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| author | Richard Biener <rguenther@suse.de> | 2022-02-17 14:40:16 +0100 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2022-02-18 07:58:54 +0100 |
| commit | fe79d652c96b53384ddfa43e312cb0010251391b (patch) | |
| tree | 811ee2a1099174431b334430a16a0cb46ccd7953 /libgo/go/regexp/exec2_test.go | |
| parent | 422d1d378e52418d821781ad756cf3eafc3fa9a2 (diff) | |
| download | gcc-fe79d652c96b53384ddfa43e312cb0010251391b.zip gcc-fe79d652c96b53384ddfa43e312cb0010251391b.tar.gz gcc-fe79d652c96b53384ddfa43e312cb0010251391b.tar.bz2 | |
target/104581 - compile-time regression in mode-switching
The x86 backend piggy-backs on mode-switching for insertion of
vzeroupper. A recent improvement there was implemented in a way
to walk possibly the whole basic-block for all DF reg def definitions
in its mode_needed hook which is called for each instruction in
a basic-block during mode-switching local analysis.
The following mostly reverts this improvement. It needs to be
re-done in a way more consistent with a local dataflow which
probably means making targets aware of the state of the local
dataflow analysis.
2022-02-17 Richard Biener <rguenther@suse.de>
PR target/104581
* config/i386/i386.cc (ix86_avx_u128_mode_source): Remove.
(ix86_avx_u128_mode_needed): Return AVX_U128_DIRTY instead
of calling ix86_avx_u128_mode_source which would eventually
have returned AVX_U128_ANY in some very special case.
* gcc.target/i386/pr101456-1.c: XFAIL.
Diffstat (limited to 'libgo/go/regexp/exec2_test.go')
0 files changed, 0 insertions, 0 deletions