[all-commits] [llvm/llvm-project] cd9236: Account for inline assembly instructions in inlini...

[Rahman Lavaee via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: cd9236d78833a3f312d0a38e53e3f12e9926bcf3
      https://github.com/llvm/llvm-project/commit/cd9236d78833a3f312d0a38e53e3f12e9926bcf3
  Author: Rahman Lavaee <rahmanl at google.com>
  Date:   2025-07-09 (Wed, 09 Jul 2025)

  Changed paths:
    M llvm/lib/Analysis/InlineCost.cpp
    A llvm/test/Transforms/Inline/inline-call-with-asm-call.ll

  Log Message:
  -----------
  Account for inline assembly instructions in inlining cost. (#146628)

Inliner currently treats every "call asm" IR instruction as a single
instruction regardless of how many instructions the inline assembly may
contain. This may underestimate the cost of inlining for a callee
containing long inline assembly. Besides, we may need to assign a higher
cost to instructions in inline assembly since they cannot be analyzed
and optimized by the compiler.

This PR introduces a new option `-inline-asm-instr-cost` -- set zero by
default, which can control the cost of inline assembly instructions in
inliner's cost-benefit analysis.



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications