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| author | Jim Wilson <wilson@gcc.gnu.org> | 1996-06-27 15:48:57 -0700 |
|---|---|---|
| committer | Jim Wilson <wilson@gcc.gnu.org> | 1996-06-27 15:48:57 -0700 |
| commit | f8fe20b224e983e7cb930a04ed6b574cf0f01d60 (patch) | |
| tree | 262c8eaaa5b7af2cbe3f352509870fc5b5c79b14 /gcc/expmed.c | |
| parent | 7e99e4948d47de46cc8463e743ca1fe7a25b47f4 (diff) | |
| download | gcc-f8fe20b224e983e7cb930a04ed6b574cf0f01d60.tar.gz | |
(extract_bit_field): Check TRULY_NOOP_TRUNCATION before
making a SUBREG of a REG.
From-SVN: r12338
Diffstat (limited to 'gcc/expmed.c')
| -rw-r--r-- | gcc/expmed.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/expmed.c b/gcc/expmed.c index be27f855ae8..a5939423034 100644 --- a/gcc/expmed.c +++ b/gcc/expmed.c @@ -928,7 +928,9 @@ extract_bit_field (str_rtx, bitsize, bitnum, unsignedp, So too extracting a subword value in the least significant part of the register. */ - if ((GET_CODE (op0) == REG + if (((GET_CODE (op0) == REG + && TRULY_NOOP_TRUNCATION (GET_MODE_BITSIZE (mode), + GET_MODE_BITSIZE (GET_MODE (op0)))) || (GET_CODE (op0) == MEM && (! SLOW_UNALIGNED_ACCESS || (offset * BITS_PER_UNIT % bitsize == 0 |