1; Test that the isdigit library call simplifier works correctly.
2;
3; RUN: opt < %s -instcombine -S | FileCheck %s
4
5target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
6
7declare i32 @isdigit(i32)
8
9; Check isdigit(c) -> (c - '0') <u 10;
10
11define i32 @test_simplify1() {
12; CHECK-LABEL: @test_simplify1(
13  %ret = call i32 @isdigit(i32 47)
14  ret i32 %ret
15; CHECK-NEXT: ret i32 0
16}
17
18define i32 @test_simplify2() {
19; CHECK-LABEL: @test_simplify2(
20  %ret = call i32 @isdigit(i32 48)
21  ret i32 %ret
22; CHECK-NEXT: ret i32 1
23}
24
25define i32 @test_simplify3() {
26; CHECK-LABEL: @test_simplify3(
27  %ret = call i32 @isdigit(i32 57)
28  ret i32 %ret
29; CHECK-NEXT: ret i32 1
30}
31
32define i32 @test_simplify4() {
33; CHECK-LABEL: @test_simplify4(
34  %ret = call i32 @isdigit(i32 58)
35  ret i32 %ret
36; CHECK-NEXT: ret i32 0
37}
38
39define i32 @test_simplify5(i32 %x) {
40; CHECK-LABEL: @test_simplify5(
41
42  %ret = call i32 @isdigit(i32 %x)
43; CHECK-NEXT: [[ADD:%[a-z0-9]+]] = add i32 %x, -48
44; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp ult i32 [[ADD]], 10
45; CHECK-NEXT: [[ZEXT:%[a-z0-9]+]] = zext i1 [[CMP]] to i32
46  ret i32 %ret
47; CHECK-NEXT: ret i32 [[ZEXT]]
48}
49