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The patch caused regressions in gcc.target/sh/pr64345-1.c on sh3-linux-gnu and gcc.target/m68k/pr39726.c on m68k-linux-gnu. It didn't look like they would be fixable in an acceptably non-invasive and unhacky way, so punting till future releases. 2020-01-29 Richard Sandiford <richard.sandiford@arm.com> gcc/ Revert: 2020-01-28 Richard Sandiford <richard.sandiford@arm.com> PR rtl-optimization/87763 * simplify-rtx.c (simplify_truncation): Extend sign/zero_extract simplification to handle subregs as well as bare regs. * config/i386/i386.md (*testqi_ext_3): Match QI extracts too.
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