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Revision tags: llvmorg-21-init, llvmorg-19.1.7, llvmorg-19.1.6, llvmorg-19.1.5, llvmorg-19.1.4, llvmorg-19.1.3, llvmorg-19.1.2 |
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14c4f28e |
| 01-Oct-2024 |
Alex Bradbury <asb@igalia.com> |
[RISCV] Enable load clustering by default (#73789)
We believe this is neutral or slightly better in the majority of cases.
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Revision tags: llvmorg-19.1.1, llvmorg-19.1.0, llvmorg-19.1.0-rc4, llvmorg-19.1.0-rc3, llvmorg-19.1.0-rc2 |
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307d1249 |
| 01-Aug-2024 |
Craig Topper <craig.topper@sifive.com> |
[LegalizeTypes][RISCV][LoongArch] Optimize promotion of ucmp. (#101366)
ucmp can be promoted with either sext or zext. RISC-V and LoongArch
prefer sext for promoting i32 to i64 unless the inputs ar
[LegalizeTypes][RISCV][LoongArch] Optimize promotion of ucmp. (#101366)
ucmp can be promoted with either sext or zext. RISC-V and LoongArch
prefer sext for promoting i32 to i64 unless the inputs are known to be
zero extended already.
This patch uses the existing SExtOrZExtPromotedOperands function that is
used by SETCC promotion to intelligently handle this.
show more ...
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Revision tags: llvmorg-19.1.0-rc1, llvmorg-20-init |
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e094abde |
| 16-Jul-2024 |
Volodymyr Vasylkun <vvmposeydon@gmail.com> |
[SelectionDAG] Expand [US]CMP using arithmetic on boolean values instead of selects (#98774)
The previous expansion of [US]CMP was done using two selects and two
compares. It produced decent code,
[SelectionDAG] Expand [US]CMP using arithmetic on boolean values instead of selects (#98774)
The previous expansion of [US]CMP was done using two selects and two
compares. It produced decent code, but on many platforms it is better to
implement [US]CMP nodes by performing the following operation:
```
[us]cmp(x, y) = (x [us]> y) - (x [us]< y)
```
This patch adds this new expansion, as well as a hook in TargetLowering to allow some targets to still use the select-based approach. AArch64 and SystemZ are currently the only targets to prefer the former approach, but other targets may also start to use it if it provides for better codegen.
show more ...
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