09 16:33:06 -0600 |
| commit | 7e3e369cdfd8ae1811cb4780c69453c3bc62fb58 (patch) | |
| tree | 7296625fefa2578e5937d864be4e3a3207a9ccde /gcc | |
| parent | 520c987d6a324cc51d09e3cda47afbf7f51a5ee6 (diff) | |
| download | gcc-7e3e369cdfd8ae1811cb4780c69453c3bc62fb58.zip gcc-7e3e369cdfd8ae1811cb4780c69453c3bc62fb58.tar.gz gcc-7e3e369cdfd8ae1811cb4780c69453c3bc62fb58.tar.bz2 | |
emit-rtl.c (gen_lowpart_common): Disable optimization of initialized float-int union if the value is a NaN.
* emit-rtl.c (gen_lowpart_common): Disable optimization of
initialized float-int union if the value is a NaN.
From-SVN: r22371
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/emit-rtl.c | 5 |
2 files changed, 10 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 79c7c84..9dcc189 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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 diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c index d5ed392..a59437b 100644 --- a/gcc/emit-rtl.c +++ b/gcc/emit-rtl.c @@ -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 |