1 files changed, 178 insertions, 0 deletions
diff --git a/llvm/test/Transforms/NewGVN/metadata-nonnull.ll b/llvm/test/Transforms/NewGVN/metadata-nonnull.ll
new file mode 100644
index 00000000000..a09e86800ab
--- /dev/null
+++ b/llvm/test/Transforms/NewGVN/metadata-nonnull.ll
@@ -0,0 +1,178 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+
+; RUN: opt %s -newgvn -S | FileCheck %s
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+define i8* @test1(i8** %v0, i8** %v1) {
+; CHECK-LABEL: @test1(
+; CHECK-NEXT:  top:
+; CHECK-NEXT:    [[V2:%.*]] = load i8*, i8** [[V0:%[a-z0-9]+]], !nonnull !0
+; CHECK-NEXT:    store i8* [[V2]], i8** [[V1:%.*]]
+; CHECK-NEXT:    ret i8* [[V2]]
+;
+top:
+  %v2 = load i8*, i8** %v0, !nonnull !0
+  store i8* %v2, i8** %v1
+  %v3 = load i8*, i8** %v1
+  ret i8* %v3
+}
+
+; FIXME: could propagate nonnull to first load?
+define i8* @test2(i8** %v0, i8** %v1) {
+; CHECK-LABEL: @test2(
+; CHECK-NEXT:  top:
+; CHECK-NEXT:    [[V2:%.*]] = load i8*, i8** [[V0:%[a-z0-9]+]]
+; CHECK-NOT:     !nonnull
+; CHECK-NEXT:    store i8* [[V2]], i8** [[V1:%.*]]
+; CHECK-NEXT:    ret i8* [[V2]]
+;
+top:
+  %v2 = load i8*, i8** %v0
+  store i8* %v2, i8** %v1
+  %v3 = load i8*, i8** %v1, !nonnull !0
+  ret i8* %v3
+}
+
+declare void @use1(i8* %a) readonly
+
+define i8* @test3(i8** %v0) {
+; CHECK-LABEL: @test3(
+; CHECK-NEXT:  top:
+; CHECK-NEXT:    [[V1:%.*]] = load i8*, i8** [[V0:%[a-z0-9]+]]
+; CHECK-NOT:     !nonnull
+; CHECK-NEXT:    call void @use1(i8* [[V1]])
+; CHECK-NEXT:    br i1 undef, label [[BB1:%.*]], label [[BB2:%.*]]
+; CHECK:       bb1:
+; CHECK-NEXT:    ret i8* [[V1]]
+; CHECK:       bb2:
+; CHECK-NEXT:    ret i8* [[V1]]
+;
+top:
+  %v1 = load i8*, i8** %v0
+  call void @use1(i8* %v1)
+  br i1 undef, label %bb1, label %bb2
+
+bb1:
+  %v2 = load i8*, i8** %v0, !nonnull !0
+  ret i8* %v2
+
+bb2:
+  %v3 = load i8*, i8** %v0
+  ret i8* %v3
+}
+
+define i8* @test4(i8** %v0) {
+; CHECK-LABEL: @test4(
+; CHECK-NEXT:  top:
+; CHECK-NEXT:    [[V1:%.*]] = load i8*, i8** [[V0:%[a-z0-9]+]]
+; CHECK-NOT:     !nonnull
+; CHECK-NEXT:    call void @use1(i8* [[V1]])
+; CHECK-NEXT:    br i1 undef, label [[BB1:%.*]], label [[BB2:%.*]]
+; CHECK:       bb1:
+; CHECK-NEXT:    ret i8* [[V1]]
+; CHECK:       bb2:
+; CHECK-NEXT:    ret i8* [[V1]]
+;
+top:
+  %v1 = load i8*, i8** %v0
+  call void @use1(i8* %v1)
