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1; RUN: mlir-translate -import-llvm %s | FileCheck %s2 3; Test unreachable blocks are dropped.4 5; CHECK-LABEL: llvm.func @unreachable_block6define void @unreachable_block(float %0) {7.entry:8 ; CHECK: llvm.return9 ret void10 11unreachable:12 ; CHECK-NOT: llvm.fadd13 %1 = fadd float %0, %114 br label %unreachable15}16 17; Test unreachable blocks with back edges are supported.18 19; CHECK-LABEL: llvm.func @back_edge20define i32 @back_edge(i32 %0) {21.entry:22 ; CHECK: llvm.br ^[[RET:.*]](%{{.*}})23 br label %ret24ret:25 ; CHECK: ^[[RET]](%{{.*}}: i32)26 %1 = phi i32 [ %0, %.entry ], [ %2, %unreachable ]27 ; CHECK: llvm.return %{{.*}} : i3228 ret i32 %129 30unreachable:31 ; CHECK-NOT: add32 %2 = add i32 %0, %233 %3 = icmp eq i32 %2, 4234 br i1 %3, label %ret, label %unreachable35}36