; RUN: llc < %s -march=x86 | FileCheck %s ; <rdar://problem/8449754> define i32 @test1(i32 %sum, i32 %x) nounwind readnone ssp { entry: ; CHECK: test1: ; CHECK: cmpl %ecx, %eax ; CHECK-NOT: addl ; CHECK: adcl $0, %eax %add4 = add i32 %x, %sum %cmp = icmp ult i32 %add4, %x %inc = zext i1 %cmp to i32 %z.0 = add i32 %add4, %inc ret i32 %z.0 } ; Instcombine transforms test1 into test2: ; CHECK: test2: ; CHECK: movl ; CHECK-NEXT: addl ; CHECK-NEXT: adcl $0 ; CHECK-NEXT: ret define i32 @test2(i32 %sum, i32 %x) nounwind readnone ssp { entry: %uadd = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %x, i32 %sum) %0 = extractvalue { i32, i1 } %uadd, 0 %cmp = extractvalue { i32, i1 } %uadd, 1 %inc = zext i1 %cmp to i32 %z.0 = add i32 %0, %inc ret i32 %z.0 } declare { i32, i1 } @llvm.uadd.with.overflow.i32(i32, i32) nounwind readnone