[PATCH] D149977: [RISCV] Implement shouldTransformSignedTruncationCheck.

Craig Topper via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Fri May 5 11:34:59 PDT 2023

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This helps avoid constant materialization for the patterns
InstCombine emits for something like INT_MIN <= X && x <= INT_MAX.

See top of changed test files for more detailed explanation.

I've enabled this for i16 when Zbb is enabled. sext.b did not seem
to be a benefit due to the constants folding into addi/sltiu.

  rG LLVM Github Monorepo



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