diff options
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index c9736e5..c922c86 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -6574,7 +6574,8 @@ force_to_mode (x, mode, mask, reg, just_select) x = gen_binary (LSHIFTRT, GET_MODE (x), XEXP (x, 0), GEN_INT (GET_MODE_BITSIZE (GET_MODE (x)) - exact_log2 (mask + 1))); - break; + + goto shiftrt; case ASHIFTRT: /* If we are just looking for the sign bit, we don't need this shift at @@ -6639,7 +6640,9 @@ force_to_mode (x, mode, mask, reg, just_select) if (mask == 1) x = gen_binary (LSHIFTRT, GET_MODE (x), XEXP (x, 0), XEXP (x, 1)); - /* If this is a sign-extension operation that just affects bits + shiftrt: + + /* If this is a zero- or sign-extension operation that just affects bits we don't care about, remove it. Be sure the call above returned something that is still a shift. */ |