[AMDGPU] Fix for vectorizer crash with pointers of different size

When vectorizer strips pointers it can eventually end up with
pointers of two different sizes, then SCEV will crash.

Differential Revision: https://reviews.llvm.org/D65480

llvm-svn: 367443

1 files changed, 18 insertions, 0 deletions

diff --git a/llvm/test/Transforms/LoadStoreVectorizer/AMDGPU/vect-ptr-ptr-size-mismatch.ll b/llvm/test/Transforms/LoadStoreVectorizer/AMDGPU/vect-ptr-ptr-size-mismatch.ll
new file mode 100644
index 00000000000..197a439102f
--- /dev/null
+++ b/llvm/test/Transforms/LoadStoreVectorizer/AMDGPU/vect-ptr-ptr-size-mismatch.ll
@@ -0,0 +1,18 @@
+; RUN: opt -mtriple=amdgcn-amd-amdhsa -load-store-vectorizer -S < %s | FileCheck %s
+
+target datalayout = "e-p:64:64-p1:64:64-p2:32:32-p3:32:32-p4:64:64-p5:32:32"
+
+; CHECK-LABEL: @test
+; CHECK: store i32* undef, i32** %tmp9, align 8
+; CHECK: store i32* undef, i32** %tmp7, align 8
+define amdgpu_kernel void @test() {
+entry:
+  %a10.ascast.i = addrspacecast i32* addrspace(5)* null to i32**
+  %tmp4 = icmp eq i32 undef, 0
+  %tmp6 = select i1 false, i32** undef, i32** undef
+  %tmp7 = select i1 %tmp4, i32** null, i32** %tmp6
+  %tmp9 = select i1 %tmp4, i32** %a10.ascast.i, i32** null
+  store i32* undef, i32** %tmp9, align 8
+  store i32* undef, i32** %tmp7, align 8
+  unreachable
+}