Revert "Temporarily Revert "Add basic loop fusion pass.""
The reversion apparently deleted the test/Transforms directory.
Will be re-reverting again.
llvm-svn: 358552
diff --git a/llvm/test/Transforms/RewriteStatepointsForGC/preprocess.ll b/llvm/test/Transforms/RewriteStatepointsForGC/preprocess.ll
new file mode 100644
index 0000000..105e0e8
--- /dev/null
+++ b/llvm/test/Transforms/RewriteStatepointsForGC/preprocess.ll
@@ -0,0 +1,63 @@
+; RUN: opt -rewrite-statepoints-for-gc -S < %s | FileCheck %s
+; RUN: opt -passes=rewrite-statepoints-for-gc -S < %s | FileCheck %s
+
+; Test to make sure we destroy LCSSA's single entry phi nodes before
+; running liveness
+
+declare void @consume(...) "gc-leaf-function"
+
+define void @test6(i64 addrspace(1)* %obj) gc "statepoint-example" {
+; CHECK-LABEL: @test6
+entry:
+ br label %next
+
+next: ; preds = %entry
+; CHECK-LABEL: next:
+; CHECK-NEXT: gc.statepoint
+; CHECK-NEXT: gc.relocate
+; CHECK-NEXT: bitcast
+; CHECK-NEXT: @consume(i64 addrspace(1)* %obj.relocated.casted)
+; CHECK-NEXT: @consume(i64 addrspace(1)* %obj.relocated.casted)
+; Need to delete unreachable gc.statepoint call
+ %obj2 = phi i64 addrspace(1)* [ %obj, %entry ]
+ call void @foo() [ "deopt"() ]
+ call void (...) @consume(i64 addrspace(1)* %obj2)
+ call void (...) @consume(i64 addrspace(1)* %obj)
+ ret void
+}
+
+define void @test7() gc "statepoint-example" {
+; CHECK-LABEL: test7
+; CHECK-NOT: gc.statepoint
+; Need to delete unreachable gc.statepoint invoke - tested seperately given
+; a correct implementation could only remove the instructions, not the block
+ ret void
+
+unreached: ; preds = %unreached
+ %obj = phi i64 addrspace(1)* [ null, %unreached ]
+ call void @foo() [ "deopt"() ]
+ call void (...) @consume(i64 addrspace(1)* %obj)
+ br label %unreached
+}
+
+define void @test8() gc "statepoint-example" personality i32 ()* undef {
+; CHECK-LABEL: test8
+; CHECK-NOT: gc.statepoint
+; Bound the last check-not
+ ret void
+
+unreached: ; No predecessors!
+ invoke void @foo() [ "deopt"() ]
+; CHECK-LABEL: @foo
+ to label %normal_return unwind label %exceptional_return
+
+normal_return: ; preds = %unreached
+ ret void
+
+exceptional_return: ; preds = %unreached
+ %landing_pad4 = landingpad { i8*, i32 }
+ cleanup
+ ret void
+}
+
+declare void @foo()