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llvm-mirror/test/CodeGen/X86/adde-carry.ll

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; RUN: llc -march=x86-64 < %s | FileCheck %s -check-prefix=CHECK-64
define void @a(i64* nocapture %s, i64* nocapture %t, i64 %a, i64 %b, i64 %c) nounwind {
entry:
%0 = zext i64 %a to i128
%1 = zext i64 %b to i128
%2 = add i128 %1, %0
%3 = zext i64 %c to i128
%4 = shl i128 %3, 64
%5 = add i128 %4, %2
%6 = lshr i128 %5, 64
%7 = trunc i128 %6 to i64
store i64 %7, i64* %s, align 8
%8 = trunc i128 %2 to i64
store i64 %8, i64* %t, align 8
ret void
; CHECK-64: addq
; CHECK-64: adcq $0
}