lim: Reset flow sensitive info even for pointers [PR103192]
authorJakub Jelinek <jakub@redhat.com>
Wed, 17 Nov 2021 13:18:42 +0000 (14:18 +0100)
committerJakub Jelinek <jakub@redhat.com>
Wed, 17 Nov 2021 13:18:42 +0000 (14:18 +0100)
commit077425c890927eefacb765ab5236060de9859e82
treee4f7fb7e038006bb0f3d1c4ffa957f1994103c3d
parentc39cb6bf835ca12e590eaa6f90222e51be207c50
lim: Reset flow sensitive info even for pointers [PR103192]

Since 2014 is lim clearing SSA_NAME_RANGE_INFO for integral SSA_NAMEs
if moving them from conditional contexts inside of a loop into unconditional
before the loop, but as the miscompilation of gimplify.c shows, we need to
treat pointers the same, even for them we need to reset whether the pointer
can/can't be null or the recorded pointer alignment.

This fixes
-FAIL: libgomp.c/../libgomp.c-c++-common/target-in-reduction-2.c (internal compiler error)
-FAIL: libgomp.c/../libgomp.c-c++-common/target-in-reduction-2.c (test for excess errors)
-UNRESOLVED: libgomp.c/../libgomp.c-c++-common/target-in-reduction-2.c compilation failed to produce executable
-FAIL: libgomp.c++/../libgomp.c-c++-common/target-in-reduction-2.c (internal compiler error)
-FAIL: libgomp.c++/../libgomp.c-c++-common/target-in-reduction-2.c (test for excess errors)
-UNRESOLVED: libgomp.c++/../libgomp.c-c++-common/target-in-reduction-2.c compilation failed to produce executable
-FAIL: libgomp.c++/target-in-reduction-2.C (internal compiler error)
-FAIL: libgomp.c++/target-in-reduction-2.C (test for excess errors)
-UNRESOLVED: libgomp.c++/target-in-reduction-2.C compilation failed to produce executable
on both x86_64 and i686.

2021-11-17  Jakub Jelinek  <jakub@redhat.com>

PR tree-optimization/103192
* tree-ssa-loop-im.c (move_computations_worker): Use
reset_flow_sensitive_info instead of manually clearing
SSA_NAME_RANGE_INFO and do it for all SSA_NAMEs, not just ones
with integral types.
gcc/tree-ssa-loop-im.c