Add a regression test for PR28348.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@274142 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/Thumb/and_neg.ll b/test/CodeGen/Thumb/and_neg.ll
new file mode 100644 (file)
index 0000000..88217c7
--- /dev/null
+++ b/test/CodeGen/Thumb/and_neg.ll
@@ -0,0 +1,20 @@
+; RUN: llc < %s -mtriple=thumbv7-linux-gnueabi -verify-machineinstrs
+; Just shouldn't crash, PR28348
+
+%C = type { i8* }
+
+define void @repro(%C* %this, i32 %a) {
+  %a_align1 = and i32 %a, -4096
+  %a_and = and i32 %a, 4095
+  %a_align2 = or i32 %a_and, 4096
+
+  call void @use(i32 %a_align1)
+
+  %C_field = getelementptr inbounds %C, %C* %this, i32 0, i32 0
+  %addptr = getelementptr inbounds i8, i8* null, i32 %a_align2
+  store i8* %addptr, i8** %C_field, align 4
+
+  ret void
+}
+
+declare void @use(i32)