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| author | Richard Henderson <richard.henderson@linaro.org> | 2025-08-07 04:51:02 +0000 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2025-08-11 23:25:09 +0000 |
| commit | 976bad6ea48346b0dc31e68b035daa9569724fb5 (patch) | |
| tree | 3cfacda7a3037faa099693e63431be73d2276077 /gcc/rust/rust-attribs.cc | |
| parent | 5a2d86939c735ca2e9aba68c534bffe763a8f7a6 (diff) | |
| download | gcc-976bad6ea48346b0dc31e68b035daa9569724fb5.zip gcc-976bad6ea48346b0dc31e68b035daa9569724fb5.tar.gz gcc-976bad6ea48346b0dc31e68b035daa9569724fb5.tar.bz2 | |
aarch64: Remove cc clobber from *aarch64_tbz<LTGE><ALLI>1
There is a conflict between aarch64_tbzltdi1 and aarch64_cbltdi
with respect to pnum_clobbers, resulting in a recog failure:
0xa1fffe fancy_abort(char const*, int, char const*)
../../gcc/diagnostics/context.cc:1640
0x81340e patch_jump_insn
../../gcc/cfgrtl.cc:1303
0xc0eafe redirect_branch_edge
../../gcc/cfgrtl.cc:1330
0xc0f372 cfg_layout_redirect_edge_and_branch
../../gcc/cfgrtl.cc:4736
0xbfb6b9 redirect_edge_and_branch(edge_def*, basic_block_def*)
../../gcc/cfghooks.cc:391
0x1fa9310 try_forward_edges
../../gcc/cfgcleanup.cc:561
0x1fa9310 try_optimize_cfg
../../gcc/cfgcleanup.cc:2931
0x1fa9310 cleanup_cfg(int)
../../gcc/cfgcleanup.cc:3143
0x1fe11e8 rest_of_handle_cse
../../gcc/cse.cc:7591
0x1fe11e8 execute
../../gcc/cse.cc:7622
The simplest solution is to remove the clobber from aarch64_tbz.
This removes the possibility of expansion via TST+B.cond, which
will merely fall back to TBNZ+B on shorter branches.
gcc:
PR target/121385
* config/aarch64/aarch64.md (*aarch64_tbz<LTGE><ALLI>1): Remove
cc clobber and expansion via TST+Bcond.
gcc/testsuite:
PR target/121385
* gcc.target/aarch64/cmpbr-1.c: New.
Diffstat (limited to 'gcc/rust/rust-attribs.cc')
0 files changed, 0 insertions, 0 deletions