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| author | Bin Cheng <bin.cheng@arm.com> | 2017-08-01 09:17:29 +0000 |
|---|---|---|
| committer | Bin Cheng <amker@gcc.gnu.org> | 2017-08-01 09:17:29 +0000 |
| commit | 39637a44f4d65ccb23f83399eefd5f06d4bf4e4a (patch) | |
| tree | 73e73febf0baa3141fc54e81b74d95b207ef2b7c /gcc/tree-predcom.c | |
| parent | f9c5fe06f992ba29fccf7b3a15f5424b9ff254ce (diff) | |
| download | gcc-39637a44f4d65ccb23f83399eefd5f06d4bf4e4a.zip gcc-39637a44f4d65ccb23f83399eefd5f06d4bf4e4a.tar.gz gcc-39637a44f4d65ccb23f83399eefd5f06d4bf4e4a.tar.bz2 | |
re PR tree-optimization/81620 (ICE in is_inv_store_elimination_chain, at tree-predcom.c:1651 with -O3)
PR tree-optimization/81620
* tree-predcom.c (add_ref_to_chain): Don't set has_max_use_after
for store-store chain.
gcc/testsuite
* gcc.dg/tree-ssa/pr81620-1.c: New.
* gcc.dg/tree-ssa/pr81620-2.c: New.
From-SVN: r250763
Diffstat (limited to 'gcc/tree-predcom.c')
| -rw-r--r-- | gcc/tree-predcom.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/tree-predcom.c b/gcc/tree-predcom.c index a4011bf..f7a57a4 100644 --- a/gcc/tree-predcom.c +++ b/gcc/tree-predcom.c @@ -1069,7 +1069,9 @@ add_ref_to_chain (chain_p chain, dref ref) chain->has_max_use_after = false; } - if (ref->distance == chain->length + /* Don't set the flag for store-store chain since there is no use. */ + if (chain->type != CT_STORE_STORE + && ref->distance == chain->length && ref->pos > root->pos) chain->has_max_use_after = true; |