[llvm] r324403 - [x86] add test to show missed BMI isel; NFC

[Sanjay Patel via llvm-commits]

Author: spatel
Date: Tue Feb  6 13:18:53 2018
New Revision: 324403

URL: http://llvm.org/viewvc/llvm-project?rev=324403&view=rev
Log:
[x86] add test to show missed BMI isel; NFC

Modified:
    llvm/trunk/test/CodeGen/X86/bmi.ll

Modified: llvm/trunk/test/CodeGen/X86/bmi.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/bmi.ll?rev=324403&r1=324402&r2=324403&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/bmi.ll (original)
+++ llvm/trunk/test/CodeGen/X86/bmi.ll Tue Feb  6 13:18:53 2018
@@ -808,3 +808,18 @@ define i64 @blsr64(i64 %x)   {
   ret i64 %tmp2
 }
 
+; PR35792 - https://bugs.llvm.org/show_bug.cgi?id=35792
+
+define i64 @blsr_disguised_constant(i64 %x) {
+; CHECK-LABEL: blsr_disguised_constant:
+; CHECK:       # %bb.0:
+; CHECK-NEXT:    leal 65535(%rdi), %eax
+; CHECK-NEXT:    andl %edi, %eax
+; CHECK-NEXT:    movzwl %ax, %eax
+; CHECK-NEXT:    retq
+  %a1 = and i64 %x, 65535
+  %a2 = add i64 %x, 65535
+  %r = and i64 %a1, %a2
+  ret i64 %r
+}
+