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| author | Luke Quinn <quic_lquinn@quicinc.com> | 2025-01-07 21:53:10 -0500 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2025-01-07 18:53:10 -0800 |
| commit | dde5546b79f784ab71cac325e0a0698c67c4dcde (patch) | |
| tree | 309ff0a1eff51a931d143c139abd91f224c7c349 /clang/lib/CodeGen/BackendUtil.cpp | |
| parent | 4583f6d3443c8dc6605c868724e3743161954210 (diff) | |
| download | llvm-dde5546b79f784ab71cac325e0a0698c67c4dcde.zip llvm-dde5546b79f784ab71cac325e0a0698c67c4dcde.tar.gz llvm-dde5546b79f784ab71cac325e0a0698c67c4dcde.tar.bz2 | |
[RISCV] GISel custom lowering for G_ADD/G_SUB (#121587)
Custom lowering for s32 G_ADD/SUB to help match selection dag better.
Specifically for RV64 a s32 is produced as a add+sext the output this
allows for fewer instructions to sign extend a couple patterns. Allows
for the generation of addiw,subw,negw to reduce required instructions to
load values quicker
Log2_ceil_i32 in rvzbb.ll shows a more obvious improvement case.
Diffstat (limited to 'clang/lib/CodeGen/BackendUtil.cpp')
0 files changed, 0 insertions, 0 deletions