| ; Test that the isdigit library call simplifier works correctly. |
| ; |
| ; RUN: opt < %s -passes=instcombine -S | FileCheck %s |
| |
| 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" |
| |
| declare i32 @isdigit(i32) |
| |
| ; Check isdigit(c) -> (c - '0') <u 10; |
| |
| define i32 @test_simplify1() { |
| ; CHECK-LABEL: @test_simplify1( |
| %ret = call i32 @isdigit(i32 47) |
| ret i32 %ret |
| ; CHECK-NEXT: ret i32 0 |
| } |
| |
| define i32 @test_simplify2() { |
| ; CHECK-LABEL: @test_simplify2( |
| %ret = call i32 @isdigit(i32 48) |
| ret i32 %ret |
| ; CHECK-NEXT: ret i32 1 |
| } |
| |
| define i32 @test_simplify3() { |
| ; CHECK-LABEL: @test_simplify3( |
| %ret = call i32 @isdigit(i32 57) |
| ret i32 %ret |
| ; CHECK-NEXT: ret i32 1 |
| } |
| |
| define i32 @test_simplify4() { |
| ; CHECK-LABEL: @test_simplify4( |
| %ret = call i32 @isdigit(i32 58) |
| ret i32 %ret |
| ; CHECK-NEXT: ret i32 0 |
| } |
| |
| define i32 @test_simplify5(i32 %x) { |
| ; CHECK-LABEL: @test_simplify5( |
| |
| %ret = call i32 @isdigit(i32 %x) |
| ; CHECK-NEXT: [[ADD:%[a-z0-9]+]] = add i32 %x, -48 |
| ; CHECK-NEXT: [[CMP:%[a-z0-9]+]] = icmp ult i32 [[ADD]], 10 |
| ; CHECK-NEXT: [[ZEXT:%[a-z0-9]+]] = zext i1 [[CMP]] to i32 |
| ret i32 %ret |
| ; CHECK-NEXT: ret i32 [[ZEXT]] |
| } |