Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/Transforms/LoopUnswitch/simplify-with-nonvalness.ll

@@ -1,58 +0,0 @@
-; RUN: opt < %s -loop-unswitch -verify-loop-info -S < %s 2>&1 | FileCheck %s
-
-; There are 1 case and 1 default case in the switch. after we unswitch, we know the
-; %a is definitely not 0 in one of the unswitched loop, make sure we take advantage
-; of that and simplify the branches in the loop.
-;
-; CHECK: define void @simplify_with_nonvalness(
-
-; This is the loop in which we know %a is definitely 0.
-; CHECK: sw.bb.us:
-; CHECK: br i1 true, label %if.then.us, label %if.end.us
-
-; This is the loop in which we do not know what %a is but we know %a is definitely NOT 0.
-; Make sure we use that information to simplify.
-; The icmp eq i32 %a, 0 in one of the unswitched loop is simplified to false.
-; CHECK: sw.bb.split:
-; CHECK: br i1 false, label %if.then, label %if.end
-
-define void @simplify_with_nonvalness(i32 %a) #0 {
-entry:
-  br label %for.cond
-
-for.cond:
-  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
-  %cmp = icmp slt i32 %i.0, 1024
-  br i1 %cmp, label %for.body, label %for.end
-
-for.body:
-  switch i32 %a, label %sw.default [
-    i32 0, label %sw.bb
-  ]
-
-sw.bb:
-  %cmp1 = icmp eq i32 %a, 0
-  br i1 %cmp1, label %if.then, label %if.end
-
-if.then:
-  call void (...) @bar()
-  br label %if.end
-
-if.end:
-  br label %sw.epilog
-
-sw.default:
-  br label %sw.epilog
-
-sw.epilog:
-  br label %for.inc
-
-for.inc:
-  %inc = add nsw i32 %i.0, 1
-  br label %for.cond
-
-for.end:
-  ret void
-}
-
-declare void @bar(...)