https://github.com/ojhunt created 
https://github.com/llvm/llvm-project/pull/136515

After landing #116760 we hit build failures due to existing fields storing 
FPEvalMethodKind not being wide enough.

>From 535e11400ea11461fa8e0cc98f9b481b045805c4 Mon Sep 17 00:00:00 2001
From: Oliver Hunt <oli...@apple.com>
Date: Sun, 20 Apr 2025 15:29:39 -0700
Subject: [PATCH] Ensure bit-fields storing FPEvalMethodKind are wide enough to
 do so

---
 clang/include/clang/Basic/FPOptions.def   | 2 +-
 clang/include/clang/Basic/LangOptions.def | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/clang/include/clang/Basic/FPOptions.def 
b/clang/include/clang/Basic/FPOptions.def
index 90428c3c73c8b..85986b4ff0b9c 100644
--- a/clang/include/clang/Basic/FPOptions.def
+++ b/clang/include/clang/Basic/FPOptions.def
@@ -24,7 +24,7 @@ OPTION(NoHonorInfs, bool, 1, NoHonorNaNs)
 OPTION(NoSignedZero, bool, 1, NoHonorInfs)
 OPTION(AllowReciprocal, bool, 1, NoSignedZero)
 OPTION(AllowApproxFunc, bool, 1, AllowReciprocal)
-OPTION(FPEvalMethod, LangOptions::FPEvalMethodKind, 2, AllowApproxFunc)
+OPTION(FPEvalMethod, LangOptions::FPEvalMethodKind, 3, AllowApproxFunc)
 OPTION(Float16ExcessPrecision, LangOptions::ExcessPrecisionKind, 2, 
FPEvalMethod)
 OPTION(BFloat16ExcessPrecision, LangOptions::ExcessPrecisionKind, 2, 
Float16ExcessPrecision)
 OPTION(MathErrno, bool, 1, BFloat16ExcessPrecision)
diff --git a/clang/include/clang/Basic/LangOptions.def 
b/clang/include/clang/Basic/LangOptions.def
index 930c1c06d1a76..85ca523c44157 100644
--- a/clang/include/clang/Basic/LangOptions.def
+++ b/clang/include/clang/Basic/LangOptions.def
@@ -347,7 +347,7 @@ BENIGN_ENUM_LANGOPT(DefaultFPContractMode, FPModeKind, 2, 
FPM_Off, "FP contracti
 COMPATIBLE_LANGOPT(ExpStrictFP, 1, false, "Enable experimental strict floating 
point")
 BENIGN_LANGOPT(RoundingMath, 1, false, "Do not assume default floating-point 
rounding behavior")
 BENIGN_ENUM_LANGOPT(FPExceptionMode, FPExceptionModeKind, 2, FPE_Default, "FP 
Exception Behavior Mode type")
-BENIGN_ENUM_LANGOPT(FPEvalMethod, FPEvalMethodKind, 2, FEM_UnsetOnCommandLine, 
"FP type used for floating point arithmetic")
+BENIGN_ENUM_LANGOPT(FPEvalMethod, FPEvalMethodKind, 3, FEM_UnsetOnCommandLine, 
"FP type used for floating point arithmetic")
 ENUM_LANGOPT(Float16ExcessPrecision, ExcessPrecisionKind, 2, FPP_Standard, 
"Intermediate truncation behavior for Float16 arithmetic")
 ENUM_LANGOPT(BFloat16ExcessPrecision, ExcessPrecisionKind, 2, FPP_Standard, 
"Intermediate truncation behavior for BFloat16 arithmetic")
 LANGOPT(NoBitFieldTypeAlign , 1, 0, "bit-field type alignment")

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