1; RUN: llc < %s -march=x86 | FileCheck %s 2; <rdar://problem/8449754> 3 4define i32 @test1(i32 %sum, i32 %x) nounwind readnone ssp { 5entry: 6; CHECK: test1: 7; CHECK: cmpl %ecx, %eax 8; CHECK-NOT: addl 9; CHECK: adcl $0, %eax 10 %add4 = add i32 %x, %sum 11 %cmp = icmp ult i32 %add4, %x 12 %inc = zext i1 %cmp to i32 13 %z.0 = add i32 %add4, %inc 14 ret i32 %z.0 15} 16 17; Instcombine transforms test1 into test2: 18; CHECK: test2: 19; CHECK: movl 20; CHECK-NEXT: addl 21; CHECK-NEXT: adcl $0 22; CHECK-NEXT: ret 23define i32 @test2(i32 %sum, i32 %x) nounwind readnone ssp { 24entry: 25 %uadd = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %x, i32 %sum) 26 %0 = extractvalue { i32, i1 } %uadd, 0 27 %cmp = extractvalue { i32, i1 } %uadd, 1 28 %inc = zext i1 %cmp to i32 29 %z.0 = add i32 %0, %inc 30 ret i32 %z.0 31} 32 33declare { i32, i1 } @llvm.uadd.with.overflow.i32(i32, i32) nounwind readnone 34