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The following patch fixes ICE on the testcase in similar way to how other folded builtins are handled in ix86_gimple_fold_builtin when they don't have a lhs; these builtins are const or pure, so normally DCE would remove them later, but with -O0 that isn't guaranteed to happen, and during expansion if they are marked TREE_SIDE_EFFECTS it might still be attempted to be expanded. This removes them right away during the folding. Initially I wanted to also change all gsi_replace last args in that function to true, but Andrew pointed to PR107209, so I've kept them as is. 2023-12-13 Jakub Jelinek <jakub@redhat.com> PR target/112962 * config/i386/i386.cc (ix86_gimple_fold_builtin): For shifts and abs without lhs replace with nop. * gcc.target/i386/pr112962.c: New test.
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