zig

commit 0bc5e7b5233acdc415e091c4a8c74433b7de2921 (tree)
parent 2703db3b405b45e897231e85ba884543d684f64f
Author: Veikka Tuominen <git@vexu.eu>
Date:   Sun, 14 May 2023 15:24:26 +0300

Sema: use `elemPtrOneLayerOnly` in `zirMemCpy`

Closes #15633

Diffstat:
M
src/Sema.zig
 | 
4
++--
M
test/behavior/memcpy.zig
 | 
13
+++++++++++++

2 files changed, 15 insertions(+), 2 deletions(-)
diff --git a/src/Sema.zig b/src/Sema.zig
@@ -22146,7 +22146,7 @@ fn zirMemcpy(sema: *Sema, block: *Block, inst: Zir.Inst.Index) CompileError!void
             const len = try sema.usizeCast(block, dest_src, len_u64);
             for (0..len) |i| {
                 const elem_index = try sema.addIntUnsigned(Type.usize, i);
-                const dest_elem_ptr = try sema.elemPtr(
+                const dest_elem_ptr = try sema.elemPtrOneLayerOnly(
                     block,
                     src,
                     dest_ptr,
@@ -22155,7 +22155,7 @@ fn zirMemcpy(sema: *Sema, block: *Block, inst: Zir.Inst.Index) CompileError!void
                     true, // init
                     false, // oob_safety
                 );
-                const src_elem_ptr = try sema.elemPtr(
+                const src_elem_ptr = try sema.elemPtrOneLayerOnly(
                     block,
                     src,
                     src_ptr,
diff --git a/test/behavior/memcpy.zig b/test/behavior/memcpy.zig
@@ -65,3 +65,16 @@ fn testMemcpyDestManyPtr() !void {
     try expect(buf[3] == 'l');
     try expect(buf[4] == 'o');
 }
+
+comptime {
+    const S = struct {
+        buffer: [8]u8 = undefined,
+        fn set(self: *@This(), items: []const u8) void {
+            @memcpy(self.buffer[0..items.len], items);
+        }
+    };
+
+    var s = S{};
+    s.set("hello");
+    if (!std.mem.eql(u8, s.buffer[0..5], "hello")) @compileError("bad");
+}