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[CIR][Lowering][Bugfix] Lower nested breaks in switch statements #357

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merged 5 commits into from
Dec 21, 2023

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gitoleg
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@gitoleg gitoleg commented Dec 19, 2023

This PR fixes lowering of the next code:

void foo(int x, int y) {
    switch (x) {
        case 0: 
            if (y) 
                break;
            break;
    }
}

i.e. when some sub statement contains break as well. Previously, we did this trick for loop: process nested break/continue statements while LoopOp lowering if they don't belong to another LoopOp or SwitchOp. This is why there is some refactoring here as well, but the idea is stiil the same: we need to process nested operations and emit branches to the proper blocks.

This is quite frequent bug in llvm-test-suite

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@bcardosolopes bcardosolopes left a comment

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LGTM once the conflict is fixed!

@lanza lanza force-pushed the main branch 2 times, most recently from 05ffb2a to 34fceae Compare December 20, 2023 07:10
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gitoleg commented Dec 20, 2023

@bcardosolopes done!

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LGTM

@bcardosolopes bcardosolopes merged commit d4996dd into llvm:main Dec 21, 2023
4 of 6 checks passed
lanza pushed a commit that referenced this pull request Jan 29, 2024
This PR fixes lowering of the next code: 
```
void foo(int x, int y) {
    switch (x) {
        case 0: 
            if (y) 
                break;
            break;
    }
}
```
i.e. when some sub statement contains `break` as well. Previously, we
did this trick for `loop`: process nested `break`/`continue` statements
while `LoopOp` lowering if they don't belong to another `LoopOp` or
`SwitchOp`. This is why there is some refactoring here as well, but the
idea is stiil the same: we need to process nested operations and emit
branches to the proper blocks.

This is quite frequent bug in `llvm-test-suite`
lanza pushed a commit that referenced this pull request Mar 23, 2024
This PR fixes lowering of the next code: 
```
void foo(int x, int y) {
    switch (x) {
        case 0: 
            if (y) 
                break;
            break;
    }
}
```
i.e. when some sub statement contains `break` as well. Previously, we
did this trick for `loop`: process nested `break`/`continue` statements
while `LoopOp` lowering if they don't belong to another `LoopOp` or
`SwitchOp`. This is why there is some refactoring here as well, but the
idea is stiil the same: we need to process nested operations and emit
branches to the proper blocks.

This is quite frequent bug in `llvm-test-suite`
eZWALT pushed a commit to eZWALT/clangir that referenced this pull request Mar 24, 2024
…m#357)

This PR fixes lowering of the next code: 
```
void foo(int x, int y) {
    switch (x) {
        case 0: 
            if (y) 
                break;
            break;
    }
}
```
i.e. when some sub statement contains `break` as well. Previously, we
did this trick for `loop`: process nested `break`/`continue` statements
while `LoopOp` lowering if they don't belong to another `LoopOp` or
`SwitchOp`. This is why there is some refactoring here as well, but the
idea is stiil the same: we need to process nested operations and emit
branches to the proper blocks.

This is quite frequent bug in `llvm-test-suite`
eZWALT pushed a commit to eZWALT/clangir that referenced this pull request Mar 24, 2024
…m#357)

This PR fixes lowering of the next code: 
```
void foo(int x, int y) {
    switch (x) {
        case 0: 
            if (y) 
                break;
            break;
    }
}
```
i.e. when some sub statement contains `break` as well. Previously, we
did this trick for `loop`: process nested `break`/`continue` statements
while `LoopOp` lowering if they don't belong to another `LoopOp` or
`SwitchOp`. This is why there is some refactoring here as well, but the
idea is stiil the same: we need to process nested operations and emit
branches to the proper blocks.

This is quite frequent bug in `llvm-test-suite`
lanza pushed a commit that referenced this pull request Apr 29, 2024
This PR fixes lowering of the next code: 
```
void foo(int x, int y) {
    switch (x) {
        case 0: 
            if (y) 
                break;
            break;
    }
}
```
i.e. when some sub statement contains `break` as well. Previously, we
did this trick for `loop`: process nested `break`/`continue` statements
while `LoopOp` lowering if they don't belong to another `LoopOp` or
`SwitchOp`. This is why there is some refactoring here as well, but the
idea is stiil the same: we need to process nested operations and emit
branches to the proper blocks.

This is quite frequent bug in `llvm-test-suite`
lanza pushed a commit that referenced this pull request Apr 29, 2024
This PR fixes lowering of the next code: 
```
void foo(int x, int y) {
    switch (x) {
        case 0: 
            if (y) 
                break;
            break;
    }
}
```
i.e. when some sub statement contains `break` as well. Previously, we
did this trick for `loop`: process nested `break`/`continue` statements
while `LoopOp` lowering if they don't belong to another `LoopOp` or
`SwitchOp`. This is why there is some refactoring here as well, but the
idea is stiil the same: we need to process nested operations and emit
branches to the proper blocks.

This is quite frequent bug in `llvm-test-suite`
eZWALT pushed a commit to eZWALT/clangir that referenced this pull request Apr 29, 2024
…m#357)

This PR fixes lowering of the next code: 
```
void foo(int x, int y) {
    switch (x) {
        case 0: 
            if (y) 
                break;
            break;
    }
}
```
i.e. when some sub statement contains `break` as well. Previously, we
did this trick for `loop`: process nested `break`/`continue` statements
while `LoopOp` lowering if they don't belong to another `LoopOp` or
`SwitchOp`. This is why there is some refactoring here as well, but the
idea is stiil the same: we need to process nested operations and emit
branches to the proper blocks.

This is quite frequent bug in `llvm-test-suite`
lanza pushed a commit that referenced this pull request Apr 29, 2024
This PR fixes lowering of the next code:
```
void foo(int x, int y) {
    switch (x) {
        case 0:
            if (y)
                break;
            break;
    }
}
```
i.e. when some sub statement contains `break` as well. Previously, we
did this trick for `loop`: process nested `break`/`continue` statements
while `LoopOp` lowering if they don't belong to another `LoopOp` or
`SwitchOp`. This is why there is some refactoring here as well, but the
idea is stiil the same: we need to process nested operations and emit
branches to the proper blocks.

This is quite frequent bug in `llvm-test-suite`
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2 participants