isKnownNonNull needs to consider globals in non-zero address spaces.
Globals in address spaces other than one may have 0 as a valid address,
so we should not assume that they can be null.
Reviewed by Philip Reames.
llvm-svn: 246137
diff --git a/llvm/test/Transforms/InstCombine/nonnull-attribute.ll b/llvm/test/Transforms/InstCombine/nonnull-attribute.ll
new file mode 100644
index 0000000..74fb091
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/nonnull-attribute.ll
@@ -0,0 +1,19 @@
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+; This test makes sure that we do not assume globals in address spaces other
+; than 0 are able to be null.
+
+@as0 = external global i32
+@as1 = external addrspace(1) global i32
+
+declare void @addrspace0(i32*)
+declare void @addrspace1(i32 addrspace(1)*)
+
+; CHECK: call void @addrspace0(i32* nonnull @as0)
+; CHECK: call void @addrspace1(i32 addrspace(1)* @as1)
+
+define void @test() {
+ call void @addrspace0(i32* @as0)
+ call void @addrspace1(i32 addrspace(1)* @as1)
+ ret void
+}