在 2025/7/4 上午9:52, Xi Ruoyao 写道:
In GCC 16 the compiler is smarter and it optimizes away the unneeded
zero-extension during the expand pass. Thus we can no longer match
and_alsl_reversed.
Drop the scan-rtl-dump for and_alsl_reversed and add scan-assembler-not
against bstrpick.d to detect the unneeded zero-extension in case it
regresses in the future.
gcc/testsuite/ChangeLog:
* gcc.target/loongarch/bstrpick_alsl_paired.c
(scan-rtl-dump): Remove.
(scan-assembler-not): Make the test fail if the redundant
zero-extension is found.
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Tested on loongarch64-linux-gnu. Ok for trunk?
LGTM! Thanks!
