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In the recent get_narrower change, I wanted it to be efficient and avoid recursion if there are many nested COMPOUND_EXPRs. That builds the COMPOUND_EXPR nest with the right arguments, but as build2_loc computes some flags like TREE_SIDE_EFFECTS, TREE_CONSTANT and TREE_READONLY, when it is called with something that will not be the argument in the end, those flags are computed incorrectly. So, this patch instead uses an auto_vec and builds them in the reverse order so when they are built, they are built with the correct operands. 2020-04-23 Jakub Jelinek <jakub@redhat.com> PR middle-end/94724 * tree.c (get_narrower): Instead of creating COMPOUND_EXPRs temporarily with non-final second operand and updating it later, push COMPOUND_EXPRs into a vector and process it in reverse, creating COMPOUND_EXPRs with the final operands. * gcc.c-torture/execute/pr94724.c: New test.
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