[clang] [Clang][CodeGen] Automatically resolve MSVC _hypotf and dllimport for… (PR #207135)
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Thu Jul 2 00:47:50 PDT 2026
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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->
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You can test this locally with the following command:
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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,c -- clang/test/CodeGen/msvc-builtin-hypotf.c clang/lib/CodeGen/CGBuiltin.cpp --diff_from_common_commit
``````````
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index ebe9f7049..2877294d6 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -251,17 +251,18 @@ llvm::Constant *CodeGenModule::getBuiltinLibFunction(const FunctionDecl *FD,
// code calling builtins directly without headers), perform automatic
// resolution of MSVC CRT symbol names and DLL import attributes.
bool IsNoHeader = (D == GlobalDecl(FD));
- if (IsNoHeader && getTriple().isWindowsMSVCEnvironment() && Name == "hypotf") {
+ if (IsNoHeader && getTriple().isWindowsMSVCEnvironment() &&
+ Name == "hypotf") {
// Map C99 float math functions to their MSVC CRT prefixed names on Windows.
- // (Only hypotf needs mapping as it is not exported without prefix in UCRT on both x86 and x64).
+ // (Only hypotf needs mapping as it is not exported without prefix in UCRT
+ // on both x86 and x64).
Name = "_hypotf";
}
llvm::FunctionType *Ty =
cast<llvm::FunctionType>(getTypes().ConvertType(FD->getType()));
- llvm::Constant *C =
- GetOrCreateLLVMFunction(Name, Ty, D, /*ForVTable=*/false);
+ llvm::Constant *C = GetOrCreateLLVMFunction(Name, Ty, D, /*ForVTable=*/false);
// When compiling under dynamic CRT (/MD or -D_DLL), standard CRT library
// functions reside in dynamic runtime DLLs. Automatically attach dllimport
``````````
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https://github.com/llvm/llvm-project/pull/207135
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