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| author | joachimschmidt557 <joachim.schmidt557@outlook.com> | 2021-03-27 22:23:14 +0100 |
|---|---|---|
| committer | Jakub Konka <kubkon@jakubkonka.com> | 2021-03-31 23:27:50 +0200 |
| commit | 1b657e6e41bcaf362d1cc9455c17e06e57973554 (patch) | |
| tree | 796f29c590abe7d5dc5d0ab5ad195ab8a890e7d0 /src | |
| parent | e088a17f56a154ecc43c36e8308833d657e6f43e (diff) | |
| download | zig-1b657e6e41bcaf362d1cc9455c17e06e57973554.tar.gz zig-1b657e6e41bcaf362d1cc9455c17e06e57973554.zip | |
stage2 codegen: Make sure function return value is in a callee
preserved register
Diffstat (limited to 'src')
| -rw-r--r-- | src/codegen.zig | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/codegen.zig b/src/codegen.zig index 6365d66ec6..bc3480ca01 100644 --- a/src/codegen.zig +++ b/src/codegen.zig @@ -2194,6 +2194,16 @@ fn Function(comptime arch: std.Target.Cpu.Arch) type { unreachable; } + switch (info.return_value) { + .register => |reg| { + if (Register.allocIndex(reg) == null) { + // Save function return value in a callee saved register + return try self.copyToNewRegister(&inst.base, info.return_value); + } + }, + else => {}, + } + return info.return_value; } |