[all-commits] [llvm/llvm-project] 08dd64: [RISC-V] Bad immediate value for Zcmp instructions...

[Nemanja Ivanovic via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 08dd645c15a091a53313e278d8f3c090e7c385d1
      https://github.com/llvm/llvm-project/commit/08dd645c15a091a53313e278d8f3c090e7c385d1
  Author: Nemanja Ivanovic <nemanja.i.ibm at gmail.com>
  Date:   2024-03-12 (Tue, 12 Mar 2024)

  Changed paths:
    A llvm/test/CodeGen/RISCV/zcmp-additional-stack.ll

  Log Message:
  -----------
  [RISC-V] Bad immediate value for Zcmp instructions with E extension (#84925)

When we are using the Zcmp extension together with the E extension in
32-bit mode and we need to spill both callee-saved registers as well as
needing a couple of 32-bit stack slots, we emit a meaningless stack
adjustment with cm.push/cm.popret. Furthermore this leads to the stack
slot for the ra being clobbered so control returns to a random location.

This is just a pre-commit test so that the PR for the fix shows the
difference in code generation.



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