[NFC][PhaseOrdering] Add one more test for SROA after partial unroll

https://reviews.llvm.org/D136806

diff --git a/llvm/test/Transforms/PhaseOrdering/X86/SROA-after-final-loop-unrolling-2.ll b/llvm/test/Transforms/PhaseOrdering/X86/SROA-after-final-loop-unrolling-2.ll
new file mode 100644 (file)
index 0000000..7fbd275
--- /dev/null
+++ b/llvm/test/Transforms/PhaseOrdering/X86/SROA-after-final-loop-unrolling-2.ll
@@ -0,0 +1,177 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -O3 -S                   | FileCheck %s
+; RUN: opt < %s -passes="default<O3>" -S | FileCheck %s
+
+; LoopFullUnrollPass will not preform non-full unrolling,
+; yet until we unroll at least 2x,
+; the loads/stores into `%i3 = alloca %t0, align 4`
+; happen at non-constant indexes.
+
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-pc-linux-gnu"
+
+%t0 = type { [2 x i32] }
+
+$_ZNSt5arrayIiLm2EEixEm = comdat any
+
+$_ZNSt14__array_traitsIiLm2EE6_S_refERA2_Kim = comdat any
+
+@global = private unnamed_addr constant %t0 { [2 x i32] [i32 24, i32 42] }, align 4
+
+; Function Attrs: mustprogress nounwind uwtable
+define dso_local void @foo(i32 noundef %arg, ptr noundef nonnull align 4 dereferenceable(8) %arg1) #0 {
+; CHECK-LABEL: @foo(
+; CHECK-NEXT:  bb:
+; CHECK-NEXT:    [[I3:%.*]] = alloca [[T0:%.*]], align 8
+; CHECK-NEXT:    call void @llvm.lifetime.start.p0(i64 8, ptr nonnull [[I3]]) #[[ATTR2:[0-9]+]]
+; CHECK-NEXT:    store i64 180388626456, ptr [[I3]], align 8
+; CHECK-NEXT:    [[I9:%.*]] = sdiv i32 [[ARG:%.*]], 128
+; CHECK-NEXT:    [[I10:%.*]] = shl nsw i32 [[I9]], 7
+; CHECK-NEXT:    [[ARG_OFF:%.*]] = add i32 [[ARG]], 127
+; CHECK-NEXT:    [[TMP0:%.*]] = icmp ult i32 [[ARG_OFF]], 255
+; CHECK-NEXT:    br i1 [[TMP0]], label [[BB12:%.*]], label [[BB13_PREHEADER:%.*]]
+; CHECK:       bb13.preheader:
+; CHECK-NEXT:    [[I5_I_I_1:%.*]] = getelementptr inbounds [2 x i32], ptr [[I3]], i64 0, i64 1
+; CHECK-NEXT:    [[I3_PROMOTED:%.*]] = load i32, ptr [[I3]], align 8, !tbaa [[TBAA5:![0-9]+]]
+; CHECK-NEXT:    [[I5_I_I_1_PROMOTED:%.*]] = load i32, ptr [[I5_I_I_1]], align 4, !tbaa [[TBAA5]]
+; CHECK-NEXT:    br label [[BB13:%.*]]
+; CHECK:       bb12.loopexit:
+; CHECK-NEXT:    store i32 [[I21_2:%.*]], ptr [[I3]], align 8, !tbaa [[TBAA5]]
+; CHECK-NEXT:    store i32 [[I21_3:%.*]], ptr [[I5_I_I_1]], align 4, !tbaa [[TBAA5]]
+; CHECK-NEXT:    [[DOTPRE:%.*]] = load i64, ptr [[I3]], align 8, !tbaa [[TBAA9:![0-9]+]]
+; CHECK-NEXT:    br label [[BB12]]
+; CHECK:       bb12:
+; CHECK-NEXT:    [[TMP1:%.*]] = phi i64 [ [[DOTPRE]], [[BB12_LOOPEXIT:%.*]] ], [ 180388626456, [[BB:%.*]] ]
+; CHECK-NEXT:    store i64 [[TMP1]], ptr [[ARG1:%.*]], align 4, !tbaa [[TBAA9]]
+; CHECK-NEXT:    call void @llvm.lifetime.end.p0(i64 8, ptr nonnull [[I3]]) #[[ATTR2]]
+; CHECK-NEXT:    ret void
+; CHECK:       bb13:
+; CHECK-NEXT:    [[I21_113:%.*]] = phi i32 [ [[I5_I_I_1_PROMOTED]], [[BB13_PREHEADER]] ], [ [[I21_3]], [[BB13]] ]
