zig

commit b2a514b3d2d2d880a41a26e798fb3c9ee014c229 (tree)
parent 16dbb960fc8dada79cd42dd2ba1ebf0f66ccaaec
Author: Veikka Tuominen <git@vexu.eu>
Date:   Wed, 24 May 2023 13:14:16 +0300

Sema: `@memcpy` convert src slice to many ptr

Closes #15838

Diffstat:
M
src/Sema.zig
 | 
4
++++
M
test/behavior/memcpy.zig
 | 
3
++-

2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/src/Sema.zig b/src/Sema.zig
@@ -22235,6 +22235,10 @@ fn zirMemcpy(sema: *Sema, block: *Block, inst: Zir.Inst.Index) CompileError!void
         // Change the dest to a slice, since its type must have the length.
         const dest_ptr_ptr = try sema.analyzeRef(block, dest_src, new_dest_ptr);
         new_dest_ptr = try sema.analyzeSlice(block, dest_src, dest_ptr_ptr, .zero, src_len, .none, .unneeded, dest_src, dest_src, dest_src, false);
+        const new_src_ptr_ty = sema.typeOf(new_src_ptr);
+        if (new_src_ptr_ty.isSlice()) {
+            new_src_ptr = try sema.analyzeSlicePtr(block, src_src, new_src_ptr, new_src_ptr_ty);
+        }
     }
 
     try sema.requireRuntimeBlock(block, src, runtime_src);
diff --git a/test/behavior/memcpy.zig b/test/behavior/memcpy.zig
@@ -58,7 +58,8 @@ test "@memcpy dest many pointer" {
 fn testMemcpyDestManyPtr() !void {
     var str = "hello".*;
     var buf: [5]u8 = undefined;
-    @memcpy(@ptrCast([*]u8, &buf), @ptrCast([*]const u8, &str)[0..5]);
+    var len: usize = 5;
+    @memcpy(@ptrCast([*]u8, &buf), @ptrCast([*]const u8, &str)[0..len]);
     try expect(buf[0] == 'h');
     try expect(buf[1] == 'e');
     try expect(buf[2] == 'l');