1 ; Test that the isdigit library call simplifier works correctly.
3 ; RUN: opt < %s -passes=instcombine -S | FileCheck %s
5 target 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"
7 declare i32 @isdigit(i32)
9 ; Check isdigit(c) -> (c - '0') <u 10;
11 define i32 @test_simplify1() {
12 ; CHECK-LABEL: @test_simplify1(
13 %ret = call i32 @isdigit(i32 47)
15 ; CHECK-NEXT: ret i32 0
18 define i32 @test_simplify2() {
19 ; CHECK-LABEL: @test_simplify2(
20 %ret = call i32 @isdigit(i32 48)
22 ; CHECK-NEXT: ret i32 1
25 define i32 @test_simplify3() {
26 ; CHECK-LABEL: @test_simplify3(
27 %ret = call i32 @isdigit(i32 57)
29 ; CHECK-NEXT: ret i32 1
32 define i32 @test_simplify4() {
33 ; CHECK-LABEL: @test_simplify4(
34 %ret = call i32 @isdigit(i32 58)
36 ; CHECK-NEXT: ret i32 0
39 define i32 @test_simplify5(i32 %x) {
40 ; CHECK-LABEL: @test_simplify5(
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
47 ; CHECK-NEXT: ret i32 [[ZEXT]]