From: Nemanja Ivanovic <nemanja.i.ibm@gmail.com>
Date: Wed, 2 Dec 2015 10:36:24 +0000 (+0000)
Subject: Patch to fix a crash in the PowerPC back end due to ISD::ROTL and ISD::ROTR
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=8364ade5d93474e14943675f122e0f69c976ff55;p=oota-llvm.git

Patch to fix a crash in the PowerPC back end due to ISD::ROTL and ISD::ROTR
not being expanded. Test case included.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@254501 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index 72a3fbe83e1..176a8b3ea59 100644
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -479,6 +479,8 @@ PPCTargetLowering::PPCTargetLowering(const PPCTargetMachine &TM,
       setOperationAction(ISD::CTTZ_ZERO_UNDEF, VT, Expand);
       setOperationAction(ISD::VSELECT, VT, Expand);
       setOperationAction(ISD::SIGN_EXTEND_INREG, VT, Expand);
+      setOperationAction(ISD::ROTL, VT, Expand);
+      setOperationAction(ISD::ROTR, VT, Expand);
 
       for (MVT InnerVT : MVT::vector_valuetypes()) {
         setTruncStoreAction(VT, InnerVT, Expand);
diff --git a/test/CodeGen/PowerPC/rotl-rotr-crash.ll b/test/CodeGen/PowerPC/rotl-rotr-crash.ll
new file mode 100644
index 00000000000..3fbb67ecf25
--- /dev/null
+++ b/test/CodeGen/PowerPC/rotl-rotr-crash.ll
@@ -0,0 +1,12 @@
+; RUN: llc < %s -mtriple=powerpc64le-unknown-unknown -mcpu=pwr8
+
+; Ensure this does not crash
+
+; Function Attrs: norecurse nounwind
+define <4 x i32> @func1 (<4 x i32> %a) {
+entry:
+  %0 = lshr <4 x i32> %a, <i32 16, i32 16, i32 16, i32 16>
+  %1 = shl <4 x i32> %a, <i32 16, i32 16, i32 16, i32 16>
+  %2 = or <4 x i32> %1, %0
+  ret <4 x i32> %2
+}