Use new test infrastructure to test simdloop

src/llvm-simdloop.cpp

@@ -144,8 +144,14 @@ void LowerSIMDLoop::enableUnsafeAlgebraIfReduction(PHINode *Phi, Loop *L) const
 
 bool LowerSIMDLoop::runOnLoop(Loop *L, LPPassManager &LPM)
 {
- if (!simd_loop_mdkind)
- return false; // Fast rejection test.
+ if (!simd_loop_mdkind) {
+ simd_loop_mdkind = L->getHeader()->getContext().getMDKindID("simd_loop");
+#if JL_LLVM_VERSION >= 30600
+ simd_loop_md = MDNode::get(L->getHeader()->getContext(), ArrayRef<Metadata*>());
+#else
+ simd_loop_md = MDNode::get(L->getHeader()->getContext(), ArrayRef<Value*>());
+#endif
+ }
 
  if (!hasSIMDLoopMetadata(L))
  return false;

test/llvmpasses/simdloop.ll

@@ -0,0 +1,22 @@
+; RUN: opt -load libjulia.so -LowerSIMDLoop -S %s | FileCheck %s
+
+define void @simd_test(double *%a, double *%b) {
+top:
+ br label %loop
+loop:
+ %i = phi i64 [0, %top], [%nexti, %loop]
+ %aptr = getelementptr double, double *%a, i64 %i
+ %bptr = getelementptr double, double *%b, i64 %i
+; CHECK: llvm.mem.parallel_loop_access
+ %aval = load double, double *%aptr 
+ %bval = load double, double *%aptr 
+ %cval = fadd double %aval, %bval
+ store double %cval, double *%bptr
+ %nexti = add i64 %i, 1, !simd_loop !1
+ %done = icmp sgt i64 %nexti, 500
+ br i1 %done, label %loopdone, label %loop
+loopdone:
+ ret void
+}
+
+!1 = !{}