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llvm: fix load of packed struct that was initialized through pointers

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This commit is contained in:
Jacob Young
2023-07-29 02:07:52 -04:00
committed by Xavier Bouchoux
parent 85315bb535
commit 6bb10c7271
1 changed files with 15 additions and 1 deletions
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16
src/codegen/llvm.zig
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@@ -10378,7 +10378,21 @@ pub const FuncGen = struct {
if (isByRef(elem_ty, mod)) {
return self.loadByRef(ptr, elem_ty, ptr_alignment, access_kind);
}
return self.wip.load(access_kind, try o.lowerType(elem_ty), ptr, ptr_alignment, "");
const llvm_elem_ty = try o.lowerType(elem_ty);
const llvm_load_ty = if (elem_ty.isAbiInt(mod))
try o.builder.intType(@intCast(elem_ty.abiSize(mod) * 8))
else
llvm_elem_ty;
const loaded = try self.wip.load(access_kind, llvm_load_ty, ptr, ptr_alignment, "");
const shifted = if (llvm_elem_ty != llvm_load_ty and o.target.cpu.arch.endian() == .Big)
try self.wip.bin(.lshr, loaded, try o.builder.intValue(
llvm_load_ty,
(elem_ty.abiSize(mod) - (std.math.divCeil(u64, elem_ty.bitSize(mod), 8) catch
unreachable)) * 8,
), "")
else
loaded;
return self.wip.conv(.unneeded, shifted, llvm_elem_ty, "");
}
const containing_int_ty = try o.builder.intType(@intCast(info.packed_offset.host_size * 8));