Revert r300657 due to crashes in stage2 of bootstraps:

http://lab.llvm.org:8011/builders/clang-with-lto-ubuntu/builds/2476/steps/build-stage2-LLVMgold.so/logs/stdio
http://bb.pgr.jp/builders/clang-3stage-x86_64-linux/builds/15036/steps/build_llvmclang/logs/stdio

I've updated the commit thread, reverting to get the bots back to green.

Original commit summary:
[JumpThread] We want to fold (not thread) when all predecessor go to single BB's successor.

llvm-svn: 300662

1 files changed, 0 insertions, 89 deletions

diff --git a/llvm/test/Transforms/JumpThreading/basic.ll b/llvm/test/Transforms/JumpThreading/basic.ll
index 2fd8c42adc9..14cd1fbe1c8 100644
--- a/llvm/test/Transforms/JumpThreading/basic.ll
+++ b/llvm/test/Transforms/JumpThreading/basic.ll
@@ -4,95 +4,6 @@ declare i32 @f1()
 declare i32 @f2()
 declare void @f3()
 
-; Make sure we can fold this branch ... We will not be able to thread it as
-; L0 is too big to duplicate. L2 is the unreachable block here.
-;
-; CHECK-LABEL: @test_br_folding_not_threading(
-; CHECK: L1:
-; CHECK: call i32 @f2()
-; CHECK: call void @f3()
-; CHECK-NEXT: ret void
-; CHECK-NOT: br
-; CHECK: L3:
-define void @test_br_folding_not_threading(i1 %cond) nounwind {
-entry:
-  br i1 %cond, label %L0, label %L3 
-L0:
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  br i1 %cond, label %L1, label %L2 
-
-L1:
-  call void @f3()
-  ret void
-L2:
-  call void @f3()
-  ret void
-L3:
-  call void @f3()
-  ret void
-}
-
-
-; Make sure we can fold this branch ... We will not be able to thread it as
-; L0 is too big to duplicate. L2 is the unreachable block here.
-; With more than 1 predecessors.
-;
-; CHECK-LABEL: @test_br_folding_not_threading_multiple_preds(
-; CHECK: L1:
-; CHECK: call i32 @f2()
-; CHECK: call void @f3()
-; CHECK-NEXT: ret void
-; CHECK-NOT: br
-; CHECK: L3:
-define void @test_br_folding_not_threading_multiple_preds(i1 %condx, i1 %cond) nounwind {
-entry:
-  br i1 %condx, label %X0, label %X1
-
-X0:
-  br i1 %cond, label %L0, label %L3 
-
-X1:
-  br i1 %cond, label %L0, label %L3 
-
-L0:
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  call i32 @f2()
-  br i1 %cond, label %L1, label %L2 
-
-L1:
-  call void @f3()
-  ret void
-L2:
-  call void @f3()
-  ret void
-L3:
-  call void @f3()
-  ret void
-}
-
 define i32 @test1(i1 %cond) {
 ; CHECK-LABEL: @test1(