35 lines
772 B
LLVM
35 lines
772 B
LLVM
; RUN: mlir-translate -import-llvm %s | FileCheck %s
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; Test unreachable blocks are dropped.
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; CHECK-LABEL: llvm.func @unreachable_block
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define void @unreachable_block(float %0) {
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.entry:
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; CHECK: llvm.return
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ret void
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unreachable:
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; CHECK-NOT: llvm.fadd
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%1 = fadd float %0, %1
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br label %unreachable
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}
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; Test unreachable blocks with back edges are supported.
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; CHECK-LABEL: llvm.func @back_edge
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define i32 @back_edge(i32 %0) {
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.entry:
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; CHECK: llvm.br ^[[RET:.*]](%{{.*}})
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br label %ret
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ret:
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; CHECK: ^[[RET]](%{{.*}}: i32)
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%1 = phi i32 [ %0, %.entry ], [ %2, %unreachable ]
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; CHECK: llvm.return %{{.*}} : i32
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ret i32 %1
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unreachable:
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; CHECK-NOT: add
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%2 = add i32 %0, %2
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%3 = icmp eq i32 %2, 42
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br i1 %3, label %ret, label %unreachable
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}
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