1; Test that the abs 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 @abs(i32) 8declare i64 @labs(i64) 9declare i64 @llabs(i64) 10 11; Check abs(x) -> x >s -1 ? x : -x. 12 13define i32 @test_simplify1(i32 %x) { 14; CHECK-LABEL: @test_simplify1( 15 %ret = call i32 @abs(i32 %x) 16; CHECK-NEXT: [[ISPOS:%[a-z0-9]+]] = icmp sgt i32 %x, -1 17; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub i32 0, %x 18; CHECK-NEXT: [[RET:%[a-z0-9]+]] = select i1 [[ISPOS]], i32 %x, i32 [[NEG]] 19 ret i32 %ret 20; CHECK-NEXT: ret i32 [[RET]] 21} 22 23define i64 @test_simplify2(i64 %x) { 24; CHECK-LABEL: @test_simplify2( 25 %ret = call i64 @labs(i64 %x) 26; CHECK-NEXT: [[ISPOS:%[a-z0-9]+]] = icmp sgt i64 %x, -1 27; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub i64 0, %x 28; CHECK-NEXT: [[RET:%[a-z0-9]+]] = select i1 [[ISPOS]], i64 %x, i64 [[NEG]] 29 ret i64 %ret 30; CHECK-NEXT: ret i64 [[RET]] 31} 32 33define i64 @test_simplify3(i64 %x) { 34; CHECK-LABEL: @test_simplify3( 35 %ret = call i64 @llabs(i64 %x) 36; CHECK-NEXT: [[ISPOS:%[a-z0-9]+]] = icmp sgt i64 %x, -1 37; CHECK-NEXT: [[NEG:%[a-z0-9]+]] = sub i64 0, %x 38; CHECK-NEXT: [[RET:%[a-z0-9]+]] = select i1 [[ISPOS]], i64 %x, i64 [[NEG]] 39 ret i64 %ret 40; CHECK-NEXT: ret i64 [[RET]] 41} 42