In TrimAllocationToSize, if a block is below the minimum allocation size,
there is no new block added to the free list. Therefore on the next
startFunctionBody call, a new slab must be allocated.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77520 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ExecutionEngine/JIT/JITMemoryManager.cpp b/lib/ExecutionEngine/JIT/JITMemoryManager.cpp
index 2d64fcf..3f38f9c 100644
--- a/lib/ExecutionEngine/JIT/JITMemoryManager.cpp
+++ b/lib/ExecutionEngine/JIT/JITMemoryManager.cpp
@@ -351,9 +351,12 @@
iter = iter->Next;
}
+ largest = largest - sizeof(MemoryRangeHeader);
+
// If this block isn't big enough for the allocation desired, allocate
// another block of memory and add it to the free list.
- if (largest - sizeof(MemoryRangeHeader) < ActualSize) {
+ if (largest < ActualSize ||
+ largest <= FreeRangeHeader::getMinBlockSize()) {
DOUT << "JIT: Allocating another slab of memory for function.";
candidateBlock = allocateNewCodeSlab((size_t)ActualSize);
}