1 files changed, 76 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/ARM/ParallelDSP/smlad11.ll b/llvm/test/CodeGen/ARM/ParallelDSP/smlad11.ll
new file mode 100644
index 00000000000..04586e66930
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/ParallelDSP/smlad11.ll
@@ -0,0 +1,76 @@
+; REQUIRES: asserts
+; RUN: opt -mtriple=arm-arm-eabi -mcpu=cortex-m33 < %s -arm-parallel-dsp -S -stats 2>&1 | FileCheck %s
+;
+; A more complicated chain: 4 mul operations, so we expect 2 smlad calls.
+;
+; CHECK:  %mac1{{\.}}054 = phi i32 [ [[V17:%[0-9]+]], %for.body ], [ 0, %for.body.preheader ]
+; CHECK:  [[V8:%[0-9]+]] = bitcast i16* %arrayidx8 to i32*
+; CHECK:  [[V9:%[0-9]+]] = load i32, i32* [[V8]], align 2
+; CHECK:  [[V10:%[0-9]+]] = bitcast i16* %arrayidx to i32*
+; CHECK:  [[V11:%[0-9]+]] = load i32, i32* [[V10]], align 2
+; CHECK:  [[V12:%[0-9]+]] = call i32 @llvm.arm.smlad(i32 [[V9]], i32 [[V11]], i32 %mac1{{\.}}054)
+; CHECK:  [[V13:%[0-9]+]] = bitcast i16* %arrayidx17 to i32*
+; CHECK:  [[V14:%[0-9]+]] = load i32, i32* [[V13]], align 2
+; CHECK:  [[V15:%[0-9]+]] = bitcast i16* %arrayidx4 to i32*
+; CHECK:  [[V16:%[0-9]+]] = load i32, i32* [[V15]], align 2
+; CHECK:  [[V17:%[0-9]+]] = call i32 @llvm.arm.smlad(i32 [[V14]], i32 [[V16]], i32 [[V12]])
+;
+; And we don't want to see a 3rd smlad:
+; CHECK-NOT: call i32 @llvm.arm.smlad
+;
+; CHECK:  2 arm-parallel-dsp - Number of smlad instructions generated
+;
+define dso_local i32 @test(i32 %arg, i32* nocapture readnone %arg1, i16* nocapture readonly %arg2, i16* nocapture readonly %arg3) {
+entry:
+  %cmp52 = icmp sgt i32 %arg, 0
+  br i1 %cmp52, label %for.body.preheader, label %for.cond.cleanup
+
+for.cond.cleanup:
+  %mac1.0.lcssa = phi i32 [ 0, %entry ], [ %add28, %for.body ]
+  ret i32 %mac1.0.lcssa
+
+for.body.preheader:
+  br label %for.body
+
+for.body:
+  %mac1.054 = phi i32 [ %add28, %for.body ], [ 0, %for.body.preheader ]
+  %i.053 = phi i32 [ %add29, %for.body ], [ 0, %for.body.preheader ]
+  %arrayidx = getelementptr inbounds i16, i16* %arg3, i32 %i.053
+  %0 = load i16, i16* %arrayidx, align 2
+  %add1 = or i32 %i.053, 1
+  %arrayidx2 = getelementptr inbounds i16, i16* %arg3, i32 %add1
+  %1 = load i16, i16* %arrayidx2, align 2
+  %add3 = or i32 %i.053, 2
+  %arrayidx4 = getelementptr inbounds i16, i16* %arg3, i32 %add3
+  %2 = load i16, i16* %arrayidx4, align 2
+  %add5 = or i32 %i.053, 3
+  %arrayidx6 = getelementptr inbounds i16, i16* %arg3, i32 %add5
+  %3 = load i16, i16* %arrayidx6, align 2
+  %arrayidx8 = getelementptr inbounds i16, i16* %arg2, i32 %i.053
+  %4 = load i16, i16* %arrayidx8, align 2
+  %conv = sext i16 %4 to i32
+  %conv9 = sext i16 %0 to i32
+  %mul = mul nsw i32 %conv, %conv9
+  %arrayidx11 = getelementptr inbounds i16, i16* %arg2, i32 %add1
+  %5 = load i16, i16* %arrayidx11, align 2
+  %conv12 = sext i16 %5 to i32
+  %conv13 = sext i16 %1 to i32
+  %mul14 = mul nsw i32 %conv12, %conv13
+  %arrayidx17 = getelementptr inbounds i16, i16* %arg2, i32 %add3
+  %6 = load i16, i16* %arrayidx17, align 2
+  %conv18 = sext i16 %6 to i32
+  %conv19 = sext i16 %2 to i32
+  %mul20 = mul nsw i32 %conv18, %conv19
+  %arrayidx23 = getelementptr inbounds i16, i16* %arg2, i32 %add5
+  %7 = load i16, i16* %arrayidx23, align 2
+  %conv24 = sext i16 %7 to i32
+  %conv25 = sext i16 %3 to i32
+  %mul26 = mul nsw i32 %conv24, %conv25
+  %add15 = add i32 %mul, %mac1.054
+  %add21 = add i32 %add15, %mul14
+  %add27 = add i32 %add21, %mul20
+  %add28 = add i32 %add27, %mul26
+  %add29 = add nuw nsw i32 %i.053, 4
+  %cmp = icmp slt i32 %add29, %arg
+  br i1 %cmp, label %for.body, label %for.cond.cleanup
+}