https://bugs.llvm.org/show_bug.cgi?id=51209
Bug ID: 51209
Summary: [RISCV] Improve gorc2 detection
Product: libraries
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: RISC-V
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
As encountered on D77804, the gorc2 matching (and the gorc2, gorc2 -> gorc2
combines) are incredibly brittle.
llvm/test/CodeGen/RISCV/rv32zbp.ll
llvm/test/CodeGen/RISCV/rv64zbp.ll
The gorc2, gorc2 -> gorc2 tests that D77804 breaks aren't likely to occur as
InstCombine will already optimize the IR in a similar manner, preventing the
match.
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