Merge commit '5b22a50e819c' from swift/release/6.1 into stable/20240723

Author: git apple-llvm automerger

llvm/test/CodeGen/X86/swifttailcc-store-ret-address-aliasing-stack-slot.ll

@@ -0,0 +1,44 @@
+; RUN: llc %s -o - | FileCheck %s
+
+target triple = "x86_64-apple-macosx"
+
+declare swifttailcc void @tc_fn(ptr swiftasync, i64, ptr, i8, ptr swiftself)
+
+declare void @foo()
+
+; FIXME: Currently the return address is written to the stack before loading the
+; argument from an aliasing stack slot.
+define swifttailcc void @test(ptr %0, ptr swiftasync %1, i64 %2, i64 %3, ptr %4, ptr %5, i64 %6, ptr %7, i8 %8) {
+; CHECK-LABEL: test:
+; CHECK:       ## %bb.0: ## %entry
+; CHECK-NEXT:    pushq %r15
+; CHECK-NEXT:    .cfi_def_cfa_offset 16
+; CHECK-NEXT:    pushq %rbx
+; CHECK-NEXT:    .cfi_def_cfa_offset 24
+; CHECK-NEXT:    pushq %rax
+; CHECK-NEXT:    .cfi_def_cfa_offset 32
+; CHECK-NEXT:    .cfi_offset %rbx, -24
+; CHECK-NEXT:    .cfi_offset %r15, -16
+; CHECK-NEXT:    movq %r9, %r13
+; CHECK-NEXT:    movq %r8, %rbx
+; CHECK-NEXT:    movq {{[0-9]+}}(%rsp), %r15
+; CHECK-NEXT:    callq _foo
+; CHECK-NEXT:    movq %r14, (%rax)
+; CHECK-NEXT:    movq {{[0-9]+}}(%rsp), %rcx
+; CHECK-NEXT:    movq %rcx, [[OFF:[0-9]+]](%rsp)
+; CHECK-NEXT:    movl [[OFF]](%rsp), %edx
+; CHECK-NEXT:    movq %rax, %r14
+; CHECK-NEXT:    movq %r13, %rdi
+; CHECK-NEXT:    movq %r15, %rsi
+; CHECK-NEXT:    movq %rbx, %r13
+; CHECK-NEXT:    addq $8, %rsp
+; CHECK-NEXT:    popq %rbx
+; CHECK-NEXT:    popq %r15
+; CHECK-NEXT:    addq $16, %rsp
+; CHECK-NEXT:    jmp _tc_fn ## TAILCALL
+entry:
+  %res = tail call ptr @foo()
+  store ptr %1, ptr %res, align 8
+  musttail call swifttailcc void @tc_fn(ptr swiftasync %res, i64 %6, ptr %7, i8 %8, ptr swiftself %5)
+  ret void
+}