derek.holloway
7502bf64a4
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37 lines
1.2 KiB
LLVM
37 lines
1.2 KiB
LLVM
; Test that llvm-reduce can remove uninteresting Basic Blocks, and remove them from instructions (i.e. SwitchInst, BranchInst and IndirectBrInst)
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; Note: if an uninteresting BB is the default case for a switch, the instruction is removed altogether (since the default case cannot be replaced)
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;
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; 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
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; RUN: FileCheck -implicit-check-not=uninteresting %s < %t
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; CHECK-INTERESTINGNESS: store i32 0
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; CHECK-INTERESTINGNESS: store i32 1
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; CHECK-INTERESTINGNESS: store i32 2
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define void @main() {
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interesting:
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store i32 0, ptr null
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; CHECK-NOT: switch i32 0, label %uninteresting
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switch i32 0, label %uninteresting [
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i32 1, label %interesting2
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]
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uninteresting:
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ret void
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interesting2:
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store i32 1, ptr null
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; CHECK: switch i32 1, label %interesting3
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switch i32 1, label %interesting3 [
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; CHECK-NOT: i32 0, label %uninteresting
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i32 0, label %uninteresting
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; CHECK: i32 1, label %interesting3
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i32 1, label %interesting3
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]
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interesting3:
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store i32 2, ptr null
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; CHECK: br label %interesting2
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br i1 true, label %interesting2, label %uninteresting
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}
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