serge-sans-paille updated this revision to Diff 238614. serge-sans-paille added a comment.
Add test case Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D72869/new/ https://reviews.llvm.org/D72869 Files: clang/include/clang/Basic/Builtins.def clang/lib/CodeGen/CGBuiltin.cpp clang/test/CodeGen/builtins.c Index: clang/test/CodeGen/builtins.c =================================================================== --- clang/test/CodeGen/builtins.c +++ clang/test/CodeGen/builtins.c @@ -453,6 +453,13 @@ int *d = __builtin_launder(p); } +// __warn_memset_zero_len should be NOP, see https://sourceware.org/bugzilla/show_bug.cgi?id=25399 +// CHECK-LABEL: define void @test___warn_memset_zero_len +void test___warn_memset_zero_len() { + // CHECK-NOT: @__warn_memset_zero_len + __warn_memset_zero_len(); +} + // Behavior of __builtin_os_log differs between platforms, so only test on X86 #ifdef __x86_64__ Index: clang/lib/CodeGen/CGBuiltin.cpp =================================================================== --- clang/lib/CodeGen/CGBuiltin.cpp +++ clang/lib/CodeGen/CGBuiltin.cpp @@ -3222,6 +3222,8 @@ Builder.CreateZExt(EmitSignBit(*this, EmitScalarExpr(E->getArg(0))), ConvertType(E->getType()))); } + case Builtin::BI__warn_memset_zero_len: + return RValue::getIgnored(); case Builtin::BI__annotation: { // Re-encode each wide string to UTF8 and make an MDString. SmallVector<Metadata *, 1> Strings; Index: clang/include/clang/Basic/Builtins.def =================================================================== --- clang/include/clang/Basic/Builtins.def +++ clang/include/clang/Basic/Builtins.def @@ -788,6 +788,9 @@ BUILTIN(__builtin_index, "c*cC*i", "Fn") BUILTIN(__builtin_rindex, "c*cC*i", "Fn") +// ignored glibc builtin, see https://sourceware.org/bugzilla/show_bug.cgi?id=25399 +BUILTIN(__warn_memset_zero_len, "v", "nU") + // Microsoft builtins. These are only active with -fms-extensions. LANGBUILTIN(_alloca, "v*z", "n", ALL_MS_LANGUAGES) LANGBUILTIN(__annotation, "wC*.","n", ALL_MS_LANGUAGES)
Index: clang/test/CodeGen/builtins.c =================================================================== --- clang/test/CodeGen/builtins.c +++ clang/test/CodeGen/builtins.c @@ -453,6 +453,13 @@ int *d = __builtin_launder(p); } +// __warn_memset_zero_len should be NOP, see https://sourceware.org/bugzilla/show_bug.cgi?id=25399 +// CHECK-LABEL: define void @test___warn_memset_zero_len +void test___warn_memset_zero_len() { + // CHECK-NOT: @__warn_memset_zero_len + __warn_memset_zero_len(); +} + // Behavior of __builtin_os_log differs between platforms, so only test on X86 #ifdef __x86_64__ Index: clang/lib/CodeGen/CGBuiltin.cpp =================================================================== --- clang/lib/CodeGen/CGBuiltin.cpp +++ clang/lib/CodeGen/CGBuiltin.cpp @@ -3222,6 +3222,8 @@ Builder.CreateZExt(EmitSignBit(*this, EmitScalarExpr(E->getArg(0))), ConvertType(E->getType()))); } + case Builtin::BI__warn_memset_zero_len: + return RValue::getIgnored(); case Builtin::BI__annotation: { // Re-encode each wide string to UTF8 and make an MDString. SmallVector<Metadata *, 1> Strings; Index: clang/include/clang/Basic/Builtins.def =================================================================== --- clang/include/clang/Basic/Builtins.def +++ clang/include/clang/Basic/Builtins.def @@ -788,6 +788,9 @@ BUILTIN(__builtin_index, "c*cC*i", "Fn") BUILTIN(__builtin_rindex, "c*cC*i", "Fn") +// ignored glibc builtin, see https://sourceware.org/bugzilla/show_bug.cgi?id=25399 +BUILTIN(__warn_memset_zero_len, "v", "nU") + // Microsoft builtins. These are only active with -fms-extensions. LANGBUILTIN(_alloca, "v*z", "n", ALL_MS_LANGUAGES) LANGBUILTIN(__annotation, "wC*.","n", ALL_MS_LANGUAGES)
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