zig

commit 5769ed2d4428305e4478cf4e425f5df2469a7ffd (tree)
parent b4692c9a7808caabdf474c2acc6d6d3754e5e2e4
Author: Andrew Kelley <andrew@ziglang.org>
Date:   Fri, 14 May 2021 23:10:38 -0700

stage2: compile log stores node offset

Previously, compile log stored full SrcLoc info, which included absolute
AST node index. This becomes invalid after an incremental compilation.
To make it survive incremental compilation, store an offset from parent
Decl instead.

Diffstat:
M
src/Compilation.zig
 | 
5
+++--
M
src/Module.zig
 | 
9
+++++++--
M
src/Sema.zig
 | 
5
+++--

3 files changed, 13 insertions(+), 6 deletions(-)
diff --git a/src/Compilation.zig b/src/Compilation.zig
@@ -1810,8 +1810,9 @@ pub fn getAllErrorsAlloc(self: *Compilation) !AllErrors {
         const compile_log_items = module.compile_log_decls.items();
         if (errors.items.len == 0 and compile_log_items.len != 0) {
             // First one will be the error; subsequent ones will be notes.
+            const src_loc = compile_log_items[0].key.nodeOffsetSrcLoc(compile_log_items[0].value);
             const err_msg = Module.ErrorMsg{
-                .src_loc = compile_log_items[0].value,
+                .src_loc = src_loc,
                 .msg = "found compile log statement",
                 .notes = try self.gpa.alloc(Module.ErrorMsg, compile_log_items.len - 1),
             };
@@ -1819,7 +1820,7 @@ pub fn getAllErrorsAlloc(self: *Compilation) !AllErrors {
 
             for (compile_log_items[1..]) |entry, i| {
                 err_msg.notes[i] = .{
-                    .src_loc = entry.value,
+                    .src_loc = entry.key.nodeOffsetSrcLoc(entry.value),
                     .msg = "also here",
                 };
             }
diff --git a/src/Module.zig b/src/Module.zig
@@ -64,7 +64,8 @@ import_table: std.StringArrayHashMapUnmanaged(*Scope.File) = .{},
 /// a Decl can have a failed_decls entry but have analysis status of success.
 failed_decls: std.AutoArrayHashMapUnmanaged(*Decl, *ErrorMsg) = .{},
 /// Keep track of one `@compileLog` callsite per owner Decl.
-compile_log_decls: std.AutoArrayHashMapUnmanaged(*Decl, SrcLoc) = .{},
+/// The value is the AST node index offset from the Decl.
+compile_log_decls: std.AutoArrayHashMapUnmanaged(*Decl, i32) = .{},
 /// Using a map here for consistency with the other fields here.
 /// The ErrorMsg memory is owned by the `Scope.File`, using Module's general purpose allocator.
 failed_files: std.AutoArrayHashMapUnmanaged(*Scope.File, ?*ErrorMsg) = .{},
@@ -407,10 +408,14 @@ pub const Decl = struct {
     }
 
     pub fn srcLoc(decl: Decl) SrcLoc {
+        return decl.nodeOffsetSrcLoc(0);
+    }
+
+    pub fn nodeOffsetSrcLoc(decl: Decl, node_offset: i32) SrcLoc {
         return .{
             .file_scope = decl.getFileScope(),
             .parent_decl_node = decl.src_node,
-            .lazy = .{ .node_offset = 0 },
+            .lazy = .{ .node_offset = node_offset },
         };
     }
 
diff --git a/src/Sema.zig b/src/Sema.zig
@@ -1661,7 +1661,8 @@ fn zirCompileLog(
     const writer = managed.writer();
 
     const extra = sema.code.extraData(Zir.Inst.NodeMultiOp, extended.operand);
-    const src: LazySrcLoc = .{ .node_offset = extra.data.src_node };
+    const src_node = extra.data.src_node;
+    const src: LazySrcLoc = .{ .node_offset = src_node };
     const args = sema.code.refSlice(extra.end, extended.small);
 
     for (args) |arg_ref, i| {
@@ -1678,7 +1679,7 @@ fn zirCompileLog(
 
     const gop = try sema.mod.compile_log_decls.getOrPut(sema.gpa, sema.owner_decl);
     if (!gop.found_existing) {
-        gop.entry.value = src.toSrcLoc(&block.base);
+        gop.entry.value = src_node;
     }
     return sema.mod.constInst(sema.arena, src, .{
         .ty = Type.initTag(.void),