Merge tests into modref.ll. Also add a test for r84174 at Chris' behest!

llvm-svn: 84400

1 files changed, 41 insertions, 1 deletions

diff --git a/llvm/test/Analysis/BasicAA/modref.ll b/llvm/test/Analysis/BasicAA/modref.ll
index 54d415e060e..b3d93acf55e 100644
--- a/llvm/test/Analysis/BasicAA/modref.ll
+++ b/llvm/test/Analysis/BasicAA/modref.ll
@@ -1,6 +1,9 @@
-; RUN: opt < %s -basicaa -gvn -S | FileCheck %s
+; RUN: opt < %s -basicaa -gvn -dse -S | FileCheck %s
 
 declare void @llvm.memset.i32(i8*, i8, i32, i32)
+declare void @llvm.memset.i8(i8*, i8, i8, i32)
+declare void @llvm.memcpy.i8(i8*, i8*, i8, i32)
+declare void @llvm.lifetime.end(i64, i8* nocapture)
 
 declare void @external(i32*) 
 
@@ -19,3 +22,40 @@ define i32 @test0(i8* %P) {
 ; CHECK: ret i32 0
 }
 
+declare void @llvm.memcpy.i8(i8*, i8*, i8, i32)
+
+define i8 @test1() {
+; CHECK: @test1
+  %A = alloca i8
+  %B = alloca i8
+
+  store i8 2, i8* %B  ;; Not written to by memcpy
+
+  call void @llvm.memcpy.i8(i8* %A, i8* %B, i8 -1, i32 0)
+
+  %C = load i8* %B
+  ret i8 %C
+; CHECK: ret i8 2
+}
+
+define i8 @test2(i8* %P) {
+; CHECK: @test2
+  %P2 = getelementptr i8* %P, i32 1000
+  store i8 1, i8* %P2  ;; Not dead across memset
+  call void @llvm.memset.i8(i8* %P, i8 2, i8 127, i32 0)
+  %A = load i8* %P2
+  ret i8 %A
+; CHECK: ret i8 1
+}
+
+define void @test3(i8* %P) {
+; CHECK: @test3
+  %P2 = getelementptr i8* %P, i32 2
+  store i8 1, i8* %P2  ;; Not read by lifetime.end
+; CHECK: store
+  call void @llvm.lifetime.end(i64 1, i8* %P)
+  store i8 2, i8* %P2
+; CHECK-NOT: store
+  ret void
+; CHECK: ret void
+}
\ No newline at end of file