[NFC] Added test for PR33549

diff --git a/llvm/test/Transforms/GVN/pr33549.ll b/llvm/test/Transforms/GVN/pr33549.ll
new file mode 100644 (file)
index 0000000..7155ba4
--- /dev/null
+++ b/llvm/test/Transforms/GVN/pr33549.ll
@@ -0,0 +1,91 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -gvn -S < %s | FileCheck %s
+
+@Data = common local_unnamed_addr global [32 x i32] zeroinitializer, align 4
+
+; Function Attrs: norecurse nounwind
+define void @testshl() local_unnamed_addr #0 {
+; CHECK-LABEL: @testshl(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br label [[FOR_BODY:%.*]]
+; CHECK:       for.body:
+; CHECK-NEXT:    [[K_031:%.*]] = phi i32 [ 1, [[ENTRY:%.*]] ], [ [[INC9:%.*]], [[FOR_INC8:%.*]] ]
+; CHECK-NEXT:    [[SHL:%.*]] = shl i32 1, [[K_031]]
+; CHECK-NEXT:    [[SHR:%.*]] = ashr exact i32 [[SHL]], 1
+; CHECK-NEXT:    [[CMP229:%.*]] = icmp slt i32 [[SHL]], 64
+; CHECK-NEXT:    br i1 [[CMP229]], label [[FOR_BODY3_PREHEADER:%.*]], label [[FOR_INC8]]
+; CHECK:       for.body3.preheader:
+; CHECK-NEXT:    [[DIV:%.*]] = sdiv i32 [[SHR]], 2
+; CHECK-NEXT:    br label [[FOR_BODY3:%.*]]
+; CHECK:       for.body3:
+; CHECK-NEXT:    [[I_030:%.*]] = phi i32 [ [[INC:%.*]], [[FOR_BODY3]] ], [ [[DIV]], [[FOR_BODY3_PREHEADER]] ]
+; CHECK-NEXT:    [[ADD:%.*]] = add nsw i32 [[I_030]], [[SHR]]
+; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds [32 x i32], [32 x i32]* @Data, i32 0, i32 [[ADD]]
+; CHECK-NEXT:    [[ARRAYIDX4:%.*]] = getelementptr inbounds [32 x i32], [32 x i32]* @Data, i32 0, i32 [[I_030]]
+; CHECK-NEXT:    [[TMP0:%.*]] = load i32, i32* [[ARRAYIDX]], align 4, [[TBAA3:!tbaa !.*]]
+; CHECK-NEXT:    [[TMP1:%.*]] = load i32, i32* [[ARRAYIDX4]], align 4, [[TBAA3]]
+; CHECK-NEXT:    [[SUB:%.*]] = sub nsw i32 [[TMP1]], [[TMP0]]
+; CHECK-NEXT:    store i32 [[SUB]], i32* [[ARRAYIDX]], align 4, [[TBAA3]]
+; CHECK-NEXT:    [[ADD7:%.*]] = add nsw i32 [[TMP1]], [[TMP0]]
+; CHECK-NEXT:    store i32 [[ADD7]], i32* [[ARRAYIDX4]], align 4, [[TBAA3]]
+; CHECK-NEXT:    [[INC]] = add nsw i32 [[I_030]], 1
+; CHECK-NEXT:    [[CMP2:%.*]] = icmp slt i32 [[I_030]], 15
+; CHECK-NEXT:    br i1 [[CMP2]], label [[FOR_BODY3]], label [[FOR_INC8]]
+; CHECK:       for.inc8:
+; CHECK-NEXT:    [[INC9]] = add nuw nsw i32 [[K_031]], 1
+; CHECK-NEXT:    [[EXITCOND:%.*]] = icmp eq i32 [[INC9]], 8
+; CHECK-NEXT:    br i1 [[EXITCOND]], label [[FOR_END10:%.*]], label [[FOR_BODY]]
+; CHECK:       for.end10:
+; CHECK-NEXT:    ret void
+;
+entry:
+  br label %for.body
+
+for.body:                                         ; preds = %for.inc8, %entry
+  %k.031 = phi i32 [ 1, %entry ], [ %inc9, %for.inc8 ]
+  %shl = shl i32 1, %k.031
+  %shr = ashr exact i32 %shl, 1
+  %cmp229 = icmp slt i32 %shl, 64
+  br i1 %cmp229, label %for.body3.preheader, label %for.inc8
+
+for.body3.preheader:                              ; preds = %for.body
+  %div = sdiv i32 %shr, 2
+  br label %for.body3
+
+for.body3:                                        ; preds = %for.body3.preheader, %for.body3
+  %i.030 = phi i32 [ %inc, %for.body3 ], [ %div, %for.body3.preheader ]
+  %add = add nsw i32 %i.030, %shr
+  %arrayidx = getelementptr inbounds [32 x i32], [32 x i32]* @Data, i32 0, i32 %add
+  %arrayidx4 = getelementptr inbounds [32 x i32], [32 x i32]* @Data, i32 0, i32 %i.030
+  %0 = load i32, i32* %arrayidx, align 4, !tbaa !3
+  %1 = load i32, i32* %arrayidx4, align 4, !tbaa !3
+  %sub = sub nsw i32 %1, %0
+  store i32 %sub, i32* %arrayidx, align 4, !tbaa !3
+  %2 = load i32, i32* %arrayidx4, align 4, !tbaa !3
+  %add7 = add nsw i32 %2, %0
+  store i32 %add7, i32* %arrayidx4, align 4, !tbaa !3
+  %inc = add nsw i32 %i.030, 1
+  %cmp2 = icmp slt i32 %i.030, 15
+  br i1 %cmp2, label %for.body3, label %for.inc8
+
+for.inc8:                                         ; preds = %for.body3, %for.body
+  %inc9 = add nuw nsw i32 %k.031, 1
+  %exitcond = icmp eq i32 %inc9, 8
+  br i1 %exitcond, label %for.end10, label %for.body
+
+for.end10:                                        ; preds = %for.inc8
+  ret void
+}
+
+attributes #0 = { norecurse nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="cortex-m7" "target-features"="+d16,+dsp,+fp-armv8,+hwdiv,+strict-align,+thumb-mode" "unsafe-fp-math"="false" "use-soft-float"="false" }
+
+!llvm.module.flags = !{!0, !1}
+!llvm.ident = !{!2}
+
+!0 = !{i32 1, !"wchar_size", i32 4}
+!1 = !{i32 1, !"min_enum_size", i32 4}
+!2 = !{!"clang version 5.0.0 (http://llvm.org/git/clang.git 100ecde90ef26ee81763214d5fb335415ffc2b53) (http://llvm.org/git/llvm.git f2fe26d60eb81a699f2d565e8baabcaf32f9c5ea)"}
+!3 = !{!4, !4, i64 0}
+!4 = !{!"int", !5, i64 0}
+!5 = !{!"omnipotent char", !6, i64 0}
+!6 = !{!"Simple C/C++ TBAA"}