Implement Jakob's suggestion on how to detect fall thought without calling

[oota-llvm.git] / test / CodeGen / Thumb2 / thumb2-rev.ll

diff --git a/test/CodeGen/Thumb2/thumb2-rev.ll b/test/CodeGen/Thumb2/thumb2-rev.ll
index 4009da33b260795d764e66b2cc6879203976dd74..2cee2e3d6fcea219300b19e6d164ff421b4b542e 100644 (file)
--- a/test/CodeGen/Thumb2/thumb2-rev.ll
+++ b/test/CodeGen/Thumb2/thumb2-rev.ll
@@ -1,8 +1,23 @@
-; RUN: llvm-as < %s | llc -march=thumb -mattr=+thumb2,+v7a | grep {rev\\W*r\[0-9\]*,\\W*r\[0-9\]*} | count 1
+; RUN: llc < %s -march=thumb -mattr=+thumb2,+v7a,+t2xtpk | FileCheck %s
 
 define i32 @f1(i32 %a) {
+; CHECK: f1:
+; CHECK: rev r0, r0
     %tmp = tail call i32 @llvm.bswap.i32(i32 %a)
     ret i32 %tmp
 }
 
 declare i32 @llvm.bswap.i32(i32) nounwind readnone
+
+define i32 @f2(i32 %X) {
+; CHECK: f2:
+; CHECK: revsh r0, r0
+        %tmp1 = lshr i32 %X, 8
+        %tmp1.upgrd.1 = trunc i32 %tmp1 to i16
+        %tmp3 = trunc i32 %X to i16
+        %tmp2 = and i16 %tmp1.upgrd.1, 255
+        %tmp4 = shl i16 %tmp3, 8
+        %tmp5 = or i16 %tmp2, %tmp4
+        %tmp5.upgrd.2 = sext i16 %tmp5 to i32
+        ret i32 %tmp5.upgrd.2
+}