| author |  Andrew Kelley <andrew@ziglang.org> 2020-08-22 12:41:51-07:00 |
| committer | Andrew Kelley <andrew@ziglang.org> 2020-08-22 12:44:45-07:00 |
| log | 29051a0674800881957479c423a1feb043391671 |
| tree | 0a3fddfb551f22b15898a7539d7eb187f26f542d |
| parent | 2d402157d9e6ea34499604455cf1270ef7eb5a1f |
stage2: codegen: fix crash
I forgot to do -Denable-qemu -Denable-wasmtime when testing yesterday,
sorry about that.
In reuseOperand, the code assumed a re-used register would be tracked in
the register table but that is not always the case.1 files changed, 3 insertions(+), 2 deletions(-)
src-self-hosted
src-self-hosted/codegen.zig+3-2
| ... | ... | @@ -934,8 +934,9 @@ fn Function(comptime arch: std.Target.Cpu.Arch) type { |
| 934 | 934 | // If it's in the registers table, need to associate the register with the |
| 935 | 935 | // new instruction. |
| 936 | 936 | const branch = &self.branch_stack.items[self.branch_stack.items.len - 1]; |
| 937 | const entry = branch.registers.getEntry(toCanonicalReg(reg)).?; | |
| 938 | entry.value = .{ .inst = inst }; | |
| 937 | if (branch.registers.getEntry(toCanonicalReg(reg))) |entry| { | |
| 938 | entry.value = .{ .inst = inst }; | |
| 939 | } | |
| 939 | 940 | log.debug("reusing {} => {*}", .{reg, inst}); |
| 940 | 941 | }, |
| 941 | 942 | .stack_offset => |off| { |