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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; RUN: opt < %s -passes=instcombine -S | FileCheck %s3 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, 011 %x_eq_ext = zext i1 %x_eq to i812 %r = add i8 %x, %x_eq_ext13 ret i8 %r14}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, %x27 ret <2 x i8> %r28}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:%.*]], 033; CHECK-NEXT: [[X_EQ_EXT:%.*]] = zext i1 [[X_EQ]] to i834; 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, 039 %x_eq_ext = zext i1 %x_eq to i840 %r = add i8 %x, %x_eq_ext41 call void @use.i8(i8 %x_eq_ext)42 ret i8 %r43}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:%.*]], 448; CHECK-NEXT: [[X_EQ_EXT:%.*]] = sext i1 [[X_EQ]] to i849; 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, 454 %x_eq_ext = sext i1 %x_eq to i855 %r = add i8 %x, %x_eq_ext56 call void @use.i8(i8 %x_eq_ext)57 ret i8 %r58}59