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 72a3fbe83e13e34cd681f39f9b8d9e6ca3e4422a..176a8b3ea59b976e6e1557afbc79391b59c617cb 100644 (file)
--- 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 (file)
index 0000000..3fbb67e
--- /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
+}