Imported Upstream version 5.18.0.234

Former-commit-id: 8071ec1a8c5eaa9be24b41745add19297608001f

external/llvm/test/Transforms/Reassociate/deadcode.ll

@@ -1,37 +0,0 @@
-; RUN: opt < %s -reassociate -disable-output
-
-; It has been detected that dead loops like the one in this test case can be
-; created by -jump-threading (it was detected by a csmith generated program).
-;
-; According to -verify this is valid input (even if it could be discussed if
-; the dead loop really satisfies SSA form).
-;
-; The problem found was that the -reassociate pass ends up in an infinite loop
-; when analysing the 'deadloop1' basic block. See "Bugzilla - Bug 30818".
-define void @deadloop1() {
-  br label %endlabel
-
-deadloop1:
-  %1 = xor i32 %2, 7
-  %2 = xor i32 %1, 8
-  br label %deadloop1
-
-endlabel:
-  ret void
-}
-
-
-; Another example showing that dead code could result in infinite loops in
-; reassociate pass. See "Bugzilla - Bug 30818".
-define void @deadloop2() {
-  br label %endlabel
-
-deadloop2:
-  %1 = and i32 %2, 7
-  %2 = and i32 %3, 8
-  %3 = and i32 %1, 6
-  br label %deadloop2
-
-endlabel:
-  ret void
-}