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re PR rtl-optimization/83565 (RTL combine pass yields wrong rotate result)
authorEric Botcazou <ebotcazou@adacore.com>
Fri, 12 Jan 2018 10:18:24 +0000 (10:18 +0000)
committerEric Botcazou <ebotcazou@gcc.gnu.org>
Fri, 12 Jan 2018 10:18:24 +0000 (10:18 +0000)
commit371ae937660d0a6e5c1ce680c775d37d7ff13ba9
tree41fac78fb9fc33bf7665d785001199058967572ctree
parentc574147e6298bf5e623c1c10c0deddde8cec507bcommit | diff
re PR rtl-optimization/83565 (RTL combine pass yields wrong rotate result)

PR rtl-optimization/83565
* rtlanal.c (nonzero_bits1): On WORD_REGISTER_OPERATIONS machines, do
not extend the result to a larger mode for rotate operations.
(num_sign_bit_copies1): Likewise.

From-SVN: r256572
gcc/ChangeLog diff | blob | history
gcc/rtlanal.c diff | blob | history
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gcc/testsuite/gcc.c-torture/execute/20180112-1.c [new file with mode: 0644] blob