87afc7b81c
For ASHIFT + ZERO_EXTEND pattern, combine pass failed to match it to lea since it will generate non-canonical zero-extend. Adjust predicate and cost_model to allow combine for lea. gcc/ChangeLog: PR target/101716 * config/i386/i386.c (ix86_live_on_entry): Adjust comment. (ix86_decompose_address): Remove retval check for ASHIFT, allow non-canonical zero extend if AND mask covers ASHIFT count. (ix86_legitimate_address_p): Adjust condition for decompose. (ix86_rtx_costs): Adjust cost for lea with non-canonical zero-extend. Co-Authored by: Uros Bizjak <ubizjak@gmail.com> gcc/testsuite/ChangeLog: PR target/101716 * gcc.target/i386/pr101716.c: New test. |
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| c++tools | ||
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