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[DebugInfo] Fix undef debug values being removed

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Emil Pedersen
2024-04-25 17:38:55 -07:00
parent 9c9f14f6d3
commit c2c16f53dd
5 changed files with 22 additions and 8 deletions
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docs/HowToUpdateDebugInfo.md
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@@ -219,7 +219,7 @@ debug_value undef : $Int, let, name "x", expr op_consts:1:op_fragment:#Int._valu
```
> [!Caution]
> This currently doesn't work, such debug values are dropped.
> This currently doesn't work, an implicit op_deref is added.
### Undef variables
@@ -230,9 +230,6 @@ optimized away, an undef debug value should still be kept:
debug_value undef : $Int, let, name "x"
```
> [!Caution]
> This currently doesn't work, such debug values are dropped.
Additionally, if a previous `debug_value` exists for the variable, a debug value
of undef invalidates the previous value, in case the value of the variable isn't
known anymore: