[VE] Change to expand BRCOND

[kaz7]

Summary

VE doesn't have BRCOND instruction, so need to expand it. Also add
a regression test.

llvm/lib/Target/VE/VEISelLowering.cpp

VETargetLowering::VETargetLowering(const TargetMachine &TM,
   setOperationAction(ISD::VAEND, MVT::Other, Expand);
   /// } VAARG handling
 
   /// Stack {
   setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Custom);
   setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64, Custom);
   /// } Stack
 
+  /// Branch {
+  // VE doesn't have BRCOND
+  setOperationAction(ISD::BRCOND, MVT::Other, Expand);
+  /// } Branch
+
   /// Int Ops {
   for (MVT IntVT : {MVT::i32, MVT::i64}) {
     // VE has no REM or DIVREM operations.
     setOperationAction(ISD::UREM, IntVT, Expand);
     setOperationAction(ISD::SREM, IntVT, Expand);
     setOperationAction(ISD::SDIVREM, IntVT, Expand);
     setOperationAction(ISD::UDIVREM, IntVT, Expand);
 

llvm/test/CodeGen/VE/brcond.ll

+; RUN: llc < %s -mtriple=ve | FileCheck %s
+
+; Function Attrs: nounwind
+define void @test_then(i1 zeroext %0) {
+; CHECK-LABEL: test_then:
+; CHECK:       .LBB{{[0-9]+}}_4:
+; CHECK-NEXT:    breq.w 0, %s0, .LBB{{[0-9]+}}_2
+; CHECK-NEXT:  # %bb.1:
+; CHECK-NEXT:    #APP
+; CHECK-NEXT:    nop
+; CHECK-NEXT:    #NO_APP
+; CHECK-NEXT:  .LBB{{[0-9]+}}_2:
+; CHECK-NEXT:    or %s11, 0, %s9
+  br i1 %0, label %2, label %3
+
+2:                                                ; preds = %1
+  tail call void asm sideeffect "nop", ""()
+  br label %3
+
+3:                                                ; preds = %2, %1
+  ret void
+}
+
+; Function Attrs: nounwind
+define void @test_else(i1 zeroext %0) {
+; CHECK-LABEL: test_else:
+; CHECK:       .LBB{{[0-9]+}}_4:
+; CHECK-NEXT:    brne.w 0, %s0, .LBB{{[0-9]+}}_2
+; CHECK-NEXT:  # %bb.1:
+; CHECK-NEXT:    #APP
+; CHECK-NEXT:    nop
+; CHECK-NEXT:    #NO_APP
+; CHECK-NEXT:  .LBB{{[0-9]+}}_2:
+; CHECK-NEXT:    or %s11, 0, %s9
+  br i1 %0, label %3, label %2
+
+2:                                                ; preds = %1
+  tail call void asm sideeffect "nop", ""()
+  br label %3
+
+3:                                                ; preds = %2, %1
+  ret void
+}