1 ; RUN: opt < %s -lowerswitch -S | FileCheck %s 2 ; 3 ; The switch is lowered with a single icmp. 4 ; CHECK: icmp 5 ; CHECK-NOT: icmp 6 ; 7 ;int foo(int a) { 8 ; 9 ; switch (a) { 10 ; case 0: 11 ; return 10; 12 ; case 1: 13 ; return 3; 14 ; default: 15 ; __builtin_unreachable(); 16 ; } 17 ; 18 ;} 19 20 define i32 @foo(i32 %a) { 21 %1 = alloca i32, align 4 22 %2 = alloca i32, align 4 23 store i32 %a, i32* %2, align 4 24 %3 = load i32, i32* %2, align 4 25 switch i32 %3, label %6 [ 26 i32 0, label %4 27 i32 1, label %5 28 ] 29 30 ; <label>:4 31 store i32 10, i32* %1 32 br label %7 33 34 ; <label>:5 35 store i32 3, i32* %1 36 br label %7 37 38 ; <label>:6 39 unreachable 40 41 ; <label>:7 42 %8 = load i32, i32* %1 43 ret i32 %8 44 } 45
