Revert 131172 as it is causing clang to miscompile itself. I will try

to provide a reduced testcase.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131176 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGen/X86/hoist-common.ll

@@ -1,28 +0,0 @@
-; RUN: llc < %s -march=x86-64  | FileCheck %s
-
-; Common "xorb al, al" instruction in the two successor blocks should be
-; moved to the entry block above the test + je.
-
-; rdar://9145558
-
-define zeroext i1 @t(i32 %c) nounwind ssp {
-entry:
-; CHECK: t:
-; CHECK: xorb %al, %al
-; CHECK: test
-; CHECK: je
-  %tobool = icmp eq i32 %c, 0
-  br i1 %tobool, label %return, label %if.then
-
-if.then:
-; CHECK: callq
-  %call = tail call zeroext i1 (...)* @foo() nounwind
-  br label %return
-
-return:
-; CHECK: ret
-  %retval.0 = phi i1 [ %call, %if.then ], [ false, %entry ]
-  ret i1 %retval.0
-}
-
-declare zeroext i1 @foo(...)