[flang-commits] [flang] [Flang] malloc(1) on AIX as malloc(0) returns nullptr (PR #73878)

[Daniel Chen via flang-commits]

================
@@ -75,7 +75,14 @@ RT_API_ATTRS int CFI_allocate(CFI_cdesc_t *descriptor,
     dim->sm = byteSize;
     byteSize *= extent;
   }
+#ifdef _AIX
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DanielCChen wrote:

I think we could just do 
```
  void *p = byteSize ? std::malloc(byteSize) : nullptr;
```
Because the next check would already issue CFI_ERROR_MEM_ALLOCATION if `byteSize` is zero.

https://github.com/llvm/llvm-project/pull/73878