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Sema: @memcpy convert src slice to many ptr

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Closes #15838
This commit is contained in:
Veikka Tuominen 2023-05-24 13:14:16 +03:00
parent 16dbb960fc
commit b2a514b3d2
2 changed files with 6 additions and 1 deletions
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4
src/Sema.zig
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@ -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. // 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); 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); 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); try sema.requireRuntimeBlock(block, src, runtime_src);

3
test/behavior/memcpy.zig
View File

@ -58,7 +58,8 @@ test "@memcpy dest many pointer" {
fn testMemcpyDestManyPtr() !void { fn testMemcpyDestManyPtr() !void {
var str = "hello".*; var str = "hello".*;
var buf: [5]u8 = undefined; 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[0] == 'h');
try expect(buf[1] == 'e'); try expect(buf[1] == 'e');
try expect(buf[2] == 'l'); try expect(buf[2] == 'l');