1 ; RUN: opt < %s -simplifycfg -S | FileCheck %s 2 3 ; a, b; 4 ; fn1() { 5 ; if (b) 6 ; if (a == 0 || a == 5) 7 ; return a; 8 ; return 0; 9 ; } 10 11 ; Checking that we handle correctly the case when we have a switch 12 ; branching multiple times to the same block 13 14 @b = common global i32 0, align 4 15 @a = common global i32 0, align 4 16 17 ; Function Attrs: nounwind 18 define i32 @fn1() { 19 ; CHECK-LABEL: @fn1 20 ; CHECK: %switch.selectcmp1 = icmp eq i32 %1, 5 21 ; CHECK: %switch.select2 = select i1 %switch.selectcmp1, i32 5, i32 %switch.select 22 entry: 23 %0 = load i32, i32* @b, align 4 24 %tobool = icmp eq i32 %0, 0 25 br i1 %tobool, label %if.end3, label %if.then 26 27 if.then: 28 %1 = load i32, i32* @a, align 4 29 switch i32 %1, label %if.end3 [ 30 i32 5, label %return 31 i32 0, label %return 32 ] 33 34 if.end3: 35 br label %return 36 37 return: 38 %retval.0 = phi i32 [ 0, %if.end3 ], [ %1, %if.then ], [ %1, %if.then ] 39 ret i32 %retval.0 40 } 41
