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1; Test that the isdigit library call simplifier works correctly.2;3; RUN: opt < %s -passes=instcombine -S | FileCheck %s4 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 %ret15; CHECK-NEXT: ret i32 016}17 18define i32 @test_simplify2() {19; CHECK-LABEL: @test_simplify2(20 %ret = call i32 @isdigit(i32 48)21 ret i32 %ret22; CHECK-NEXT: ret i32 123}24 25define i32 @test_simplify3() {26; CHECK-LABEL: @test_simplify3(27 %ret = call i32 @isdigit(i32 57)28 ret i32 %ret29; CHECK-NEXT: ret i32 130}31 32define i32 @test_simplify4() {33; CHECK-LABEL: @test_simplify4(34 %ret = call i32 @isdigit(i32 58)35 ret i32 %ret36; CHECK-NEXT: ret i32 037}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, -4844; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp ult i32 [[ADD]], 1045; CHECK-NEXT: [[ZEXT:%[a-z0-9]+]] = zext i1 [[CMP]] to i3246 ret i32 %ret47; CHECK-NEXT: ret i32 [[ZEXT]]48}49