diff options
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index 2816a7e1e61..eb2aa3e6b34 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -3068,7 +3068,8 @@ expand_builtin_pow_root (location_t loc, tree arg0, tree arg1, tree type, if (REAL_VALUES_EQUAL (c, dconsthalf)) op = build_call_nofold_loc (loc, sqrtfn, 1, arg0); - else + /* Don't do this optimization if we don't have a sqrt insn. */ + else if (optab_handler (sqrt_optab, mode) != CODE_FOR_nothing) { REAL_VALUE_TYPE dconst1_4 = dconst1; REAL_VALUE_TYPE dconst3_4; @@ -3114,7 +3115,8 @@ expand_builtin_pow_root (location_t loc, tree arg0, tree arg1, tree type, op = build_call_nofold_loc (loc, cbrtfn, 1, arg0); /* Now try 1/6. */ - else if (optimize_insn_for_speed_p ()) + else if (optimize_insn_for_speed_p () + && optab_handler (sqrt_optab, mode) != CODE_FOR_nothing) { REAL_VALUE_TYPE dconst1_6 = dconst1_3; SET_REAL_EXP (&dconst1_6, REAL_EXP (&dconst1_6) - 1); |