1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -passes=instcombine -S | FileCheck %s 3 4declare void @use.i8(i8) 5define i8 @fold_add_zext_eq_0(i8 %x) { 6; CHECK-LABEL: @fold_add_zext_eq_0( 7; CHECK-NEXT: [[R:%.*]] = call i8 @llvm.umax.i8(i8 [[X:%.*]], i8 1) 8; CHECK-NEXT: ret i8 [[R]] 9; 10 %x_eq = icmp eq i8 %x, 0 11 %x_eq_ext = zext i1 %x_eq to i8 12 %r = add i8 %x, %x_eq_ext 13 ret i8 %r 14} 15 16define <2 x i8> @fold_add_sext_eq_4_6(<2 x i6> %xx) { 17; CHECK-LABEL: @fold_add_sext_eq_4_6( 18; CHECK-NEXT: [[X:%.*]] = zext <2 x i6> [[XX:%.*]] to <2 x i8> 19; CHECK-NEXT: [[X_EQ:%.*]] = icmp eq <2 x i8> [[X]], <i8 4, i8 -127> 20; CHECK-NEXT: [[R:%.*]] = select <2 x i1> [[X_EQ]], <2 x i8> <i8 3, i8 -128>, <2 x i8> [[X]] 21; CHECK-NEXT: ret <2 x i8> [[R]] 22; 23 %x = zext <2 x i6> %xx to <2 x i8> 24 %x_eq = icmp eq <2 x i8> %x, <i8 4, i8 129> 25 %x_eq_ext = sext <2 x i1> %x_eq to <2 x i8> 26 %r = add <2 x i8> %x_eq_ext, %x 27 ret <2 x i8> %r 28} 29 30define i8 @fold_add_zext_eq_0_fail_multiuse_exp(i8 %x) { 31; CHECK-LABEL: @fold_add_zext_eq_0_fail_multiuse_exp( 32; CHECK-NEXT: [[X_EQ:%.*]] = icmp eq i8 [[X:%.*]], 0 33; CHECK-NEXT: [[X_EQ_EXT:%.*]] = zext i1 [[X_EQ]] to i8 34; CHECK-NEXT: [[R:%.*]] = add i8 [[X]], [[X_EQ_EXT]] 35; CHECK-NEXT: call void @use.i8(i8 [[X_EQ_EXT]]) 36; CHECK-NEXT: ret i8 [[R]] 37; 38 %x_eq = icmp eq i8 %x, 0 39 %x_eq_ext = zext i1 %x_eq to i8 40 %r = add i8 %x, %x_eq_ext 41 call void @use.i8(i8 %x_eq_ext) 42 ret i8 %r 43} 44 45define i8 @fold_add_sext_eq_4_fail_wrong_cond(i8 %x, i8 %y) { 46; CHECK-LABEL: @fold_add_sext_eq_4_fail_wrong_cond( 47; CHECK-NEXT: [[X_EQ:%.*]] = icmp eq i8 [[Y:%.*]], 4 48; CHECK-NEXT: [[X_EQ_EXT:%.*]] = sext i1 [[X_EQ]] to i8 49; CHECK-NEXT: [[R:%.*]] = add i8 [[X:%.*]], [[X_EQ_EXT]] 50; CHECK-NEXT: call void @use.i8(i8 [[X_EQ_EXT]]) 51; CHECK-NEXT: ret i8 [[R]] 52; 53 %x_eq = icmp eq i8 %y, 4 54 %x_eq_ext = sext i1 %x_eq to i8 55 %r = add i8 %x, %x_eq_ext 56 call void @use.i8(i8 %x_eq_ext) 57 ret i8 %r 58} 59