[compiler-rt] [llvm] [llvm-cov][gcov] Support multi-files coverage in one basic block (PR #144504)

[Fangrui Song via llvm-commits]

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@@ -311,7 +326,8 @@ class GCOVBlock {
   uint64_t count = 0;
   SmallVector<GCOVArc *, 2> pred;
   SmallVector<GCOVArc *, 2> succ;
-  SmallVector<uint32_t, 4> lines;
+  SmallVector<GCOVLocation, 4> locations;
+  uint32_t lastLine;
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MaskRay wrote:

`= 0`

https://github.com/llvm/llvm-project/pull/144504