[SLP] Precommit test for #98978 (NFC)

Author: nikic

llvm/test/Transforms/SLPVectorizer/X86/pr98978.ll

@@ -0,0 +1,99 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
+; RUN: opt -S -passes=slp-vectorizer < %s | FileCheck %s
+
+target triple = "x86_64-redhat-linux-gnu"
+
+define void @test(ptr %p1, i64 %arg1, i64 %arg2) {
+; CHECK-LABEL: define void @test(
+; CHECK-SAME: ptr [[P1:%.*]], i64 [[ARG1:%.*]], i64 [[ARG2:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*]]:
+; CHECK-NEXT:    br label %[[LOOP1:.*]]
+; CHECK:       [[LOOP1]]:
+; CHECK-NEXT:    [[I:%.*]] = phi ptr [ [[I21:%.*]], %[[BB20:.*]] ], [ [[P1]], %[[ENTRY]] ]
+; CHECK-NEXT:    br i1 false, label %[[BB22:.*]], label %[[DOTPREHEADER48_PREHEADER_1:.*]]
+; CHECK:       [[DEAD:.*]]:
+; CHECK-NEXT:    br label %[[DOTPREHEADER48_PREHEADER_1]]
+; CHECK:       [[_PREHEADER48_PREHEADER_1:.*:]]
+; CHECK-NEXT:    [[I5:%.*]] = phi ptr [ [[I]], %[[DEAD]] ], [ [[I]], %[[LOOP1]] ]
+; CHECK-NEXT:    br label %[[DOTLOOPEXIT49_1:.*]]
+; CHECK:       [[DEAD1:.*]]:
+; CHECK-NEXT:    br i1 false, label %[[DOTLOOPEXIT49_1]], label %[[BB20]]
+; CHECK:       [[_LOOPEXIT49_1:.*:]]
+; CHECK-NEXT:    [[I6:%.*]] = phi ptr [ [[I5]], %[[DEAD1]] ], [ [[I5]], %[[DOTPREHEADER48_PREHEADER_1]] ]
+; CHECK-NEXT:    [[I7:%.*]] = getelementptr i8, ptr [[I6]], i64 [[ARG1]]
+; CHECK-NEXT:    br label %[[BB10:.*]]
+; CHECK:       [[DEAD2:.*]]:
+; CHECK-NEXT:    br label %[[BB10]]
+; CHECK:       [[BB10]]:
+; CHECK-NEXT:    [[I11:%.*]] = phi ptr [ [[I7]], %[[DOTLOOPEXIT49_1]] ], [ null, %[[DEAD2]] ]
+; CHECK-NEXT:    [[TMP0:%.*]] = load <2 x i64>, ptr [[I11]], align 1
+; CHECK-NEXT:    [[TMP1:%.*]] = shufflevector <2 x i64> [[TMP0]], <2 x i64> poison, <2 x i32> <i32 1, i32 0>
+; CHECK-NEXT:    store <2 x i64> [[TMP1]], ptr [[I6]], align 1
+; CHECK-NEXT:    br label %[[BB20]]
+; CHECK:       [[BB20]]:
+; CHECK-NEXT:    [[I21]] = phi ptr [ [[I5]], %[[DEAD1]] ], [ [[I6]], %[[BB10]] ]
+; CHECK-NEXT:    br label %[[LOOP1]]
+; CHECK:       [[BB22]]:
+; CHECK-NEXT:    [[I23:%.*]] = getelementptr i8, ptr [[I]], i64 [[ARG2]]
+; CHECK-NEXT:    [[I25:%.*]] = getelementptr i8, ptr [[I23]], i64 8
+; CHECK-NEXT:    br label %[[BB26:.*]]
+; CHECK:       [[BB26]]:
+; CHECK-NEXT:    [[I27:%.*]] = phi ptr [ null, %[[BB26]] ], [ [[I25]], %[[BB22]] ]
+; CHECK-NEXT:    store i64 0, ptr [[I27]], align 1
+; CHECK-NEXT:    [[I28:%.*]] = getelementptr i8, ptr [[I27]], i64 8
+; CHECK-NEXT:    [[I29:%.*]] = load i64, ptr [[I23]], align 1
+; CHECK-NEXT:    store i64 0, ptr [[I28]], align 1
+; CHECK-NEXT:    br label %[[BB26]]
+;
+entry:
+  br label %loop1
+
+loop1:                                            ; preds = %bb20, %entry
+  %i = phi ptr [ %i21, %bb20 ], [ %p1, %entry ]
+  br i1 false, label %bb22, label %.preheader48.preheader.1
+
+dead:                                             ; No predecessors!
+  br label %.preheader48.preheader.1
+
+.preheader48.preheader.1:                         ; preds = %dead, %loop1
+  %i5 = phi ptr [ %i, %dead ], [ %i, %loop1 ]
+  br label %.loopexit49.1
+
+dead1:                                    ; No predecessors!
+  br i1 false, label %.loopexit49.1, label %bb20
+
+.loopexit49.1:                                    ; preds = %dead1, %.preheader48.preheader.1
+  %i6 = phi ptr [ %i5, %dead1 ], [ %i5, %.preheader48.preheader.1 ]
+  %i7 = getelementptr i8, ptr %i6, i64 %arg1
+  br label %bb10
+
+dead2:                                            ; No predecessors!
+  br label %bb10
+
+bb10:                                             ; preds = %dead2, %.loopexit49.1
+  %i11 = phi ptr [ %i7, %.loopexit49.1 ], [ null, %dead2 ]
+  %i16 = getelementptr i8, ptr %i11, i64 8
+  %i17 = load i64, ptr %i16, align 1
+  store i64 %i17, ptr %i6, align 1
+  %i18 = getelementptr i8, ptr %i6, i64 8
+  %i19 = load i64, ptr %i11, align 1
+  store i64 %i19, ptr %i18, align 1
+  br label %bb20
+
+bb20:                                             ; preds = %bb10, %dead1
+  %i21 = phi ptr [ %i5, %dead1 ], [ %i6, %bb10 ]
+  br label %loop1
+
+bb22:                                             ; preds = %loop1
+  %i23 = getelementptr i8, ptr %i, i64 %arg2
+  %i25 = getelementptr i8, ptr %i23, i64 8
+  br label %bb26
+
+bb26:                                             ; preds = %bb26, %bb22
+  %i27 = phi ptr [ null, %bb26 ], [ %i25, %bb22 ]
+  store i64 0, ptr %i27, align 1
+  %i28 = getelementptr i8, ptr %i27, i64 8
+  %i29 = load i64, ptr %i23, align 1
+  store i64 0, ptr %i28, align 1
+  br label %bb26
+}