[LV] Add additional tests for pointer select support.

Additional test cases for D114487.

diff --git a/llvm/test/Transforms/LoopVectorize/pointer-select-runtime-checks.ll b/llvm/test/Transforms/LoopVectorize/pointer-select-runtime-checks.ll
new file mode 100644 (file)
index 0000000..4be87da
--- /dev/null
+++ b/llvm/test/Transforms/LoopVectorize/pointer-select-runtime-checks.ll
@@ -0,0 +1,137 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -passes=loop-vectorize -force-vector-width=1 -force-vector-interleave=2 -S %s | FileCheck %s
+
+define void @test1_select_invariant(ptr %src.1, ptr %src.2, ptr %dst, i1 %c, i8 %n) {
+; CHECK-LABEL: @test1_select_invariant(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[PTR_SEL:%.*]] = select i1 [[C:%.*]], ptr [[SRC_1:%.*]], ptr [[SRC_2:%.*]]
+; CHECK-NEXT:    [[TMP0:%.*]] = add i8 [[N:%.*]], -1
+; CHECK-NEXT:    [[TMP1:%.*]] = zext i8 [[TMP0]] to i32
+; CHECK-NEXT:    [[TMP2:%.*]] = add nuw nsw i32 [[TMP1]], 1
+; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[TMP2]], 2
+; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %scalar.ph, label %vector.memcheck
+; CHECK:       vector.memcheck:
+; CHECK-NEXT:    [[TMP3:%.*]] = add i8 [[N]], -1
+; CHECK-NEXT:    [[TMP4:%.*]] = zext i8 [[TMP3]] to i64
+; CHECK-NEXT:    [[TMP5:%.*]] = add nuw nsw i64 [[TMP4]], 1
+; CHECK-NEXT:    [[UGLYGEP:%.*]] = getelementptr i8, ptr [[DST:%.*]], i64 [[TMP5]]
+; CHECK-NEXT:    [[UGLYGEP1:%.*]] = getelementptr i8, ptr [[PTR_SEL]], i64 1
+; CHECK-NEXT:    [[BOUND0:%.*]] = icmp ult ptr [[DST]], [[UGLYGEP1]]
+; CHECK-NEXT:    [[BOUND1:%.*]] = icmp ult ptr [[PTR_SEL]], [[UGLYGEP]]
+; CHECK-NEXT:    [[FOUND_CONFLICT:%.*]] = and i1 [[BOUND0]], [[BOUND1]]
+; CHECK-NEXT:    br i1 [[FOUND_CONFLICT]], label %scalar.ph, label %vector.ph
+;
+entry:
+  %ptr.sel = select i1 %c, ptr %src.1, ptr %src.2
+  br label %loop
+
+loop:
+  %iv = phi i8 [ 0, %entry ], [ %iv.next, %loop ]
+  %l.1 = load i8, ptr %ptr.sel, align 8
+  %gep.dst = getelementptr i8, ptr %dst, i8 %iv
+  store i8 %l.1, ptr %gep.dst, align 2
+  %iv.next = add nsw nuw i8 %iv, 1
+  %ec = icmp eq i8 %iv.next, %n
+  br i1 %ec, label %exit, label %loop
+
+exit:
+  ret void
+}
+
+define void @test_loop_dependent_select1(ptr %src.1, ptr %src.2, ptr %dst, i1 %c, i8 %n) {
+; CHECK-LABEL: @test_loop_dependent_select1(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br label %loop
+; CHECK-NOT: vector.body:
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i8 [ 0, %entry ], [ %iv.next, %loop ]
+  %gep.src.1 = getelementptr i8, ptr %src.1, i8 %iv
+  %gep.src.2 = getelementptr i8, ptr %src.2, i8 %iv
+  %ptr.sel = select i1 %c, ptr %gep.src.1, ptr %gep.src.2
+  %l.1 = load i8, ptr %ptr.sel, align 8
+  %gep.dst = getelementptr i8, ptr %dst, i8 %iv
+  store i8 %l.1, ptr %gep.dst, align 2
+  %iv.next = add nsw nuw i8 %iv, 1
+  %ec = icmp eq i8 %iv.next, %n
+  br i1 %ec, label %exit, label %loop
+
+exit:
+  ret void
+}
+
+
+define void @test_loop_dependent_select2(ptr %src.1, ptr %src.2, ptr %dst, i8 %n, i8 %x) {
+; CHECK-LABEL: @test_loop_dependent_select2(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br label %loop
+; CHECK-NOT: vector.body:
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i8 [ 0, %entry ], [ %iv.next, %loop ]
+  %c = icmp ult i8 %iv, %x
+  %ptr.sel = select i1 %c, ptr %src.1, ptr %src.2
+  %l.1 = load i8, ptr %ptr.sel, align 8
+  %gep.dst = getelementptr i8, ptr %dst, i8 %iv
+  store i8 %l.1, ptr %gep.dst, align 2
+  %iv.next = add nsw nuw i8 %iv, 1
+  %ec = icmp eq i8 %iv.next, %n
+  br i1 %ec, label %exit, label %loop
+
+exit:
+  ret void
+}
+
+define void @test_loop_dependent_select_first_ptr_noundef(ptr noundef %src.1, ptr %src.2, ptr %dst, i8 %n, i8 %x) {
+; CHECK-LABEL: @test_loop_dependent_select_first_ptr_noundef(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br label %loop
+; CHECK-NOT: vector.body:
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i8 [ 0, %entry ], [ %iv.next, %loop ]
+  %c = icmp ult i8 %iv, %x
+  %ptr.sel = select i1 %c, ptr %src.1, ptr %src.2
+  %l.1 = load i8, ptr %ptr.sel, align 8
+  %gep.dst = getelementptr i8, ptr %dst, i8 %iv
+  store i8 %l.1, ptr %gep.dst, align 2
+  %iv.next = add nsw nuw i8 %iv, 1
+  %ec = icmp eq i8 %iv.next, %n
+  br i1 %ec, label %exit, label %loop
+
+exit:
+  ret void
+}
+
+define void @test_loop_dependent_select_second_ptr_noundef(ptr %src.1, ptr noundef %src.2, ptr %dst, i8 %n, i8 %x) {
+; CHECK-LABEL: @test_loop_dependent_select_second_ptr_noundef(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br label %loop
+; CHECK-NOT: vector.body:
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i8 [ 0, %entry ], [ %iv.next, %loop ]
+  %c = icmp ult i8 %iv, %x
+  %ptr.sel = select i1 %c, ptr %src.1, ptr %src.2
+  %l.1 = load i8, ptr %ptr.sel, align 8
+  %gep.dst = getelementptr i8, ptr %dst, i8 %iv
+  store i8 %l.1, ptr %gep.dst, align 2
+  %iv.next = add nsw nuw i8 %iv, 1
+  %ec = icmp eq i8 %iv.next, %n
+  br i1 %ec, label %exit, label %loop
+
+exit:
+  ret void
+}