1 ; RUN: llc %s -O2 -print-machineinstrs -mtriple=aarch64-linux-gnu -jump-table-density=40 -min-jump-table-entries=0 -o /dev/null 2> %t; FileCheck %s --check-prefixes=CHECK,CHECK0 < %t 2 ; RUN: llc %s -O2 -print-machineinstrs -mtriple=aarch64-linux-gnu -jump-table-density=40 -min-jump-table-entries=4 -o /dev/null 2> %t; FileCheck %s --check-prefixes=CHECK,CHECK4 < %t 3 ; RUN: llc %s -O2 -print-machineinstrs -mtriple=aarch64-linux-gnu -jump-table-density=40 -min-jump-table-entries=8 -o /dev/null 2> %t; FileCheck %s --check-prefixes=CHECK,CHECK8 < %t 4 5 declare void @ext(i32) 6 7 define i32 @jt2(i32 %a, i32 %b) { 8 entry: 9 switch i32 %a, label %return [ 10 i32 1, label %bb1 11 i32 2, label %bb2 12 ] 13 ; CHECK-LABEL: function jt2: 14 ; CHECK0-NEXT: Jump Tables: 15 ; CHECK0-NEXT: %jump-table.0: 16 ; CHECK0-NOT: %jump-table.1: 17 ; CHECK4-NOT: Jump Tables: 18 ; CHECK8-NOT: Jump Tables: 19 20 bb1: tail call void @ext(i32 0) br label %return 21 bb2: tail call void @ext(i32 2) br label %return 22 23 return: ret i32 %b 24 } 25 26 define i32 @jt4(i32 %a, i32 %b) { 27 entry: 28 switch i32 %a, label %return [ 29 i32 1, label %bb1 30 i32 2, label %bb2 31 i32 3, label %bb3 32 i32 4, label %bb4 33 ] 34 ; CHECK-LABEL: function jt4: 35 ; CHECK0-NEXT: Jump Tables: 36 ; CHECK0-NEXT: %jump-table.0: 37 ; CHECK0-NOT: %jump-table.1: 38 ; CHECK4-NEXT: Jump Tables: 39 ; CHECK4-NEXT: %jump-table.0: 40 ; CHECK4-NOT: %jump-table.1: 41 ; CHECK8-NOT: Jump Tables: 42 43 bb1: tail call void @ext(i32 0) br label %return 44 bb2: tail call void @ext(i32 2) br label %return 45 bb3: tail call void @ext(i32 4) br label %return 46 bb4: tail call void @ext(i32 6) br label %return 47 48 return: ret i32 %b 49 } 50 51 define i32 @jt8(i32 %a, i32 %b) { 52 entry: 53 switch i32 %a, label %return [ 54 i32 1, label %bb1 55 i32 2, label %bb2 56 i32 3, label %bb3 57 i32 4, label %bb4 58 i32 5, label %bb5 59 i32 6, label %bb6 60 i32 7, label %bb7 61 i32 8, label %bb8 62 ] 63 ; CHECK-LABEL: function jt8: 64 ; CHECK-NEXT: Jump Tables: 65 ; CHECK-NEXT: %jump-table.0: 66 ; CHECK-NOT: %jump-table.1: 67 68 bb1: tail call void @ext(i32 0) br label %return 69 bb2: tail call void @ext(i32 2) br label %return 70 bb3: tail call void @ext(i32 4) br label %return 71 bb4: tail call void @ext(i32 6) br label %return 72 bb5: tail call void @ext(i32 8) br label %return 73 bb6: tail call void @ext(i32 10) br label %return 74 bb7: tail call void @ext(i32 12) br label %return 75 bb8: tail call void @ext(i32 14) br label %return 76 77 return: ret i32 %b 78 } 79 80
