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Zero init stack arrays.

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Nikolay Igotti
2019-12-24 18:47:57 +03:00
committed by Nikolay Igotti
parent 2423f423b0
commit fb062d600a
1 changed files with 9 additions and 1 deletions
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backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/llvm/CodeGenerator.kt
+9 -1
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@@ -486,12 +486,20 @@ internal class FunctionGenerationContext(val function: LLVMValueRef,
} }
fun allocArrayOnStack(arrayTypeName: String, count: LLVMValueRef): LLVMValueRef { fun allocArrayOnStack(arrayTypeName: String, count: LLVMValueRef): LLVMValueRef {
val arraySlot = alloca(localArrayType(arrayTypeName, extractConstUnsignedInt(count).toInt())) val constCount = extractConstUnsignedInt(count).toInt()
val arrayType = localArrayType(arrayTypeName, constCount)
val arraySlot = alloca(arrayType)
// Set array size in ArrayHeader. // Set array size in ArrayHeader.
val arrayHeaderSlot = structGep(arraySlot, 0, "arrayHeader") val arrayHeaderSlot = structGep(arraySlot, 0, "arrayHeader")
setTypeInfoForLocalObject(arrayHeaderSlot) setTypeInfoForLocalObject(arrayHeaderSlot)
val sizeField = structGep(arrayHeaderSlot, 1, "count_") val sizeField = structGep(arrayHeaderSlot, 1, "count_")
store(count, sizeField) store(count, sizeField)
call(context.llvm.memsetFunction,
listOf(bitcast(kInt8Ptr, structGep(arraySlot, 1, "arrayBody")),
Int8(0).llvm,
Int32(constCount * LLVMSizeOfTypeInBits(codegen.llvmTargetData,
arrayToElementType[arrayTypeName]).toInt() / 8).llvm,
Int1(0).llvm))
return bitcast(kObjHeaderPtr, arrayHeaderSlot) return bitcast(kObjHeaderPtr, arrayHeaderSlot)
} }