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| author | Dale Johannesen <dalej@apple.com> | 2002-09-19 18:54:56 +0000 |
|---|---|---|
| committer | Dale Johannesen <dalej@gcc.gnu.org> | 2002-09-19 18:54:56 +0000 |
| commit | 307f767b38f6eda4a780e4e215d85db213d93e29 (patch) | |
| tree | 270549d85262425a9fa64b04afb48d51d3f798c0 /gcc/combine.c | |
| parent | 8d87f295065906d0ce705dfc7147bbf7cbb8970d (diff) | |
| download | gcc-307f767b38f6eda4a780e4e215d85db213d93e29.zip gcc-307f767b38f6eda4a780e4e215d85db213d93e29.tar.gz gcc-307f767b38f6eda4a780e4e215d85db213d93e29.tar.bz2 | |
Remove creation of invalid subreg. PR 7705, 7339, 7720.
From-SVN: r57315
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index e151881..c72d81e 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -6124,6 +6124,11 @@ make_extraction (mode, inner, pos, pos_rtx, len, final_word += (GET_MODE_SIZE (inner_mode) - GET_MODE_SIZE (tmode)) % UNITS_PER_WORD; + /* Avoid creating invalid subregs, for example when + simplifying (x>>32)&255. */ + if (final_word >= GET_MODE_SIZE (inner_mode)) + return NULL_RTX; + new = gen_rtx_SUBREG (tmode, inner, final_word); } else |