[clang] [clang] Fix -fclang-abi-compat for clang 20 (PR #144109)
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Fri Jun 13 09:16:20 PDT 2025
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-clang
@llvm/pr-subscribers-backend-x86
Author: Mariya Podchishchaeva (Fznamznon)
<details>
<summary>Changes</summary>
The value was known already, but it was parsed as latest which is incorrect because we are already doing clang 21.
---
Full diff: https://github.com/llvm/llvm-project/pull/144109.diff
2 Files Affected:
- (modified) clang/lib/Frontend/CompilerInvocation.cpp (+2)
- (modified) clang/test/CodeGen/X86/avx-cxx-record.cpp (+2)
``````````diff
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 2c02719121c73..9c0890713dc06 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -4475,6 +4475,8 @@ bool CompilerInvocation::ParseLangArgs(LangOptions &Opts, ArgList &Args,
Opts.setClangABICompat(LangOptions::ClangABI::Ver18);
else if (Major <= 19)
Opts.setClangABICompat(LangOptions::ClangABI::Ver19);
+ else if (Major <= 20)
+ Opts.setClangABICompat(LangOptions::ClangABI::Ver20);
} else if (Ver != "latest") {
Diags.Report(diag::err_drv_invalid_value)
<< A->getAsString(Args) << A->getValue();
diff --git a/clang/test/CodeGen/X86/avx-cxx-record.cpp b/clang/test/CodeGen/X86/avx-cxx-record.cpp
index bcd9c361fda90..6ce6815a521a1 100644
--- a/clang/test/CodeGen/X86/avx-cxx-record.cpp
+++ b/clang/test/CodeGen/X86/avx-cxx-record.cpp
@@ -1,4 +1,5 @@
// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-llvm -O2 -target-cpu x86-64-v3 -o - | FileCheck %s
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-llvm -O2 -target-cpu x86-64-v3 -fclang-abi-compat=20 -o - | FileCheck --check-prefix CLANG-20 %s
using UInt64x2 = unsigned long long __attribute__((__vector_size__(16), may_alias));
@@ -11,6 +12,7 @@ struct XMM2 : XMM1<0>, XMM1<1> {
};
// CHECK: define{{.*}} @_Z3foov({{.*}} [[ARG:%.*]]){{.*}}
+// CLANG-20: define{{.*}} <4 x double> @_Z3foov()
// CHECK: entry:
// CHECK-NEXT: store {{.*}}, ptr [[ARG]]{{.*}}
// CHECK-NEXT: [[TMP1:%.*]] = getelementptr {{.*}}, ptr [[ARG]]{{.*}}
``````````
</details>
https://github.com/llvm/llvm-project/pull/144109
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