This fixes unintended clobbering of SSA_NAME_DEF_STMT of the
cloned/inlined from SSA name during IPA parameter manipulation
of call stmt LHSs. gimple_call_set_lhs adjusts SSA_NAME_DEF_STMT
of the lhs to the stmt being modified but when
ipa_param_body_adjustments::modify_call_stmt is called the
cloning/inlining process has not yet remapped the stmts operands
to the copy variants but they are still original.
Bootstrapped on x86_64-unknown-linux-gnu, testing in progress.
OK for trunk and branch?
Thanks,
Richard.
2021-05-11 Richard Biener <rguent...@suse.de>
PR ipa/100513
* ipa-param-manipulation.c
(ipa_param_body_adjustments::modify_call_stmt): Avoid
altering SSA_NAME_DEF_STMT by adjusting the calls LHS
via gimple_call_lhs_ptr.
---
gcc/ipa-param-manipulation.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/gcc/ipa-param-manipulation.c b/gcc/ipa-param-manipulation.c
index 1d1e64f546a..f2d91476655 100644
--- a/gcc/ipa-param-manipulation.c
+++ b/gcc/ipa-param-manipulation.c
@@ -1692,7 +1692,9 @@ ipa_param_body_adjustments::modify_call_stmt (gcall
**stmt_p)
if (tree lhs = gimple_call_lhs (stmt))
{
modify_expression (&lhs, false);
- gimple_call_set_lhs (new_stmt, lhs);
+ /* Avoid adjusting SSA_NAME_DEF_STMT of a SSA lhs, SSA names
+ have not yet been remapped. */
+ *gimple_call_lhs_ptr (new_stmt) = lhs;
}
*stmt_p = new_stmt;
return true;
--
2.26.2
