1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -S -instcombine %s -o - | FileCheck %s 3 4; All the "useless" instructions should be removed and we shouldn't crash. 5 6target datalayout = "p:16:16" 7 8%i64_t = type i64 9 10@a = external global i16 11@b = external global i16* 12 13define void @f(i1 %cond) { 14; CHECK-LABEL: @f( 15; CHECK-NEXT: bb0: 16; CHECK-NEXT: [[T12:%.*]] = alloca [2 x i32], align 8 17; CHECK-NEXT: [[T12_SUB:%.*]] = getelementptr inbounds [2 x i32], [2 x i32]* [[T12]], i16 0, i16 0 18; CHECK-NEXT: br i1 [[COND:%.*]], label [[BB1:%.*]], label [[BB2:%.*]] 19; CHECK: bb1: 20; CHECK-NEXT: unreachable 21; CHECK: bb2: 22; CHECK-NEXT: [[T9:%.*]] = load i16*, i16** @b, align 2 23; CHECK-NEXT: store i16 0, i16* [[T9]], align 2 24; CHECK-NEXT: [[T10:%.*]] = load i32, i32* [[T12_SUB]], align 8 25; CHECK-NEXT: [[T11:%.*]] = add i32 [[T10]], -1 26; CHECK-NEXT: store i32 [[T11]], i32* [[T12_SUB]], align 8 27; CHECK-NEXT: ret void 28; 29bb0: 30 %t1 = alloca %i64_t 31 %t2 = bitcast %i64_t* %t1 to i32* 32 %useless3 = bitcast %i64_t* %t1 to i16* 33 %useless4 = getelementptr inbounds i16, i16* %useless3, i16 undef 34 %useless5 = bitcast i16* %useless4 to i32* 35 br i1 %cond, label %bb1, label %bb2 36 37bb1: ; preds = %bb0 38 %useless6 = insertvalue [1 x i32*] undef, i32* %t2, 0 39 %useless7 = insertvalue [1 x i32*] %useless6, i32* null, 0 40 %t8 = ptrtoint i32* %t2 to i16 41 store i16 %t8, i16* @a 42 unreachable 43 44bb2: ; preds = %bb0 45 %t9 = load i16*, i16** @b 46 store i16 0, i16* %t9 47 %t10 = load i32, i32* %t2 48 %t11 = sub i32 %t10, 1 49 store i32 %t11, i32* %t2 50 ret void 51} 52