| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc -max-registers-for-gc-values=256 -use-registers-for-deopt-values=true -code-model=large -fixup-allow-gcptr-in-csr=true < %s | FileCheck %s |
| |
| ; The test checks that Greedy register allocator should not split single basic block |
| ; if it has only one non-statepoint use. Otherwise we may a redundant register usage. |
| |
| target datalayout = "e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-pc-win64" |
| |
| define ptr addrspace(1) @foo(ptr addrspace(1) %arg) gc "statepoint-example" { |
| ; CHECK-LABEL: foo: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: pushq %rbp |
| ; CHECK-NEXT: .cfi_def_cfa_offset 16 |
| ; CHECK-NEXT: pushq %r15 |
| ; CHECK-NEXT: .cfi_def_cfa_offset 24 |
| ; CHECK-NEXT: pushq %r14 |
| ; CHECK-NEXT: .cfi_def_cfa_offset 32 |
| ; CHECK-NEXT: pushq %r13 |
| ; CHECK-NEXT: .cfi_def_cfa_offset 40 |
| ; CHECK-NEXT: pushq %r12 |
| ; CHECK-NEXT: .cfi_def_cfa_offset 48 |
| ; CHECK-NEXT: pushq %rbx |
| ; CHECK-NEXT: .cfi_def_cfa_offset 56 |
| ; CHECK-NEXT: pushq %rax |
| ; CHECK-NEXT: .cfi_def_cfa_offset 64 |
| ; CHECK-NEXT: .cfi_offset %rbx, -56 |
| ; CHECK-NEXT: .cfi_offset %r12, -48 |
| ; CHECK-NEXT: .cfi_offset %r13, -40 |
| ; CHECK-NEXT: .cfi_offset %r14, -32 |
| ; CHECK-NEXT: .cfi_offset %r15, -24 |
| ; CHECK-NEXT: .cfi_offset %rbp, -16 |
| ; CHECK-NEXT: movq %rdi, (%rsp) # 8-byte Spill |
| ; CHECK-NEXT: movabsq $nocsr, %rax |
| ; CHECK-NEXT: callq *%rax |
| ; CHECK-NEXT: movabsq $bar, %rax |
| ; CHECK-NEXT: movq (%rsp), %rdi # 8-byte Reload |
| ; CHECK-NEXT: callq *%rax # 8-byte Folded Reload |
| ; CHECK-NEXT: .Ltmp0: |
| ; CHECK-NEXT: movabsq $nocsr, %rax |
| ; CHECK-NEXT: callq *%rax |
| ; CHECK-NEXT: movq (%rsp), %rax # 8-byte Reload |
| ; CHECK-NEXT: addq $8, %rsp |
| ; CHECK-NEXT: .cfi_def_cfa_offset 56 |
| ; CHECK-NEXT: popq %rbx |
| ; CHECK-NEXT: .cfi_def_cfa_offset 48 |
| ; CHECK-NEXT: popq %r12 |
| ; CHECK-NEXT: .cfi_def_cfa_offset 40 |
| ; CHECK-NEXT: popq %r13 |
| ; CHECK-NEXT: .cfi_def_cfa_offset 32 |
| ; CHECK-NEXT: popq %r14 |
| ; CHECK-NEXT: .cfi_def_cfa_offset 24 |
| ; CHECK-NEXT: popq %r15 |
| ; CHECK-NEXT: .cfi_def_cfa_offset 16 |
| ; CHECK-NEXT: popq %rbp |
| ; CHECK-NEXT: .cfi_def_cfa_offset 8 |
| ; CHECK-NEXT: retq |
| entry: |
| ; force spill %arg on stack. |
| call void @nocsr() |
| br label %do_call |
| |
| do_call: |
| ; Basic block with two use intructions inside: |
| ; copy to rdi as an argument to call and use in statepoint instruction as gc-live and deopt value. |
| %statepoint_token = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 2882400000, i32 0, ptr elementtype(void (ptr addrspace(1))) @bar, i32 1, i32 0, ptr addrspace(1) %arg, i32 0, i32 0) [ "deopt"(ptr addrspace(1) %arg), "gc-live"(ptr addrspace(1) %arg) ] |
| %arg.reloc = call coldcc ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token %statepoint_token, i32 0, i32 0) |
| br label %next |
| |
| next: |
| ; force spill %arg.reloc on stack. |
| call void @nocsr() |
| ret ptr addrspace(1) %arg.reloc |
| } |
| |
| declare void @nocsr() "no_callee_saved_registers" |
| declare void @bar(ptr addrspace(1)) |
| declare token @llvm.experimental.gc.statepoint.p0(i64 immarg, i32 immarg, ptr, i32 immarg, i32 immarg, ...) |
| declare ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token, i32 immarg, i32 immarg) |