Add rev16 test... xfail for now

llvm-svn: 75012

Author: David Goodwin

llvm/test/CodeGen/Thumb2/thumb2-rev16.ll

@@ -0,0 +1,32 @@
+; XFAIL: *
+; fixme rev16 pattern is not matching
+
+; RUN: llvm-as < %s | llc -march=thumb -mattr=+thumb2 | grep {rev16\\W*r\[0-9\]*,\\W*r\[0-9\]*} | count 1
+
+; 0xff00ff00 = 4278255360
+; 0x00ff00ff = 16711935
+define i32 @f1(i32 %a) {
+    %l8 = shl i32 %a, 8
+    %r8 = lshr i32 %a, 8
+    %mask_l8 = and i32 %l8, 4278255360
+    %mask_r8 = and i32 %r8, 16711935
+    %tmp = or i32 %mask_l8, %mask_r8
+    ret i32 %tmp
+}
+
+; 0xff000000 = 4278190080
+; 0x00ff0000 = 16711680
+; 0x0000ff00 = 65280
+; 0x000000ff = 255
+define i32 @f2(i32 %a) {
+    %l8 = shl i32 %a, 8
+    %r8 = lshr i32 %a, 8
+    %masklo_l8 = and i32 %l8, 65280
+    %maskhi_l8 = and i32 %l8, 4278190080
+    %masklo_r8 = and i32 %r8, 255
+    %maskhi_r8 = and i32 %r8, 16711680
+    %tmp1 = or i32 %masklo_l8, %masklo_r8
+    %tmp2 = or i32 %maskhi_l8, %maskhi_r8
+    %tmp = or i32 %tmp1, %tmp2
+    ret i32 %tmp
+}