| Commit message (Collapse) | Author | Age | Files | Lines | |
|---|---|---|---|---|---|
| * | [DAGCombine][X86][Thumb2/LowOverheadLoops] `A - (A & C)` -> `A & (~C)` fold ↵ | Roman Lebedev | 2020-01-03 | 1 | -27/+10 |
| | | | | | | | | | | | | | | | | | | | | | | (PR44448) While we do manage to fold integer-typed IR in middle-end, we can't do that for the main motivational case of pointers. There is @llvm.ptrmask() intrinsic which may or may not be helpful, but i'm not sure it is fully considered canonical yet, not everything is fully aware of it likely. Name: PR44448 ptr - (ptr & C) -> ptr & (~C) %bias = and i32 %ptr, C %r = sub i32 %ptr, %bias => %r = and i32 %ptr, ~C See https://bugs.llvm.org/show_bug.cgi?id=44448 https://reviews.llvm.org/D71499 | ||||
| * | [NFC][DAGCombine][X86] Tests for 'A - (A & C)' pattern (PR44448) | Roman Lebedev | 2020-01-03 | 1 | -0/+169 |
| Name: PR44448 ptr - (ptr & C) -> ptr & (~C) %bias = and i32 %ptr, C %r = sub i32 %ptr, %bias => %r = and i32 %ptr, ~C The main motivational pattern involes pointer-typed values, so this transform can't really be done in middle-end. See https://bugs.llvm.org/show_bug.cgi?id=44448 https://reviews.llvm.org/D71499 | |||||
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index : bcm5719-llvm | |
| Project Ortega BCM5719 LLVM | Raptor Computing Systems |
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