[clang] 0a1e349 - [WebAssembly] Setting export_name implies llvm.used
Sam Clegg via cfe-commits
cfe-commits at lists.llvm.org
Mon Dec 16 14:48:52 PST 2019
Author: Sam Clegg
Date: 2019-12-16T14:48:38-08:00
New Revision: 0a1e349a7933f7880971533175e11b4bfd22bd53
URL: https://github.com/llvm/llvm-project/commit/0a1e349a7933f7880971533175e11b4bfd22bd53
DIFF: https://github.com/llvm/llvm-project/commit/0a1e349a7933f7880971533175e11b4bfd22bd53.diff
LOG: [WebAssembly] Setting export_name implies llvm.used
This change updates the clang front end to add symbols to llvm.used
when they have explicit export_name attribute.
Differential Revision: https://reviews.llvm.org/D71493
Added:
Modified:
clang/lib/Sema/SemaDeclAttr.cpp
clang/test/CodeGen/wasm-export-name.c
Removed:
################################################################################
diff --git a/clang/lib/Sema/SemaDeclAttr.cpp b/clang/lib/Sema/SemaDeclAttr.cpp
index e83688c46be1..678320487453 100644
--- a/clang/lib/Sema/SemaDeclAttr.cpp
+++ b/clang/lib/Sema/SemaDeclAttr.cpp
@@ -5772,8 +5772,8 @@ static void handleWebAssemblyExportNameAttr(Sema &S, Decl *D, const ParsedAttr &
if (!S.checkStringLiteralArgumentAttr(AL, 0, Str, &ArgLoc))
return;
- FD->addAttr(::new (S.Context)
- WebAssemblyExportNameAttr(S.Context, AL, Str));
+ D->addAttr(::new (S.Context) WebAssemblyExportNameAttr(S.Context, AL, Str));
+ D->addAttr(UsedAttr::CreateImplicit(S.Context));
}
static void handleWebAssemblyImportModuleAttr(Sema &S, Decl *D, const ParsedAttr &AL) {
diff --git a/clang/test/CodeGen/wasm-export-name.c b/clang/test/CodeGen/wasm-export-name.c
index b662a272cbac..f2556155dd4c 100644
--- a/clang/test/CodeGen/wasm-export-name.c
+++ b/clang/test/CodeGen/wasm-export-name.c
@@ -6,6 +6,8 @@ int foo(void) {
return 43;
}
+// CHECK: @llvm.used = appending global [1 x i8*] [i8* bitcast (i32 ()* @foo to i8*)]
+
// CHECK: define i32 @foo() [[A:#[0-9]+]]
// CHECK: attributes [[A]] = {{{.*}} "wasm-export-name"="bar" {{.*}}}
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