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Commit53c8d6c

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Fix illegal attribute propagation in LLVM JIT.
Commit7255943 started copying more attributes from AttributeTemplateto the functions we generate on the fly. In the case of deformfunctions, which return void, this meant that "noundef", fromAttributeTemplate's return value (a Datum) was copied to a void type.Older LLVM releases were OK with that, but LLVM 18 crashes.Update our llvm_copy_attributes() function to skip copying the attributefor the return value, if the target function returns void.Thanks to Dmitry Dolgov for help chasing this down.Back-patch to all supported releases, like7255943.Reported-by: Pavel Stehule <pavel.stehule@gmail.com>Reviewed-by: Dmitry Dolgov <9erthalion6@gmail.com>Discussion:https://postgr.es/m/CAFj8pRACpVFr7LMdVYENUkScG5FCYMZDDdSGNU-tch%2Bw98OxYg%40mail.gmail.com
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‎src/backend/jit/llvm/llvmjit.c

Lines changed: 5 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -552,8 +552,11 @@ llvm_copy_attributes(LLVMValueRef v_from, LLVMValueRef v_to)
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/* copy function attributes */
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llvm_copy_attributes_at_index(v_from,v_to,LLVMAttributeFunctionIndex);
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/* and the return value attributes */
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llvm_copy_attributes_at_index(v_from,v_to,LLVMAttributeReturnIndex);
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if (LLVMGetTypeKind(LLVMGetFunctionReturnType(v_to))!=LLVMVoidTypeKind)
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{
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/* and the return value attributes */
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llvm_copy_attributes_at_index(v_from,v_to,LLVMAttributeReturnIndex);
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}
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/* and each function parameter's attribute */
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param_count=LLVMCountParams(v_from);

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