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| author | Jakub Konka <kubkon@jakubkonka.com> | 2022-03-24 16:38:04 +0100 |
|---|---|---|
| committer | Jakub Konka <kubkon@jakubkonka.com> | 2022-03-24 17:02:29 +0100 |
| commit | 9d2ff7ed161ff0880818002fb75391be336b44ac (patch) | |
| tree | 758f51a4bc527ab90589bd6efc802fc8e0c8d1e1 | |
| parent | 77352c5bea7e328006394b93bc239c3e34b464c9 (diff) | |
| download | zig-9d2ff7ed161ff0880818002fb75391be336b44ac.tar.gz zig-9d2ff7ed161ff0880818002fb75391be336b44ac.zip | |
x64: fix struct_field_val for structs fitting in register
| -rw-r--r-- | src/arch/x86_64/CodeGen.zig | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/src/arch/x86_64/CodeGen.zig b/src/arch/x86_64/CodeGen.zig index f72086b23b..fe59cd6c63 100644 --- a/src/arch/x86_64/CodeGen.zig +++ b/src/arch/x86_64/CodeGen.zig @@ -2884,6 +2884,8 @@ fn airStructFieldVal(self: *Self, inst: Air.Inst.Index) !void { break :blk dst_mcv; } }; + dst_mcv.freezeIfRegister(&self.register_manager); + defer dst_mcv.unfreezeIfRegister(&self.register_manager); // Shift by struct_field_offset. const shift = @intCast(u8, struct_field_offset * @sizeOf(usize)); @@ -2893,7 +2895,9 @@ fn airStructFieldVal(self: *Self, inst: Air.Inst.Index) !void { const max_reg_bit_width = Register.rax.size(); const mask_shift = @intCast(u6, (max_reg_bit_width - struct_field_ty.bitSize(self.target.*))); const mask = (~@as(u64, 0)) >> mask_shift; - try self.genBinMathOpMir(.@"and", Type.usize, dst_mcv, .{ .immediate = mask }); + + const tmp_reg = try self.copyToTmpRegister(Type.usize, .{ .immediate = mask }); + try self.genBinMathOpMir(.@"and", Type.usize, dst_mcv, .{ .register = tmp_reg }); break :result dst_mcv; }, |