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| author | Richard Stallman <rms@gnu.org> | 1992-10-31 21:16:47 +0000 |
|---|---|---|
| committer | Richard Stallman <rms@gnu.org> | 1992-10-31 21:16:47 +0000 |
| commit | f9e67232ef84bdb81faf1f70359c5d6f2ffcc2e9 (patch) | |
| tree | f02b4c72cfa09b61f143417f4be6bc1cd3e37ec1 /gcc/combine.c | |
| parent | 62c13b81f5a69a87f8ceb349d6d229ef4cb6e5a7 (diff) | |
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(simplify_shift_const):
For a subreg, require subreg_lowpart_p and not paradoxical.
From-SVN: r2664
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 5183508..3f90edb 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -6792,7 +6792,9 @@ simplify_shift_const (x, code, result_mode, varop, count) /* If VAROP is a SUBREG, strip it as long as the inner operand has the same number of words as what we've seen so far. Then store the widest mode in MODE. */ - if (SUBREG_WORD (varop) == 0 + if (subreg_lowpart_p (varop) + && (GET_MODE_SIZE (GET_MODE (SUBREG_REG (varop))) + > GET_MODE_SIZE (GET_MODE (varop))) && (((GET_MODE_SIZE (GET_MODE (SUBREG_REG (varop))) + (UNITS_PER_WORD - 1)) / UNITS_PER_WORD) == mode_words)) |