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| author | Thomas Koenig <tkoenig@gcc.gnu.org> | 2013-04-30 21:45:13 +0000 |
|---|---|---|
| committer | Thomas Koenig <tkoenig@gcc.gnu.org> | 2013-04-30 21:45:13 +0000 |
| commit | 068b04fe4cd176294f6110c6dca28d24e65d6121 (patch) | |
| tree | efd1bbd12f3f9ffed58a0089a798e89c2ca28db9 /gcc/fortran/frontend-passes.c | |
| parent | dc4ea06f6aaf6d964b8ef74be45a9e79c2f1f805 (diff) | |
| download | gcc-068b04fe4cd176294f6110c6dca28d24e65d6121.zip gcc-068b04fe4cd176294f6110c6dca28d24e65d6121.tar.gz gcc-068b04fe4cd176294f6110c6dca28d24e65d6121.tar.bz2 | |
re PR fortran/57071 (Optimize (-1)**k to 1 - 2 * mod(K, 2))
2013-04-30 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/57071
* frontend-passes.c (optimize_power): Simplify
1**k to 1.
2013-04-30 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/57071
* gfortran.dg/power_5.f90: New test.
From-SVN: r198476
Diffstat (limited to 'gcc/fortran/frontend-passes.c')
| -rw-r--r-- | gcc/fortran/frontend-passes.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/fortran/frontend-passes.c b/gcc/fortran/frontend-passes.c index 63efb9f..a2e88b4 100644 --- a/gcc/fortran/frontend-passes.c +++ b/gcc/fortran/frontend-passes.c @@ -1148,6 +1148,24 @@ optimize_power (gfc_expr *e) *e = *ishft; return true; } + + else if (mpz_cmp_si (op1->value.integer, 1L) == 0) + { + op2 = e->value.op.op2; + if (op2 == NULL) + return false; + + gfc_free_expr (op1); + gfc_free_expr (op2); + + e->expr_type = EXPR_CONSTANT; + e->value.op.op1 = NULL; + e->value.op.op2 = NULL; + mpz_init_set_si (e->value.integer, 1); + /* Typespec cand location are still OK. */ + return true; + } + return false; } |