[ValueTracking] add tests for known-nonnull-at; NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@290790 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Analysis/ValueTracking/known-nonnull-at.ll b/test/Analysis/ValueTracking/known-nonnull-at.ll
new file mode 100644 (file)
index 0000000..8a0d1f3
--- /dev/null
+++ b/test/Analysis/ValueTracking/known-nonnull-at.ll
@@ -0,0 +1,57 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -S -instsimplify < %s | FileCheck %s
+
+declare void @bar(i8* %a, i8* nonnull %b)
+
+; 'y' must be nonnull.
+
+define i1 @caller1(i8* %x, i8* %y) {
+; CHECK-LABEL: @caller1(
+; CHECK-NEXT:    call void @bar(i8* %x, i8* %y)
+; CHECK-NEXT:    [[NULL_CHECK:%.*]] = icmp eq i8* %y, null
+; CHECK-NEXT:    ret i1 [[NULL_CHECK]]
+;
+  call void @bar(i8* %x, i8* %y)
+  %null_check = icmp eq i8* %y, null
+  ret i1 %null_check
+}
+
+; Don't know anything about 'y'.
+
+define i1 @caller2(i8* %x, i8* %y) {
+; CHECK-LABEL: @caller2(
+; CHECK-NEXT:    call void @bar(i8* %y, i8* %x)
+; CHECK-NEXT:    [[NULL_CHECK:%.*]] = icmp eq i8* %y, null
+; CHECK-NEXT:    ret i1 [[NULL_CHECK]]
+;
+  call void @bar(i8* %y, i8* %x)
+  %null_check = icmp eq i8* %y, null
+  ret i1 %null_check
+}
+
+; 'y' must be nonnull.
+
+define i1 @caller3(i8* %x, i8* %y) {
+; CHECK-LABEL: @caller3(
+; CHECK-NEXT:    call void @bar(i8* %x, i8* %y)
+; CHECK-NEXT:    [[NULL_CHECK:%.*]] = icmp ne i8* %y, null
+; CHECK-NEXT:    ret i1 [[NULL_CHECK]]
+;
+  call void @bar(i8* %x, i8* %y)
+  %null_check = icmp ne i8* %y, null
+  ret i1 %null_check
+}
+
+; Don't know anything about 'y'.
+
+define i1 @caller4(i8* %x, i8* %y) {
+; CHECK-LABEL: @caller4(
+; CHECK-NEXT:    call void @bar(i8* %y, i8* %x)
+; CHECK-NEXT:    [[NULL_CHECK:%.*]] = icmp ne i8* %y, null
+; CHECK-NEXT:    ret i1 [[NULL_CHECK]]
+;
+  call void @bar(i8* %y, i8* %x)
+  %null_check = icmp ne i8* %y, null
+  ret i1 %null_check
+}
+