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| author | Richard Stallman <rms@gnu.org> | 1992-08-31 08:02:58 +0000 |
|---|---|---|
| committer | Richard Stallman <rms@gnu.org> | 1992-08-31 08:02:58 +0000 |
| commit | 812dd8a30d0b036bffca9780cfdef45d934d8558 (patch) | |
| tree | f79651b3ca22363f52598cb6699e028005a98ec4 /gcc | |
| parent | 8c2bf92af150355c9bf356fd57a0a4438bdeb2d4 (diff) | |
| download | gcc-812dd8a30d0b036bffca9780cfdef45d934d8558.zip gcc-812dd8a30d0b036bffca9780cfdef45d934d8558.tar.gz gcc-812dd8a30d0b036bffca9780cfdef45d934d8558.tar.bz2 | |
(const_binop): Delete special case for mult by 3.
From-SVN: r2002
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/fold-const.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 069c503..b3564de 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -1073,7 +1073,7 @@ const_binop (code, arg1, arg2) break; case MULT_EXPR: - /* Optimize simple cases. */ + /* Optimize simple cases. */ if (int1h == 0) { unsigned HOST_WIDE_INT temp; @@ -1091,11 +1091,13 @@ const_binop (code, arg1, arg2) int2h = int2h * 2 + (temp < int2l); t = build_int_2 (temp, int2h); goto got_it; +#if 0 /* This code can lose carries. */ case 3: temp = int2l + int2l + int2l; int2h = int2h * 3 + (temp < int2l); t = build_int_2 (temp, int2h); goto got_it; +#endif case 4: temp = int2l + int2l; int2h = int2h * 4 + ((temp < int2l) << 1); |