remove-bbs.ll

; Test that llvm-reduce can remove uninteresting Basic Blocks, and remove them from instructions (i.e. SwitchInst, BranchInst and IndirectBrInst)
; Note: if an uninteresting BB is the default case for a switch, the instruction is removed altogether (since the default case cannot be replaced)
;
; RUN: llvm-reduce --test %python --test-arg %p/Inputs/remove-bbs.py %s -o %t
; RUN: cat %t | FileCheck -implicit-check-not=uninteresting %s

definevoid@main() {
interesting:
; CHECK-NOT: switch i32 0, label %uninteresting
switchi320, label%uninteresting [
i320, label%uninteresting
 ]

uninteresting:
retvoid

interesting2:
; CHECK: switch i32 1, label %interesting3
switchi321, label%interesting3 [
; CHECK-NOT: i32 0, label %uninteresting
i320, label%uninteresting
; CHECK: i32 1, label %interesting3
i321, label%interesting3
 ]

interesting3:
; CHECK: br label %interesting2
bri1true, label%interesting2, label%uninteresting
}