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| author | dalej <dalej@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-09-19 18:54:56 +0000 |
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| committer | dalej <dalej@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-09-19 18:54:56 +0000 |
| commit | 3f7dbe8d71e43cbbf41f8f09049cdf36dea123a4 (patch) | |
| tree | 270549d85262425a9fa64b04afb48d51d3f798c0 /gcc | |
| parent | bd5d180582ec1a96440ca667885ec38df28b0c93 (diff) | |
| download | ppe42-gcc-3f7dbe8d71e43cbbf41f8f09049cdf36dea123a4.tar.gz ppe42-gcc-3f7dbe8d71e43cbbf41f8f09049cdf36dea123a4.zip | |
Remove creation of invalid subreg. PR 7705, 7339, 7720.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@57315 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/combine.c | 5 |
2 files changed, 9 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 083c12f32ac..9da276c6810 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +2002-09-19 Dale Johannesen <dalej@apple.com> + * combine.c (make_extraction): Don't create + invalid subreg. + 2002-09-19 Ulrich Weigand <uweigand@de.ibm.com> * config/s390/s390.c (addr_generation_dependency_p): Handle SUBREG diff --git a/gcc/combine.c b/gcc/combine.c index e1518817ca6..c72d81e891c 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 |
