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PR rtl-optimization 61494: Preserve x-0.0 with HONOR_SNANS.
authorRoger Sayle <roger@nextmovesoftware.com>
Mon, 3 Aug 2020 12:15:58 +0000 (13:15 +0100)
committerRoger Sayle <roger@nextmovesoftware.com>
Mon, 3 Aug 2020 12:15:58 +0000 (13:15 +0100)
commit919c9d4bd3db7da09061af3b6f2a9193bf7bae45
treeb706d143612fce480a37f2cab09f6c426d9da51ctree
parentef59e1fb372c91c882784392b98c44a8550ff455commit | diff
PR rtl-optimization 61494: Preserve x-0.0 with HONOR_SNANS.

The following patch avoids simplifying x-0.0 to x when -fsignaling-nans
is specified, which resolves PR rtl-optimization 61494.  Indeed, running
the test program attached to that PR now reports no failures.

2020-08-02  Roger Sayle  <roger@nextmovesoftware.com>

gcc/ChangeLog
PR rtl-optimization/61494
* simplify-rtx.c (simplify_binary_operation_1) [MINUS]: Don't
simplify x - 0.0 with -fsignaling-nans.
gcc/simplify-rtx.c diff | blob | history