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| author | Jakub Jelinek <jakub@gcc.gnu.org> | 2019-02-15 00:10:47 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2019-02-15 00:10:47 +0100 |
| commit | dddd0c7a5b751f398cba325dc7310bb185fed201 (patch) | |
| tree | 41cceb5e2419961df17e3ef8936879161cdc9e6c /gcc/combine.c | |
| parent | bf36afbc8f680205f04f75f308b994cff75fd54d (diff) | |
| download | gcc-dddd0c7a5b751f398cba325dc7310bb185fed201.zip gcc-dddd0c7a5b751f398cba325dc7310bb185fed201.tar.gz gcc-dddd0c7a5b751f398cba325dc7310bb185fed201.tar.bz2 | |
re PR rtl-optimization/89354 (Combine pass yields wrong code with -O2 and -msse2 for 32bit target)
PR rtl-optimization/89354
* combine.c (make_extraction): Punt if extraction_mode is narrower
than len bits.
* gcc.dg/pr89354.c: New test.
From-SVN: r268913
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index a249248..91e32c8 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -7830,6 +7830,10 @@ make_extraction (machine_mode mode, rtx inner, HOST_WIDE_INT pos, && partial_subreg_p (extraction_mode, mode)) extraction_mode = mode; + /* Punt if len is too large for extraction_mode. */ + if (maybe_gt (len, GET_MODE_PRECISION (extraction_mode))) + return NULL_RTX; + if (!MEM_P (inner)) wanted_inner_mode = wanted_inner_reg_mode; else |