wasm: generate function to get tag name

When we lower the instruction for `@tagName` we generate a new
function if it doesn't exist yet for that decl. This function creates
an if-else chain to determine which value was provided. Each tag
generates a constant that contains its name as the value. For each
tag we generate a case where the pointer of the string is stored in
the result slice. The length of the tagname is comptime-known, therefore
will be stored in the slice directly without having it being part of
the tagname symbol. In the future this can use a jump table instead
of an if-else chain, similar to the `switch` instruction.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/link/Wasm.zig b/src/link/Wasm.zig
index b1fc25bf26..639b7f0776 100644
--- a/src/link/Wasm.zig
+++ b/src/link/Wasm.zig
@@ -577,7 +577,7 @@ pub fn getOrCreateAtomForDecl(wasm: *Wasm, decl_index: Module.Decl.Index) !Atom.
 }
 
 /// Creates a new empty `Atom` and returns its `Atom.Index`
-fn createAtom(wasm: *Wasm) !Atom.Index {
+pub fn createAtom(wasm: *Wasm) !Atom.Index {
     const index = @intCast(Atom.Index, wasm.managed_atoms.items.len);
     const atom = try wasm.managed_atoms.addOne(wasm.base.allocator);
     atom.* = Atom.empty;
@@ -1208,7 +1208,7 @@ fn resolveLazySymbols(wasm: *Wasm) !void {
 
 // Tries to find a global symbol by its name. Returns null when not found,
 /// and its location when it is found.
-fn findGlobalSymbol(wasm: *Wasm, name: []const u8) ?SymbolLoc {
+pub fn findGlobalSymbol(wasm: *Wasm, name: []const u8) ?SymbolLoc {
     const offset = wasm.string_table.getOffset(name) orelse return null;
     return wasm.globals.get(offset);
 }