Thumb-2 has CLZ.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74322 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index 29d3da2b79c1510752ee79231aba180995815090..c24bb2eb2ba9dbf2a8052dbef099b1bfbfceb2d1 100644 (file)
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -266,7 +266,7 @@ ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
   setOperationAction(ISD::ROTL,  MVT::i32, Expand);
   setOperationAction(ISD::CTTZ,  MVT::i32, Expand);
   setOperationAction(ISD::CTPOP, MVT::i32, Expand);
-  if (!Subtarget->hasV5TOps() || Subtarget->isThumb())
+  if (!Subtarget->hasV5TOps() || Subtarget->isThumb1Only())
     setOperationAction(ISD::CTLZ, MVT::i32, Expand);
 
   // Only ARMv6 has BSWAP.

diff --git a/test/CodeGen/Thumb2/thumb2-clz.ll b/test/CodeGen/Thumb2/thumb2-clz.ll
new file mode 100644 (file)
index 0000000..e5f94a6
--- /dev/null
+++ b/test/CodeGen/Thumb2/thumb2-clz.ll
@@ -0,0 +1,8 @@
+; RUN: llvm-as < %s | llc -march=thumb -mattr=+thumb2,+v7a | grep "clz " | count 1
+
+define i32 @f1(i32 %a) {
+    %tmp = tail call i32 @llvm.ctlz.i32(i32 %a)
+    ret i32 %tmp
+}
+
+declare i32 @llvm.ctlz.i32(i32) nounwind readnone