diff options
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/expmed.c | 15 |
2 files changed, 14 insertions, 5 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 275d6c73483..a8f99531492 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +Mon Dec 15 18:40:08 1997 Richard Henderson <rth@cygnus.com> + + * expmed.c (expand_shift): If SHIFT_COUNT_TRUNCATED, drop a SUBREG. + Mon Dec 15 18:31:43 1997 Richard Henderson <rth@cygnus.com> * alpha.c (alpha_cpu_name): New variable. diff --git a/gcc/expmed.c b/gcc/expmed.c index 8170c26b7cc..fba7182e305 100644 --- a/gcc/expmed.c +++ b/gcc/expmed.c @@ -1752,11 +1752,16 @@ expand_shift (code, mode, shifted, amount, target, unsignedp) op1 = expand_expr (amount, NULL_RTX, VOIDmode, 0); #ifdef SHIFT_COUNT_TRUNCATED - if (SHIFT_COUNT_TRUNCATED - && GET_CODE (op1) == CONST_INT - && (unsigned HOST_WIDE_INT) INTVAL (op1) >= GET_MODE_BITSIZE (mode)) - op1 = GEN_INT ((unsigned HOST_WIDE_INT) INTVAL (op1) - % GET_MODE_BITSIZE (mode)); + if (SHIFT_COUNT_TRUNCATED) + { + if (GET_CODE (op1) == CONST_INT + && (unsigned HOST_WIDE_INT) INTVAL (op1) >= GET_MODE_BITSIZE (mode)) + op1 = GEN_INT ((unsigned HOST_WIDE_INT) INTVAL (op1) + % GET_MODE_BITSIZE (mode)); + else if (GET_CODE (op1) == SUBREG + && SUBREG_WORD (op1) == 0) + op1 = SUBREG_REG (op1); + } #endif if (op1 == const0_rtx) |