instcombine: Migrate math library call simplifications

[oota-llvm.git] / test / Transforms / DeadStoreElimination / lifetime.ll

diff --git a/test/Transforms/DeadStoreElimination/lifetime.ll b/test/Transforms/DeadStoreElimination/lifetime.ll
index b2da790db278c150052e2490ba48e1e60102a51b..678565315e3713b9c775c7e4b02da080afd7f6c0 100644 (file)
--- a/test/Transforms/DeadStoreElimination/lifetime.ll
+++ b/test/Transforms/DeadStoreElimination/lifetime.ll
@@ -1,7 +1,10 @@
-; RUN: opt -S -dse < %s | FileCheck %s
+; RUN: opt -S -basicaa -dse < %s | FileCheck %s
 
-declare void @llvm.lifetime.end(i64, i8*)
-declare void @llvm.memset.i8(i8*, i8, i8, i32)
+target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
+
+declare void @llvm.lifetime.start(i64, i8* nocapture) nounwind
+declare void @llvm.lifetime.end(i64, i8* nocapture) nounwind
+declare void @llvm.memset.p0i8.i8(i8* nocapture, i8, i8, i32, i1) nounwind
 
 define void @test1() {
 ; CHECK: @test1
@@ -11,9 +14,24 @@ define void @test1() {
   call void @llvm.lifetime.end(i64 1, i8* %A)
 ; CHECK: lifetime.end
 
-  call void @llvm.memset.i8(i8* %A, i8 0, i8 -1, i32 0)
+  call void @llvm.memset.p0i8.i8(i8* %A, i8 0, i8 -1, i32 0, i1 false)
 ; CHECK-NOT: memset
 
   ret void
 ; CHECK: ret void
 }
+
+define void @test2(i32* %P) {
+; CHECK: test2
+  %Q = getelementptr i32* %P, i32 1
+  %R = bitcast i32* %Q to i8*
+  call void @llvm.lifetime.start(i64 4, i8* %R)
+; CHECK: lifetime.start
+  store i32 0, i32* %Q  ;; This store is dead.
+; CHECK-NOT: store
+  call void @llvm.lifetime.end(i64 4, i8* %R)
+; CHECK: lifetime.end
+  ret void
+}
+
+