ipa: Fix segfault when remapping debug_binds with expressions (PR 103132)

My initial implementation of the method
ipa_param_body_adjustments::remap_with_debug_expressions was based on
the assumption that if it was asked to remap an expression (as opposed
to a simple SSA_NAME), the expression would not contain an SSA_NAME
operand which is to be debug-reset.  While that is true for when
called from ipa_param_body_adjustments::prepare_debug_expressions, it
turns out it is not true when invoked from remap_gimple_stmt in
tree-inline.c.  This patch adds a simple logic to handle such cases
and simply map the entire value to NULL_TREE in those cases.

gcc/ChangeLog:

2021-11-08  Martin Jambor  <mjambor@suse.cz>

	PR ipa/103132
	* ipa-param-manipulation.c (replace_with_mapped_expr): Early
	return with error_mark_mode when part of expression is mapped to
	NULL.
	(ipa_param_body_adjustments::remap_with_debug_expressions): Set
	mapped value to NULL if walk_tree returns error_mark_mode.

gcc/testsuite/ChangeLog:

2021-11-08  Martin Jambor  <mjambor@suse.cz>

	PR ipa/103132
	* gcc.dg/ipa/pr103132.c: New test.

0 files changed, 0 insertions, 0 deletions