Imported Upstream version 5.18.0.246

Former-commit-id: 0c7ce5b1a7851e13f22acfd379b7f9fb304e4833

external/llvm/test/MC/AArch64/dot-req.s

@@ -0,0 +1,49 @@
+// RUN: llvm-mc -triple=aarch64-none-linux-gnu -show-encoding < %s 2>&1 | FileCheck %s
+
+bar:
+        fred .req x5
+// CHECK-NOT: ignoring redefinition of register alias 'fred'
+        fred .req x5
+        mov fred, x11
+        .unreq fred
+        fred .req w6
+        mov w1, fred
+
+        bob .req fred
+        ada .req w1
+        mov ada, bob
+        .unreq bob
+        .unreq fred
+        .unreq ada
+// CHECK: mov      x5, x11                // encoding: [0xe5,0x03,0x0b,0xaa]
+// CHECK: mov      w1, w6                 // encoding: [0xe1,0x03,0x06,0x2a]
+// CHECK: mov      w1, w6                 // encoding: [0xe1,0x03,0x06,0x2a]
+
+        bob     .req b6
+        hanah   .req h5
+        sam     .req s4
+        dora    .req d3
+        quentin .req q2
+        vesna   .req v1
+        addv bob,     v0.8b
+        mov  hanah,   v4.h[3]
+        fadd s0,      sam,     sam
+        fmov d2,      dora
+        ldr  quentin, [sp]
+        mov  v0.8b,   vesna.8b
+// CHECK: addv    b6, v0.8b               // encoding: [0x06,0xb8,0x31,0x0e]
+// CHECK: mov     h5, v4.h[3]             // encoding: [0x85,0x04,0x0e,0x5e]
+// CHECK: fadd    s0, s4, s4              // encoding: [0x80,0x28,0x24,0x1e]
+// CHECK: fmov    d2, d3                  // encoding: [0x62,0x40,0x60,0x1e]
+// CHECK: ldr      q2, [sp]               // encoding: [0xe2,0x03,0xc0,0x3d]
+// CHECK: mov             v0.8b, v1.8b    // encoding: [0x20,0x1c,0xa1,0x0e]
+
+	peter .req x6
+	add peter, x0, x0
+	.unreq peter
+// CHECK: add x6, x0, x0
+
+	zoe .req x6
+	add zoe, x0, x0
+	.unreq zoe
+// CHECK: add x6, x0, x0