+; CHECK-NEXT:    [[I20_212:%.*]] = phi i32 [ [[I3_PROMOTED]], [[BB13_PREHEADER]] ], [ [[I21_2]], [[BB13]] ]
+; CHECK-NEXT:    [[I4_05:%.*]] = phi i32 [ 0, [[BB13_PREHEADER]] ], [ [[I24_3:%.*]], [[BB13]] ]
+; CHECK-NEXT:    [[I21:%.*]] = mul nsw i32 [[I20_212]], [[I4_05]]
+; CHECK-NEXT:    [[I24:%.*]] = or i32 [[I4_05]], 1
+; CHECK-NEXT:    [[I21_1:%.*]] = mul nsw i32 [[I21_113]], [[I24]]
+; CHECK-NEXT:    [[I24_1:%.*]] = or i32 [[I4_05]], 2
+; CHECK-NEXT:    [[I21_2]] = mul nsw i32 [[I21]], [[I24_1]]
+; CHECK-NEXT:    [[I24_2:%.*]] = or i32 [[I4_05]], 3
+; CHECK-NEXT:    [[I21_3]] = mul nsw i32 [[I21_1]], [[I24_2]]
+; CHECK-NEXT:    [[I24_3]] = add nuw nsw i32 [[I4_05]], 4
+; CHECK-NEXT:    [[I11_NOT_3:%.*]] = icmp eq i32 [[I24_3]], [[I10]]
+; CHECK-NEXT:    br i1 [[I11_NOT_3]], label [[BB12_LOOPEXIT]], label [[BB13]], !llvm.loop [[LOOP10:![0-9]+]]
+;
+bb:
+  %i = alloca i32, align 4
+  %i2 = alloca ptr, align 8
+  %i3 = alloca %t0, align 4
+  %i4 = alloca i32, align 4
+  %i5 = alloca ptr, align 8
+  store i32 %arg, ptr %i, align 4, !tbaa !5
+  store ptr %arg1, ptr %i2, align 8, !tbaa !9
+  call void @llvm.lifetime.start.p0(i64 8, ptr %i3) #3
+  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %i3, ptr align 4 @global, i64 8, i1 false)
+  call void @llvm.lifetime.start.p0(i64 4, ptr %i4) #3
+  store i32 0, ptr %i4, align 4, !tbaa !5
+  br label %bb6
+
+bb6:                                              ; preds = %bb22, %bb
+  %i7 = load i32, ptr %i4, align 4, !tbaa !5
+  %i8 = load i32, ptr %i, align 4, !tbaa !5
+  %i9 = sdiv i32 %i8, 128
+  %i10 = mul nsw i32 128, %i9
+  %i11 = icmp ne i32 %i7, %i10
+  br i1 %i11, label %bb13, label %bb12
+
+bb12:                                             ; preds = %bb6
+  call void @llvm.lifetime.end.p0(i64 4, ptr %i4) #3
+  br label %bb25
+
+bb13:                                             ; preds = %bb6
+  call void @llvm.lifetime.start.p0(i64 8, ptr %i5) #3
+  %i14 = load i32, ptr %i4, align 4, !tbaa !5
+  %i15 = srem i32 %i14, 2
+  %i16 = sext i32 %i15 to i64
+  %i17 = call noundef nonnull align 4 dereferenceable(4) ptr @wibble(ptr noundef nonnull align 4 dereferenceable(8) %i3, i64 noundef %i16) #3
+  store ptr %i17, ptr %i5, align 8, !tbaa !9
+  %i18 = load i32, ptr %i4, align 4, !tbaa !5
+  %i19 = load ptr, ptr %i5, align 8, !tbaa !9
+  %i20 = load i32, ptr %i19, align 4, !tbaa !5
+  %i21 = mul nsw i32 %i20, %i18
+  store i32 %i21, ptr %i19, align 4, !tbaa !5
+  call void @llvm.lifetime.end.p0(i64 8, ptr %i5) #3
+  br label %bb22
+
+bb22:                                             ; preds = %bb13
+  %i23 = load i32, ptr %i4, align 4, !tbaa !5
+  %i24 = add nsw i32 %i23, 1
+  store i32 %i24, ptr %i4, align 4, !tbaa !5
+  br label %bb6, !llvm.loop !11
+
+bb25:                                             ; preds = %bb12
