[WebAssembly] Ensure BasicSymbolRef.getRawDataRefImpl().p is non-null

Store a non-zero value to ref.d.a and use ref.d.b to store the symbol
index.  This means that ref.p is never null, which was confusing
llvm-nm.

Fixes PR40497

Differential Revision: https://reviews.llvm.org/D57373

llvm-svn: 352551

2 files changed, 24 insertions, 1 deletions

diff --git a/llvm/test/tools/llvm-nm/lit.local.cfg b/llvm/test/tools/llvm-nm/lit.local.cfg
index 447a7375519..1fc0bea084c 100644
--- a/llvm/test/tools/llvm-nm/lit.local.cfg
+++ b/llvm/test/tools/llvm-nm/lit.local.cfg
@@ -1,4 +1,4 @@
 if not 'X86' in config.root.targets:
     config.unsupported = True
 
-config.suffixes = ['.s', '.test', '.yaml']
+config.suffixes = ['.ll', '.s', '.test', '.yaml']
diff --git a/llvm/test/tools/llvm-nm/wasm/extern-only.ll b/llvm/test/tools/llvm-nm/wasm/extern-only.ll
new file mode 100644
index 00000000000..46fecba0473
--- /dev/null
+++ b/llvm/test/tools/llvm-nm/wasm/extern-only.ll
@@ -0,0 +1,23 @@
+; RUN: llc -filetype=obj -mtriple=wasm32-unknown-unknown -o %t.o %s
+; RUN: llvm-nm --extern-only %t.o | FileCheck %s
+
+; Verity that hidden symbols are listed even when --extern-only is passed
+
+define hidden i32 @foo() {
+entry:
+  ret i32 42
+}
+
+define i32 @bar() {
+entry:
+  ret i32 43
+}
+
+define internal i32 @baz() {
+entry:
+  ret i32 44
+}
+
+; CHECK: 00000006 T bar
+; CHECK-NOT: baz
+; CHECK: 00000001 T foo