[WebAssembly] Don't allow functions to be named more than once
Even though a function can have multiple names in the
linking standards (i.e. due to aliases), there can only
be one name for a given function in the NAME section.
Differential Revision: https://reviews.llvm.org/D41975
llvm-svn: 322383
diff --git a/lld/test/wasm/alias.ll b/lld/test/wasm/alias.ll
new file mode 100644
index 0000000..888bcd2
--- /dev/null
+++ b/lld/test/wasm/alias.ll
@@ -0,0 +1,66 @@
+; RUN: llc -mtriple=wasm32-unknown-unknown-wasm -filetype=obj -o %t.o %s
+; RUN: lld -flavor wasm %t.o -o %t.wasm
+; RUN: obj2yaml %t.wasm | FileCheck %s
+
+@start_alias = alias i32 (), i32 ()* @_start
+
+; Function Attrs: nounwind uwtable
+define i32 @_start() local_unnamed_addr #1 {
+entry:
+ ret i32 0
+}
+
+; CHECK: --- !WASM
+; CHECK-NEXT: FileHeader:
+; CHECK-NEXT: Version: 0x00000001
+; CHECK-NEXT: Sections:
+; CHECK-NEXT: - Type: TYPE
+; CHECK-NEXT: Signatures:
+; CHECK-NEXT: - Index: 0
+; CHECK-NEXT: ReturnType: I32
+; CHECK-NEXT: ParamTypes:
+; CHECK-NEXT: - Type: FUNCTION
+; CHECK-NEXT: FunctionTypes: [ 0 ]
+; CHECK-NEXT: - Type: TABLE
+; CHECK-NEXT: Tables:
+; CHECK-NEXT: - ElemType: ANYFUNC
+; CHECK-NEXT: Limits:
+; CHECK-NEXT: Flags: [ HAS_MAX ]
+; CHECK-NEXT: Initial: 0x00000001
+; CHECK-NEXT: Maximum: 0x00000001
+; CHECK-NEXT: - Type: MEMORY
+; CHECK-NEXT: Memories:
+; CHECK-NEXT: - Initial: 0x00000002
+; CHECK-NEXT: - Type: GLOBAL
+; CHECK-NEXT: Globals:
+; CHECK-NEXT: - Index: 0
+; CHECK-NEXT: Type: I32
+; CHECK-NEXT: Mutable: true
+; CHECK-NEXT: InitExpr:
+; CHECK-NEXT: Opcode: I32_CONST
+; CHECK-NEXT: Value: 66560
+; CHECK-NEXT: - Type: EXPORT
+; CHECK-NEXT: Exports:
+; CHECK-NEXT: - Name: memory
+; CHECK-NEXT: Kind: MEMORY
+; CHECK-NEXT: Index: 0
+; CHECK-NEXT: - Name: _start
+; CHECK-NEXT: Kind: FUNCTION
+; CHECK-NEXT: Index: 0
+; CHECK-NEXT: - Name: start_alias
+; CHECK-NEXT: Kind: FUNCTION
+; CHECK-NEXT: Index: 0
+; CHECK-NEXT: - Type: CODE
+; CHECK-NEXT: Functions:
+; CHECK-NEXT: - Index: 0
+; CHECK-NEXT: Locals:
+; CHECK-NEXT: Body: 41000B
+; CHECK-NEXT: - Type: CUSTOM
+; CHECK-NEXT: Name: linking
+; CHECK-NEXT: DataSize: 0
+; CHECK-NEXT: - Type: CUSTOM
+; CHECK-NEXT: Name: name
+; CHECK-NEXT: FunctionNames:
+; CHECK-NEXT: - Index: 0
+; CHECK-NEXT: Name: start_alias
+; CHECK-NEXT: ...