[llvm] r290790 - [ValueTracking] add tests for known-nonnull-at; NFC

[Sanjay Patel via llvm-commits]

Author: spatel
Date: Sat Dec 31 13:23:26 2016
New Revision: 290790

URL: http://llvm.org/viewvc/llvm-project?rev=290790&view=rev
Log:
[ValueTracking] add tests for known-nonnull-at; NFC

Added:
    llvm/trunk/test/Analysis/ValueTracking/known-nonnull-at.ll

Added: llvm/trunk/test/Analysis/ValueTracking/known-nonnull-at.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Analysis/ValueTracking/known-nonnull-at.ll?rev=290790&view=auto
==============================================================================
--- llvm/trunk/test/Analysis/ValueTracking/known-nonnull-at.ll (added)
+++ llvm/trunk/test/Analysis/ValueTracking/known-nonnull-at.ll Sat Dec 31 13:23:26 2016
@@ -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
+}
+