[LoopVectorize] Added address space check when analysing interleaved accesses

Prevent memory objects of different address spaces to be part of
the same load/store groups when analysing interleaved accesses.

This is fixing pr31900.

Reviewers: HaoLiu, mssimpso, mkuper

Reviewed By: mssimpso, mkuper

Subscribers: llvm-commits, efriedma, mzolotukhin

Differential Revision: https://reviews.llvm.org/D29717

This reverts r295042 (re-applies r295038) with an additional fix for the
buildbot problem.

llvm-svn: 295858

1 files changed, 37 insertions, 0 deletions

diff --git a/llvm/test/Transforms/LoopVectorize/AArch64/pr31900.ll b/llvm/test/Transforms/LoopVectorize/AArch64/pr31900.ll
new file mode 100644
index 00000000000..5ea38a4a246
--- /dev/null
+++ b/llvm/test/Transforms/LoopVectorize/AArch64/pr31900.ll
@@ -0,0 +1,37 @@
+; RUN: opt -S -mtriple=aarch64-apple-ios -loop-vectorize -enable-interleaved-mem-accesses -force-vector-width=2 < %s | FileCheck %s
+
+; Reproducer for address space fault in the LoopVectorizer (pr31900). Added
+; different sized address space pointers (p:16:16-p4:32:16) to the aarch64
+; datalayout to reproduce the fault.
+
+target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128-p:16:16-p4:32:16"
+
+; Check that all the loads are scalarized
+; CHECK: load i16, i16*
+; CHECK: load i16, i16*
+; CHECK: load i16, i16 addrspace(4)*
+; CHECK: load i16, i16 addrspace(4)*
+
+%rec1445 = type { i16, i16, i16, i16, i16 }
+
+define void @foo() {
+bb1:
+  br label %bb4
+
+bb4:
+  %tmp1 = phi i16 [ undef, %bb1 ], [ %_tmp1013, %bb4 ]
+  %tmp2 = phi %rec1445* [ undef, %bb1 ], [ %_tmp1015, %bb4 ]
+  %tmp3 = phi %rec1445 addrspace(4)* [ undef, %bb1 ], [ %_tmp1017, %bb4 ]
+  %0 = getelementptr %rec1445, %rec1445* %tmp2, i16 0, i32 1
+  %_tmp987 = load i16, i16* %0, align 1
+  %1 = getelementptr %rec1445, %rec1445 addrspace(4)* %tmp3, i32 0, i32 1
+  %_tmp993 = load i16, i16 addrspace(4)* %1, align 1
+  %_tmp1013 = add i16 %tmp1, 1
+  %_tmp1015 = getelementptr %rec1445, %rec1445* %tmp2, i16 1
+  %_tmp1017 = getelementptr %rec1445, %rec1445 addrspace(4)* %tmp3, i32 1
+  %_tmp1019 = icmp ult i16 %_tmp1013, 24
+  br i1 %_tmp1019, label %bb4, label %bb16
+
+bb16:
+  unreachable
+}