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Introduce two new "add" intrinsics. These return the sum plus a bit indicating
that an overflow/carry occured. These are converted into ISD::[SU]ADDO nodes, which are lowered in a target-independent way into something sane. Eventually, each target can implement their own method of checking the overflow/carry flags. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@59756 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -314,6 +314,15 @@ def int_init_trampoline : Intrinsic<[llvm_ptr_ty],
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[]>,
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GCCBuiltin<"__builtin_init_trampoline">;
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//===------------------------ Overflow Intrinsics -------------------------===//
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//
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// Expose the carry flag from add operations on two integrals.
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def int_sadd_with_overflow : Intrinsic<[llvm_anyint_ty, llvm_i1_ty],
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[LLVMMatchType<0>, LLVMMatchType<0>]>;
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def int_uadd_with_overflow : Intrinsic<[llvm_anyint_ty, llvm_i1_ty],
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[LLVMMatchType<0>, LLVMMatchType<0>]>;
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//===------------------------- Atomic Intrinsics --------------------------===//
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//
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def int_memory_barrier : Intrinsic<[llvm_void_ty],
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