+  %i26 = load ptr, ptr %i2, align 8, !tbaa !9
+  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %i26, ptr align 4 %i3, i64 8, i1 false), !tbaa.struct !13
+  call void @llvm.lifetime.end.p0(i64 8, ptr %i3) #3
+  ret void
+}
+
+; Function Attrs: argmemonly nocallback nofree nosync nounwind willreturn
+declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1
+
+; Function Attrs: argmemonly nocallback nofree nounwind willreturn
+declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2
+
+; Function Attrs: mustprogress nounwind uwtable
+define linkonce_odr dso_local noundef nonnull align 4 dereferenceable(4) ptr @wibble(ptr noundef nonnull align 4 dereferenceable(8) %arg, i64 noundef %arg1) #0 comdat($_ZNSt5arrayIiLm2EEixEm) align 2 {
+bb:
+  %i = alloca ptr, align 8
+  %i2 = alloca i64, align 8
+  store ptr %arg, ptr %i, align 8, !tbaa !9
+  store i64 %arg1, ptr %i2, align 8, !tbaa !15
+  %i3 = load ptr, ptr %i, align 8
+  %i4 = getelementptr inbounds %t0, ptr %i3, i32 0, i32 0
+  %i5 = load i64, ptr %i2, align 8, !tbaa !15
+  %i6 = call noundef nonnull align 4 dereferenceable(4) ptr @widget(ptr noundef nonnull align 4 dereferenceable(8) %i4, i64 noundef %i5) #3
+  ret ptr %i6
+}
+
+; Function Attrs: argmemonly nocallback nofree nosync nounwind willreturn
+declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1
+
+; Function Attrs: mustprogress nounwind uwtable
+define linkonce_odr dso_local noundef nonnull align 4 dereferenceable(4) ptr @widget(ptr noundef nonnull align 4 dereferenceable(8) %arg, i64 noundef %arg1) #0 comdat($_ZNSt14__array_traitsIiLm2EE6_S_refERA2_Kim) align 2 {
+bb:
+  %i = alloca ptr, align 8
+  %i2 = alloca i64, align 8
+  store ptr %arg, ptr %i, align 8, !tbaa !9
+  store i64 %arg1, ptr %i2, align 8, !tbaa !15
+  %i3 = load ptr, ptr %i, align 8, !tbaa !9
+  %i4 = load i64, ptr %i2, align 8, !tbaa !15
+  %i5 = getelementptr inbounds [2 x i32], ptr %i3, i64 0, i64 %i4
+  ret ptr %i5
+}
+
+attributes #0 = { mustprogress nounwind uwtable "frame-pointer"="none" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
+attributes #1 = { argmemonly nocallback nofree nosync nounwind willreturn }
+attributes #2 = { argmemonly nocallback nofree nounwind willreturn }
+attributes #3 = { nounwind }
+
+!llvm.module.flags = !{!0, !1, !2, !3}
+!llvm.ident = !{!4}
+
+!0 = !{i32 1, !"wchar_size", i32 4}
+!1 = !{i32 8, !"PIC Level", i32 2}
+!2 = !{i32 7, !"PIE Level", i32 2}
+!3 = !{i32 7, !"uwtable", i32 2}
+!4 = !{!"Debian clang version 16.0.0-++20221024100939+996267d20ea0-1~exp1~20221024221046.844"}
+!5 = !{!6, !6, i64 0}
+!6 = !{!"int", !7, i64 0}
+!7 = !{!"omnipotent char", !8, i64 0}
+!8 = !{!"Simple C++ TBAA"}
+!9 = !{!10, !10, i64 0}
+!10 = !{!"any pointer", !7, i64 0}
+!11 = distinct !{!11, !12}
+!12 = !{!"llvm.loop.mustprogress"}
+!13 = !{i64 0, i64 8, !14}
+!14 = !{!7, !7, i64 0}
+!15 = !{!16, !16, i64 0}
+!16 = !{!"long", !7, i64 0}