1 files changed, 59 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/ARM/ParallelDSP/smlad8.ll b/llvm/test/CodeGen/ARM/ParallelDSP/smlad8.ll
new file mode 100644
index 00000000000..6c35685f558
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/ParallelDSP/smlad8.ll
@@ -0,0 +1,59 @@
+; RUN: opt -mtriple=arm-arm-eabi -mcpu=cortex-m33 < %s -arm-parallel-dsp -S | FileCheck %s
+;
+; Mul with operands that are not simple load and sext/zext chains: this is not
+; yet supported so the rewrite shouldn't trigger (but we do want to support this
+; soon).
+;
+; CHECK-NOT:  call i32 @llvm.arm.smlad
+;
+define dso_local i32 @test(i32 %arg, i32* nocapture readnone %arg1, i16* nocapture readonly %arg2, i16* nocapture readonly %arg3, i16* %arg4) {
+entry:
+  %cmp24 = icmp sgt i32 %arg, 0
+  br i1 %cmp24, label %for.body.preheader, label %for.cond.cleanup
+
+for.body.preheader:
+  %.pre = load i16, i16* %arg3, align 2
+  %.pre27 = load i16, i16* %arg2, align 2
+  %gep0 = getelementptr inbounds i16, i16* %arg4, i32 0
+  %gep1 = getelementptr inbounds i16, i16* %arg4, i32 1
+  %.add4 = load i16, i16* %gep0, align 2
+  %.add5 = load i16, i16* %gep1, align 2
+  %.zext4 = zext i16 %.add4 to i32
+  %.zext5 = zext i16 %.add5 to i32
+  br label %for.body
+
+for.cond.cleanup:
+  %mac1.0.lcssa = phi i32 [ 0, %entry ], [ %add11, %for.body ]
+  ret i32 %mac1.0.lcssa
+
+for.body:
+  %mac1.026 = phi i32 [ %add11, %for.body ], [ 0, %for.body.preheader ]
+  %i.025 = phi i32 [ %add, %for.body ], [ 0, %for.body.preheader ]
+  %arrayidx = getelementptr inbounds i16, i16* %arg3, i32 %i.025
+  %0 = load i16, i16* %arrayidx, align 2
+  %add = add nuw nsw i32 %i.025, 1
+  %arrayidx1 = getelementptr inbounds i16, i16* %arg3, i32 %add
+  %1 = load i16, i16* %arrayidx1, align 2
+  %arrayidx3 = getelementptr inbounds i16, i16* %arg2, i32 %i.025
+  %2 = load i16, i16* %arrayidx3, align 2
+  %conv = sext i16 %2 to i32
+  %conv4 = sext i16 %0 to i32
+  %add1 = add i32 %conv, %.zext4
+
+; This mul has a more complicated pattern as an operand, %add1
+; is another add and load, which we don't support for now.
+  %mul = mul nsw i32 %add1, %conv4
+  %arrayidx6 = getelementptr inbounds i16, i16* %arg2, i32 %add
+  %3 = load i16, i16* %arrayidx6, align 2
+  %conv7 = sext i16 %3 to i32
+  %conv8 = sext i16 %1 to i32
+  %add2 = add i32 %conv7, %.zext5
+
+; Same here
+  %mul9 = mul nsw i32 %add2, %conv8
+  %add10 = add i32 %mul, %mac1.026
+
+  %add11 = add i32 %mul9, %add10
+  %exitcond = icmp ne i32 %add, %arg
+  br i1 %exitcond, label %for.body, label %for.cond.cleanup
+}