1 ; Test that the abs library call simplifier works correctly. 2 ; 3 ; RUN: opt < %s -instcombine -S | FileCheck %s 4 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" 6 7 declare i32 @abs(i32) 8 declare i64 @labs(i64) 9 declare i64 @llabs(i64) 10 11 ; Check abs(x) -> x >s -1 ? x : -x. 12 13 define 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 23 define 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 33 define 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
