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; 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 -abort-on-invalid-reduction --delta-passes=basic-blocks --test FileCheck --test-arg --check-prefix=CHECK-INTERESTINGNESS --test-arg %s --test-arg --input-file %s -o %t
; RUN: FileCheck -implicit-check-not=uninteresting %s < %t
; CHECK-INTERESTINGNESS: store i32 0
; CHECK-INTERESTINGNESS: store i32 1
; CHECK-INTERESTINGNESS: store i32 2
define void @main() {
interesting:
store i32 0, ptr null
; CHECK-NOT: switch i32 0, label %uninteresting
switch i32 0, label %uninteresting [
i32 1, label %interesting2
]
uninteresting:
ret void
interesting2:
store i32 1, ptr null
; CHECK: switch i32 1, label %interesting3
switch i32 1, label %interesting3 [
; CHECK-NOT: i32 0, label %uninteresting
i32 0, label %uninteresting
; CHECK: i32 1, label %interesting3
i32 1, label %interesting3
]
interesting3:
store i32 2, ptr null
; CHECK: br label %interesting2
br i1 true, label %interesting2, label %uninteresting
}
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