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aligns as 8

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Mattthew Heath 2024-12-06 17:33:12 +00:00
parent b33f1b0981
commit 82a70c79b8
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1 changed files with 6 additions and 4 deletions
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10
crates/compiler/builtins/bitcode/src/utils.zig
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@ -75,12 +75,13 @@ comptime {
} }
fn testing_roc_alloc(size: usize, alignment: u32) callconv(.C) ?*anyopaque { fn testing_roc_alloc(size: usize, alignment: u32) callconv(.C) ?*anyopaque {
if (alignment > @alignOf(usize)) { const real_alignment = 8;
@panic("alignments larger than that of usize are not currently supported"); if (alignment > real_alignment) {
@panic("alignments larger than 8 are not currently supported");
} }
// We store an extra usize which is the size of the full allocation. // We store an extra usize which is the size of the full allocation.
const full_size = size + @sizeOf(usize); const full_size = size + @sizeOf(usize);
var raw_ptr = (std.testing.allocator.alignedAlloc(u8, @alignOf(usize), full_size) catch unreachable).ptr; var raw_ptr = (std.testing.allocator.alignedAlloc(u8, real_alignment, full_size) catch unreachable).ptr;
@as([*]usize, @alignCast(@ptrCast(raw_ptr)))[0] = full_size; @as([*]usize, @alignCast(@ptrCast(raw_ptr)))[0] = full_size;
raw_ptr += @sizeOf(usize); raw_ptr += @sizeOf(usize);
const ptr = @as(?*anyopaque, @ptrCast(raw_ptr)); const ptr = @as(?*anyopaque, @ptrCast(raw_ptr));
@ -110,7 +111,8 @@ fn testing_roc_realloc(c_ptr: *anyopaque, new_size: usize, old_size: usize, _: u
} }
fn testing_roc_dealloc(c_ptr: *anyopaque, _: u32) callconv(.C) void { fn testing_roc_dealloc(c_ptr: *anyopaque, _: u32) callconv(.C) void {
const raw_ptr = @as([*]align(@alignOf(usize)) u8, @alignCast(@ptrCast(c_ptr))) - @sizeOf(usize); const actual_alignment = 8;
const raw_ptr = @as([*]align(actual_alignment) u8, @alignCast(@ptrCast(c_ptr))) - @sizeOf(usize);
const full_size = @as([*]usize, @alignCast(@ptrCast(raw_ptr)))[0]; const full_size = @as([*]usize, @alignCast(@ptrCast(raw_ptr)))[0];
const slice = raw_ptr[0..full_size]; const slice = raw_ptr[0..full_size];