[all-commits] [llvm/llvm-project] 6df97a: [CIR] Record -ffp-contract=fast as a per-op contra...

[David Rivera via All-commits]

  Branch: refs/heads/users/riverdave/ffastmath-flags
  Home:   https://github.com/llvm/llvm-project
  Commit: 6df97aa3ec547f4b27c4d471597b24c6f953bf99
      https://github.com/llvm/llvm-project/commit/6df97aa3ec547f4b27c4d471597b24c6f953bf99
  Author: David Rivera <davidriverg at gmail.com>
  Date:   2026-09-24 (Thu, 24 Sep 2026)

  Changed paths:
    M clang/include/clang/CIR/Dialect/Builder/CIRBaseBuilder.h
    M clang/include/clang/CIR/Dialect/IR/CIREnumAttr.td
    M clang/include/clang/CIR/Dialect/IR/CIROps.td
    M clang/lib/CIR/CodeGen/CIRGenBuiltin.cpp
    M clang/lib/CIR/CodeGen/CIRGenExprScalar.cpp
    M clang/lib/CIR/CodeGen/CIRGenFunction.cpp
    M clang/lib/CIR/CodeGen/CIRGenFunction.h
    M clang/lib/CIR/Dialect/IR/CIRDialect.cpp
    M clang/lib/CIR/Lowering/DirectToLLVM/LowerToLLVM.cpp
    M clang/lib/CIR/Lowering/DirectToLLVM/LowerToLLVM.h
    A clang/test/CIR/CodeGen/fp-contract-fast.c
    M clang/test/CIR/CodeGen/fp-math-precision-opts.c
    A clang/test/CIR/CodeGenCUDA/fp-contract.cu
    A clang/test/CIR/Lowering/fastmath-contract.cir
    M clang/utils/TableGen/CIRLoweringEmitter.cpp

  Log Message:
  -----------
  [CIR] Record -ffp-contract=fast as a per-op contract flag

Classic CodeGen stamps contract on floating-point instructions so a later
Standard-fusion backend can still form an FMA. CIR only fused within a
statement via cir.fmuladd, which dropped FFMA on the CUDA device default.

Co-authored-by: Cursor <cursoragent at cursor.com>



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