JIT: Update IL offsets in fgExpandStaticInitForCall (#99662)

* Do not set the code offsets for BBF_INTERNAL blocks

* Setting block->bbCodeOffsEnd to BAD_IL_OFFSET when expanding static init for calls

* Only update IL offsets in fgSplitBlockAfterStatement if the original block had a valid ending offset

* Update IL offsets when expanding static init calls

Author: TIHan

src/coreclr/jit/helperexpansion.cpp

@@ -1503,6 +1503,17 @@ bool Compiler::fgExpandStaticInitForCall(BasicBlock** pBlock, Statement* stmt, G
 
     // Clear gtInitClsHnd as a mark that we've already visited this call
     call->gtInitClsHnd = NO_CLASS_HANDLE;
+
+    // Update the IL offsets of the blocks to match the split.
+
+    // prevBb->bbCodeOffs remains the same
+    block->bbCodeOffsEnd = prevBb->bbCodeOffsEnd;
+
+    IL_OFFSET splitPointILOffset = fgFindBlockILOffset(block);
+
+    prevBb->bbCodeOffsEnd = max(prevBb->bbCodeOffs, splitPointILOffset);
+    block->bbCodeOffs     = min(splitPointILOffset, block->bbCodeOffsEnd);
+
     return true;
 }