Reverting r221626 due to a too-strict test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221629 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/X86/X86InstrCompiler.td

@@ -1191,7 +1191,6 @@ def def32 : PatLeaf<(i32 GR32:$src), [{
   return N->getOpcode() != ISD::TRUNCATE &&
          N->getOpcode() != TargetOpcode::EXTRACT_SUBREG &&
          N->getOpcode() != ISD::CopyFromReg &&
-         N->getOpcode() != ISD::AssertSext &&
          N->getOpcode() != X86ISD::CMOV;
 }]>;
 

test/CodeGen/X86/TruncAssertZext.ll

@@ -1,16 +0,0 @@
-; RUN: llc < %s -O2 -march=x86-64 | FileCheck %s
-; Checks that a zeroing mov is inserted for the trunc/zext pair even when
-; the source of the zext is an AssertSext node
-; PR20494
-
-define i64 @main(i64 %a) { 
-; CHECK-LABEL: main
-; CHECK: movl %ecx, %eax
-; CHECK: ret
-  %or = or i64 %a, -2
-  %trunc = trunc i64 %or to i32
-  br label %l
-l:
-  %ext = zext i32 %trunc to i64
-  ret i64 %ext
-}