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| author | Richard Biener <rguenther@suse.de> | 2017-01-27 12:24:54 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2017-01-27 12:24:54 +0000 |
| commit | 38f50ab65ae67aa9896ca7a18a80d77b4648a0b0 (patch) | |
| tree | 52e855ee28a86a77ff9ed38d8d896098328986c8 /gcc/tree-vrp.c | |
| parent | c04f41398e6ec418907dc8e7f4a761345ac23a74 (diff) | |
| download | gcc-38f50ab65ae67aa9896ca7a18a80d77b4648a0b0.zip gcc-38f50ab65ae67aa9896ca7a18a80d77b4648a0b0.tar.gz gcc-38f50ab65ae67aa9896ca7a18a80d77b4648a0b0.tar.bz2 | |
re PR tree-optimization/79244 (ice in replace_uses_by, at tree-cfg.c:1866)
2017-01-27 Richard Biener <rguenther@suse.de>
PR tree-optimization/79244
* tree-vrp.c (remove_range_assertions): Forcefully propagate
out SSA names even if abnormal.
* gcc.dg/torture/pr79244.c: New testcase.
From-SVN: r244973
Diffstat (limited to 'gcc/tree-vrp.c')
| -rw-r--r-- | gcc/tree-vrp.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/gcc/tree-vrp.c b/gcc/tree-vrp.c index d7d7a0d..e023244 100644 --- a/gcc/tree-vrp.c +++ b/gcc/tree-vrp.c @@ -6974,8 +6974,20 @@ remove_range_assertions (void) } } - /* Propagate the RHS into every use of the LHS. */ - replace_uses_by (lhs, var); + /* Propagate the RHS into every use of the LHS. For SSA names + also propagate abnormals as it merely restores the original + IL in this case (an replace_uses_by would assert). */ + if (TREE_CODE (var) == SSA_NAME) + { + imm_use_iterator iter; + use_operand_p use_p; + gimple *use_stmt; + FOR_EACH_IMM_USE_STMT (use_stmt, iter, lhs) + FOR_EACH_IMM_USE_ON_STMT (use_p, iter) + SET_USE (use_p, var); + } + else + replace_uses_by (lhs, var); /* And finally, remove the copy, it is not needed. */ gsi_remove (&si, true); |