5d057bfeff
In the following testcase we only optimize f2 and f7 to btrl, although we should optimize that way all of the functions. The problem is the type demotion/narrowing (which is performed solely during the generic folding and not later), without it we see the AND performed in SImode and match it as btrl, but with it while the shifts are still performed in SImode, the AND is already done in QImode or HImode low part of the shift. 2021-01-13 Jakub Jelinek <jakub@redhat.com> PR target/96938 * config/i386/i386.md (*btr<mode>_1, *btr<mode>_2): New define_insn_and_split patterns. (splitter after *btr<mode>_2): New splitter. * gcc.target/i386/pr96938.c: New test. |
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