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| author | Wilco Dijkstra <wdijkstr@arm.com> | 2019-08-22 14:52:24 +0000 |
|---|---|---|
| committer | Wilco Dijkstra <wilco@gcc.gnu.org> | 2019-08-22 14:52:24 +0000 |
| commit | cdfc0e863a03698a80c74896cbdc9f5c8c652e64 (patch) | |
| tree | cbf2419858e944cc5860cf9a96861ea3cf17be22 /gcc/expr.c | |
| parent | 203ef022c6a0477c33a8cf4a65890e33d0912cf0 (diff) | |
| download | gcc-cdfc0e863a03698a80c74896cbdc9f5c8c652e64.zip gcc-cdfc0e863a03698a80c74896cbdc9f5c8c652e64.tar.gz gcc-cdfc0e863a03698a80c74896cbdc9f5c8c652e64.tar.bz2 | |
[ARM] Cleanup logical DImode operations
Cleanup the logical DImode operations since the current implementation is way
too complicated. Thumb-1, Thumb-2, VFP/Neon and iwMMXt all work differently,
resulting in a bewildering number of expansions, patterns and splits across
several md files. All this complexity is counterproductive and results in
inefficient code.
A much simpler approach is to split these operations early in the expander
so that optimizations and register allocation are applied on the 32-bit halves.
Codegeneration is unchanged on Thumb-1 and Arm/Thumb-2 without Neon or iwMMXt
(which already expand these instructions early). With Neon these changes save
~1000 instructions from the PR77308 testcase, mostly by significantly reducing
register pressure and spilling.
Bootstrap OK on arm-none-linux-gnueabihf --with-cpu=cortex-a57
gcc/
* config/arm/arm.md (split and/eor/ior): Remove Neon check.
(split not): Add DImode not splitter.
(anddi3): Remove pattern.
(anddi3_insn): Likewise.
(anddi_zesidi_di): Likewise.
(anddi_sesdi_di): Likewise.
(anddi_notdi_di): Likewise.
(anddi_notzesidi_di): Likewise.
(anddi_notsesidi_di): Likewise.
(iordi3): Likewise.
(iordi3_insn): Likewise.
(iordi_zesidi_di): Likewise.
(iordi_sesidi_di): Likewise.
(xordi3): Likewise.
(xordi3_insn): Likewise.
(xordi_sesidi_di): Likewise.
(xordi_zesidi_di): Likewise.
(one_cmpldi2): Likewise.
(one_cmpldi2_insn): Likewise.
* config/arm/constraints.md: Remove De, Df, Dg constraints.
* config/arm/iwmmxt.md (iwmmxt_iordi3): Remove general register
alternative.
(iwmmxt_xordi3): Likewise.
(iwmmxt_anddi3): Likewise.
* config/arm/neon.md (orndi3_neon): Remove pattern.
(anddi_notdi_di): Likewise.
* config/arm/predicates.md (arm_anddi_operand_neon): Remove.
(arm_iordi_operand_neon): Likewise.
(arm_xordi_operand_neon): Likewise.
* config/arm/thumb2.md(iordi_notdi_di): Remove pattern.
(iordi_notzesidi_di): Likewise.
(iordi_notdi_zesidi): Likewise.
(iordi_notsesidi_di): Likewise.
From-SVN: r274823
Diffstat (limited to 'gcc/expr.c')
0 files changed, 0 insertions, 0 deletions