Revert r282168 "GVN-hoist: fix store past load dependence analysis (PR30216)"

and also the dependent r282175 "GVN-hoist: do not dereference null pointers"

It's causing compiler crashes building Harfbuzz (PR30499).

llvm-svn: 282199

1 files changed, 0 insertions, 52 deletions

diff --git a/llvm/test/Transforms/GVNHoist/pr30216.ll b/llvm/test/Transforms/GVNHoist/pr30216.ll
deleted file mode 100644
index b2ce338f8ae..00000000000
--- a/llvm/test/Transforms/GVNHoist/pr30216.ll
+++ /dev/null
@@ -1,52 +0,0 @@
-; RUN: opt -S -gvn-hoist < %s | FileCheck %s
-
-; Make sure the two stores @B do not get hoisted past the load @B.
-
-; CHECK-LABEL: define i8* @Foo
-; CHECK: store
-; CHECK: store
-; CHECK: load
-; CHECK: store
-
-@A = external global i8
-@B = external global i8*
-
-define i8* @Foo() {
-  store i8 0, i8* @A
-  br i1 undef, label %if.then, label %if.else
-
-if.then:
-  store i8* null, i8** @B
-  ret i8* null
-
-if.else:
-  %1 = load i8*, i8** @B
-  store i8* null, i8** @B
-  ret i8* %1
-}
-
-; Make sure the two stores @B do not get hoisted past the store @GlobalVar.
-
-; CHECK-LABEL: define i8* @Fun
-; CHECK: store
-; CHECK: store
-; CHECK: store
-; CHECK: store
-; CHECK: load
-
-@GlobalVar = internal global i8 0
-
-define i8* @Fun() {
-  store i8 0, i8* @A
-  br i1 undef, label %if.then, label %if.else
-
-if.then:
-  store i8* null, i8** @B
-  ret i8* null
-
-if.else:
-  store i8 0, i8* @GlobalVar
-  store i8* null, i8** @B
-  %1 = load i8*, i8** @B
-  ret i8* %1
-}
\ No newline at end of file