+  br i1 undef, label %bb1, label %bb2
+
+bb1:
+  %v2 = load i8*, i8** %v0
+  ret i8* %v2
+
+bb2:
+  %v3 = load i8*, i8** %v0, !nonnull !0
+  ret i8* %v3
+}
+
+define i8* @test5(i8** %v0) {
+; CHECK-LABEL: @test5(
+; CHECK-NEXT:  top:
+; CHECK-NEXT:    [[V1:%.*]] = load i8*, i8** [[V0:%[a-z0-9]+]], !nonnull !0
+; CHECK-NEXT:    call void @use1(i8* [[V1]])
+; CHECK-NEXT:    br i1 undef, label [[BB1:%.*]], label [[BB2:%.*]]
+; CHECK:       bb1:
+; CHECK-NEXT:    ret i8* [[V1]]
+; CHECK:       bb2:
+; CHECK-NEXT:    ret i8* [[V1]]
+;
+top:
+  %v1 = load i8*, i8** %v0, !nonnull !0
+  call void @use1(i8* %v1)
+  br i1 undef, label %bb1, label %bb2
+
+bb1:
+  %v2 = load i8*, i8** %v0
+  ret i8* %v2
+
+bb2:
+  %v3 = load i8*, i8** %v0
+  ret i8* %v3
+}
+
+define i8* @test6(i8** %v0, i8** %v1) {
+; CHECK-LABEL: @test6(
+; CHECK-NEXT:  top:
+; CHECK-NEXT:    br i1 undef, label [[BB1:%.*]], label [[BB2:%.*]]
+; CHECK:       bb1:
+; CHECK-NEXT:    [[V2:%.*]] = load i8*, i8** [[V0:%[a-z0-9]+]], !nonnull !0
+; CHECK-NEXT:    store i8* [[V2]], i8** [[V1:%.*]]
+; CHECK-NEXT:    ret i8* [[V2]]
+; CHECK:       bb2:
+; CHECK-NEXT:    [[V4:%.*]] = load i8*, i8** [[V0]]
+; CHECK-NOT:     !nonnull
+; CHECK-NEXT:    store i8* [[V4]], i8** [[V1]]
+; CHECK-NOT:     !nonnull
+; CHECK-NEXT:    ret i8* [[V4]]
+;
+top:
+  br i1 undef, label %bb1, label %bb2
+
+bb1:
+  %v2 = load i8*, i8** %v0, !nonnull !0
+  store i8* %v2, i8** %v1
+  %v3 = load i8*, i8** %v1
+  ret i8* %v3
+
+bb2:
+  %v4 = load i8*, i8** %v0
+  store i8* %v4, i8** %v1
+  %v5 = load i8*, i8** %v1, !nonnull !0
+  ret i8* %v5
+}
+
+declare void @use2(i8* %a)
+
+define i8* @test7(i8** %v0) {
+; CHECK-LABEL: @test7(
+; CHECK-NEXT:  top:
+; CHECK-NEXT:    [[V1:%.*]] = load i8*, i8** [[V0:%[a-z0-9]+]], !nonnull !0
+; CHECK-NEXT:    call void @use2(i8* [[V1]])
+; CHECK-NEXT:    br i1 undef, label [[BB1:%.*]], label [[BB2:%.*]]
+; CHECK:       bb1:
+; CHECK-NEXT:    [[V2:%.*]] = load i8*, i8** [[V0]]
+; CHECK-NOT:     !nonnull
+; CHECK-NEXT:    ret i8* [[V2]]
+; CHECK:       bb2:
+; CHECK-NEXT:    [[V3:%.*]] = load i8*, i8** [[V0]]
+; CHECK-NOT:     !nonnull
+; CHECK-NEXT:    ret i8* [[V3]]
+;
+top:
+  %v1 = load i8*, i8** %v0, !nonnull !0
+  call void @use2(i8* %v1)
+  br i1 undef, label %bb1, label %bb2
+
+bb1:
+  %v2 = load i8*, i8** %v0
+  ret i8* %v2
+
+bb2:
+  %v3 = load i8*, i8** %v0
+  ret i8* %v3
+}
+
+!0 = !{}