Fix crash introduced in 116852. 8573915.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116955 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index 39d66ad9aff5ce46ae7656242bc6061950ab33b5..c01a9ddb66072c60289ba44032db1c52c72b2603 100644 (file)
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -3457,8 +3457,9 @@ static SDValue LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG,
                                   Op.getOperand(i)));
       SDValue Val = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, &Ops[0],
                                 NumElts);
-      return DAG.getNode(ISD::BIT_CONVERT, dl, VT,
-                         LowerBUILD_VECTOR(Val, DAG, ST));
+      Val = LowerBUILD_VECTOR(Val, DAG, ST);
+      if (Val.getNode())
+        return DAG.getNode(ISD::BIT_CONVERT, dl, VT, Val);
     }
     SDValue Val = IsSingleInstrConstant(Value, DAG, ST, dl);
     if (Val.getNode())

diff --git a/test/CodeGen/Thumb2/buildvector-crash.ll b/test/CodeGen/Thumb2/buildvector-crash.ll
new file mode 100644 (file)
index 0000000..01ef472
--- /dev/null
+++ b/test/CodeGen/Thumb2/buildvector-crash.ll
@@ -0,0 +1,17 @@
+; RUN: llc < %s -O3 -mtriple=thumbv7-apple-darwin10 -mcpu=cortex-a8 | FileCheck %s
+; Formerly crashed, 3573915.
+
+define void @RotateStarsFP_Vec() nounwind {
+bb.nph372:
+  br label %bb8
+
+bb8:                                              ; preds = %bb8, %bb.nph372
+  %0 = fadd <4 x float> undef, <float 0xBFEE353F80000000, float 0xBFEE353F80000000, float 0xBFEE353F80000000, float 0xBFEE353F80000000>
+  %1 = fmul <4 x float> %0, undef
+  %2 = fmul <4 x float> %1, undef
+  %3 = fadd <4 x float> undef, %2
+  store <4 x float> %3, <4 x float>* undef, align 4
+  br label %bb8
+; CHECK: RotateStarsFP_Vec:
+; CHECK: vldmia
+}