Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/Transforms/LoopSimplify/unreachable-loop-pred.ll

@@ -1,69 +0,0 @@
-; RUN: opt -S -loop-simplify -disable-output -verify-loop-info -verify-dom-info < %s
-; PR5235
-
-; When loopsimplify inserts a preheader for this loop, it should add the new
-; block to the enclosing loop and not get confused by the unreachable
-; bogus loop entry.
-
-define void @is_extract_cab() nounwind {
-entry:
-  br label %header
-
-header:                                       ; preds = %if.end206, %cond.end66, %if.end23
-  br label %while.body115
-
-while.body115:                                    ; preds = %9, %if.end192, %if.end101
-  br i1 undef, label %header, label %while.body115
-
-foo:
-  br label %while.body115
-}
-
-; When loopsimplify generates dedicated exit block for blocks that are landing
-; pads (i.e. innerLoopExit in this test), we should not get confused with the
-; unreachable pred (unreachableB) to innerLoopExit.
-define align 8 void @baz(i32 %trip) personality i32* ()* @wobble {
-entry:
-  br label %outerHeader
-
-outerHeader:
-  invoke void @foo() 
-          to label %innerPreheader unwind label %innerLoopExit
-
-innerPreheader:
-  br label %innerH
-
-innerH:
-  %tmp50 = invoke i8 * undef()
-          to label %innerLatch unwind label %innerLoopExit
-
-innerLatch:
-  %cmp = icmp slt i32 %trip, 42
-  br i1 %cmp, label %innerH, label %retblock
-
-unreachableB:                                             ; No predecessors!
-  %tmp62 = invoke i8 * undef()
-          to label %retblock unwind label %innerLoopExit
-
-; undedicated exit block (preds from inner and outer loop)
-; Also has unreachableB as pred.
-innerLoopExit:
-  %tmp65 = landingpad { i8*, i32 }
-          cleanup
-  invoke void @foo() 
-          to label %outerHeader unwind label %unwindblock
-
-unwindblock:
-  %tmp67 = landingpad { i8*, i32 }
-          cleanup
-  ret void
-
-retblock:
-  ret void
-}
-
-; Function Attrs: nounwind
-declare i32* @wobble()
-
-; Function Attrs: uwtable
-declare void @foo()