1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -instcombine -S | FileCheck %s 3 4; Fold 5; x s/EXACT (-1 << y) 6; to 7; -(x a>>EXACT y) 8 9define i8 @t0(i8 %x) { 10; CHECK-LABEL: @t0( 11; CHECK-NEXT: [[DIV_NEG:%.*]] = ashr exact i8 [[X:%.*]], 5 12; CHECK-NEXT: [[DIV:%.*]] = sub nsw i8 0, [[DIV_NEG]] 13; CHECK-NEXT: ret i8 [[DIV]] 14; 15 %div = sdiv exact i8 %x, -32 16 ret i8 %div 17} 18define i8 @n1(i8 %x) { 19; CHECK-LABEL: @n1( 20; CHECK-NEXT: [[DIV:%.*]] = sdiv i8 [[X:%.*]], -32 21; CHECK-NEXT: ret i8 [[DIV]] 22; 23 %div = sdiv i8 %x, -32 ; not exact 24 ret i8 %div 25} 26 27define <2 x i8> @t2_vec_splat(<2 x i8> %x) { 28; CHECK-LABEL: @t2_vec_splat( 29; CHECK-NEXT: [[DIV_NEG:%.*]] = ashr exact <2 x i8> [[X:%.*]], <i8 5, i8 5> 30; CHECK-NEXT: [[DIV:%.*]] = sub nsw <2 x i8> zeroinitializer, [[DIV_NEG]] 31; CHECK-NEXT: ret <2 x i8> [[DIV]] 32; 33 %div = sdiv exact <2 x i8> %x, <i8 -32, i8 -32> 34 ret <2 x i8> %div 35} 36 37define <2 x i8> @t3_vec(<2 x i8> %x) { 38; CHECK-LABEL: @t3_vec( 39; CHECK-NEXT: [[DIV_NEG:%.*]] = ashr exact <2 x i8> [[X:%.*]], <i8 5, i8 4> 40; CHECK-NEXT: [[DIV:%.*]] = sub <2 x i8> zeroinitializer, [[DIV_NEG]] 41; CHECK-NEXT: ret <2 x i8> [[DIV]] 42; 43 %div = sdiv exact <2 x i8> %x, <i8 -32, i8 -16> 44 ret <2 x i8> %div 45} 46 47define <2 x i8> @n4_vec_mixed(<2 x i8> %x) { 48; CHECK-LABEL: @n4_vec_mixed( 49; CHECK-NEXT: [[DIV:%.*]] = sdiv exact <2 x i8> [[X:%.*]], <i8 -32, i8 16> 50; CHECK-NEXT: ret <2 x i8> [[DIV]] 51; 52 %div = sdiv exact <2 x i8> %x, <i8 -32, i8 16> 53 ret <2 x i8> %div 54} 55 56define <2 x i8> @n4_vec_undef(<2 x i8> %x) { 57; CHECK-LABEL: @n4_vec_undef( 58; CHECK-NEXT: ret <2 x i8> undef 59; 60 %div = sdiv exact <2 x i8> %x, <i8 -32, i8 undef> 61 ret <2 x i8> %div 62} 63