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| author | Mingming Liu <mingmingl@google.com> | 2022-10-15 11:50:56 -0700 |
|---|---|---|
| committer | Mingming Liu <mingmingl@google.com> | 2022-10-18 09:07:14 -0700 |
| commit | 34d18fd241abafdf0436cbceebdeff2ecf685ae2 (patch) | |
| tree | 4bf9c7b76ecd170a3cd31634399aa578775933c4 /lldb/source/Plugins/ScriptInterpreter/Python | |
| parent | 615af94dc20cb71d537858d30cf53549a6f063fc (diff) | |
[AArch64] Enhance bit-field-positioning op matcher to see through 'any_extend' for pattern 'and(any_extend(shl(val, N)), shifted-mask)'
Before this patch (and refactor patch D135843), isBitfieldPositioningOp won't handle "and(any_extend(shl(val, N), shifted-mask)" (bail out if AND op is not SHL)
After this patch, isBitfieldPositioningOp will see through "any_extend" to find "shl" to find possible bit-field-positioning nodes.
https://gcc.godbolt.org/z/3ncGKbGW6 is a four-liner LLVM IR that could be optimized to UBFIZ (see added test case test_and_extended_shift_with_imm in llvm/test/CodeGen/AArch64/bitfield-insert.ll). One existing test case also improves.
Differential Revision: https://reviews.llvm.org/D135852
Diffstat (limited to 'lldb/source/Plugins/ScriptInterpreter/Python')
0 files changed, 0 insertions, 0 deletions