define i32 @test1(i32 %sum, i32 %x) nounwind readnone ssp {
entry:
-; CHECK: test1:
-; CHECK: cmpl %ecx, %eax
-; CHECK-NOT: addl
-; CHECK: adcl $0, %eax
+; CHECK-LABEL: test1:
+; CHECK: movl
+; CHECK-NEXT: addl
+; CHECK-NEXT: adcl $0
+; CHECK-NEXT: ret
%add4 = add i32 %x, %sum
%cmp = icmp ult i32 %add4, %x
%inc = zext i1 %cmp to i32
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 {
+; <rdar://problem/12579915>
+define i32 @test2(i32 %x, i32 %y, i32 %res) nounwind uwtable 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
+ %cmp = icmp ugt i32 %x, %y
+ %dec = sext i1 %cmp to i32
+ %dec.res = add nsw i32 %dec, %res
+ ret i32 %dec.res
+; CHECK-LABEL: test2:
+; CHECK: cmpl
+; CHECK: sbbl
+; CHECK: ret
}
-
-declare { i32, i1 } @llvm.uadd.with.overflow.i32(i32, i32) nounwind readnone