diff options
Diffstat (limited to 'gcc/simplify-rtx.c')
| -rw-r--r-- | gcc/simplify-rtx.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index 4a8e3c6..847a4bb 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -1526,7 +1526,8 @@ simplify_const_unary_operation (enum rtx_code code, enum machine_mode mode, } else if (GET_CODE (op) == CONST_DOUBLE - && SCALAR_FLOAT_MODE_P (mode)) + && SCALAR_FLOAT_MODE_P (mode) + && SCALAR_FLOAT_MODE_P (GET_MODE (op))) { REAL_VALUE_TYPE d, t; REAL_VALUE_FROM_CONST_DOUBLE (d, op); @@ -1549,7 +1550,10 @@ simplify_const_unary_operation (enum rtx_code code, enum machine_mode mode, d = real_value_truncate (mode, d); break; case FLOAT_EXTEND: - /* All this does is change the mode. */ + /* All this does is change the mode, unless changing + mode class. */ + if (GET_MODE_CLASS (mode) != GET_MODE_CLASS (GET_MODE (op))) + real_convert (&d, mode, &d); break; case FIX: real_arithmetic (&d, FIX_TRUNC_EXPR, &d, NULL); |