Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/llvm/test/CodeGen/AArch64/arm64-2012-05-07-MemcpyAlignBug.ll

@@ -0,0 +1,21 @@
+; RUN: llc < %s -mtriple=arm64-eabi -mcpu=cyclone | FileCheck %s
+; <rdar://problem/11294426>
+
+@b = private unnamed_addr constant [3 x i32] [i32 1768775988, i32 1685481784, i32 1836253201], align 4
+
+; The important thing for this test is that we need an unaligned load of `l_b'
+; ("ldr w2, [x1, #8]" in this case).
+
+; CHECK:      adrp x[[PAGE:[0-9]+]], {{l_b@PAGE|.Lb}}
+; CHECK: add  x[[ADDR:[0-9]+]], x[[PAGE]], {{l_b@PAGEOFF|:lo12:.Lb}}
+; CHECK-NEXT: ldr  [[VAL:w[0-9]+]], [x[[ADDR]], #8]
+; CHECK-NEXT: str  [[VAL]], [x0, #8]
+; CHECK-NEXT: ldr  [[VAL2:x[0-9]+]], [x[[ADDR]]]
+; CHECK-NEXT: str  [[VAL2]], [x0]
+
+define void @foo(i8* %a) {
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8* %a, i8* bitcast ([3 x i32]* @b to i8*), i64 12, i32 4, i1 false)
+  ret void
+}
+
+declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind