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| author | Wilco Dijkstra <wilco.dijkstra@arm.com> | 2022-12-12 15:44:03 +0000 |
|---|---|---|
| committer | Wilco Dijkstra <wilco.dijkstra@arm.com> | 2022-12-12 16:31:31 +0000 |
| commit | 2d7c73ee5eae47eee16ddab3df2928ff5a7dd89c (patch) | |
| tree | 5c2bfbe863941262f20c0e80b6c32e997def3d88 /gcc/d | |
| parent | 4d9db4bdd458a4b526f59e4bc5bbd549d3861cea (diff) | |
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AArch64: Enable TARGET_CONST_ANCHOR
Enable TARGET_CONST_ANCHOR to allow complex constants to be created via
immediate add/sub. Use a 24-bit range as that enables a 3 or 4-instruction
immediate to be replaced by 2 add/sub instructions. Fix the costing of
add/sub to support 24-bit and 12-bit shifted immediates.
The generated code for the testcase is now the same or better than LLVM.
It also results in a small codesize reduction on SPEC.
gcc/
* config/aarch64/aarch64.cc (aarch64_rtx_costs): Add correct costs
for 24-bit and 12-bit shifted immediate add/sub.
(TARGET_CONST_ANCHOR): Define.
* config/aarch64/predicates.md (aarch64_pluslong_immediate):
Fix range check.
gcc/testsuite/
* gcc.target/aarch64/movk_3.c: New test.
Diffstat (limited to 'gcc/d')
0 files changed, 0 insertions, 0 deletions