| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc -verify-machineinstrs -O3 -enable-implicit-null-checks -mcpu=skylake -x86-align-branch-boundary=32 -x86-align-branch=call+jmp+indirect+ret+jcc < %s | FileCheck %s |
| |
| ;; The tests in this file check that various constructs which need to disable |
| ;; prefix and/or nop padding do so in the right places. However, since we |
| ;; don't yet have assembler syntax for this, they're only able to check |
| ;; comments and must hope the assembler does the right thing. |
| |
| target datalayout = "e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-pc-linux-gnu" |
| |
| ; If we have autopadding enabled, make sure the label isn't separated from |
| ; the mov. |
| define i32 @implicit_null_check(i32* %x) { |
| ; CHECK-LABEL: implicit_null_check: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: #noautopadding |
| ; CHECK-NEXT: .Ltmp0: |
| ; CHECK-NEXT: movl (%rdi), %eax # on-fault: .LBB0_1 |
| ; CHECK-NEXT: #autopadding |
| ; CHECK-NEXT: # %bb.2: # %not_null |
| ; CHECK-NEXT: retq |
| ; CHECK-NEXT: .LBB0_1: # %is_null |
| ; CHECK-NEXT: movl $42, %eax |
| ; CHECK-NEXT: retq |
| |
| entry: |
| %c = icmp eq i32* %x, null |
| br i1 %c, label %is_null, label %not_null, !make.implicit !{} |
| |
| is_null: |
| ret i32 42 |
| |
| not_null: |
| %t = load atomic i32, i32* %x unordered, align 4 |
| ret i32 %t |
| } |
| |
| ; Label must bind to call before |
| define void @test_statepoint(i32 addrspace(1)* %ptr) gc "statepoint-example" { |
| ; CHECK-LABEL: test_statepoint: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: pushq %rax |
| ; CHECK-NEXT: .cfi_def_cfa_offset 16 |
| ; CHECK-NEXT: #noautopadding |
| ; CHECK-NEXT: callq return_i1 |
| ; CHECK-NEXT: .Ltmp1: |
| ; CHECK-NEXT: #autopadding |
| ; CHECK-NEXT: popq %rax |
| ; CHECK-NEXT: .cfi_def_cfa_offset 8 |
| ; CHECK-NEXT: retq |
| entry: |
| call token (i64, i32, i1 ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_i1f(i64 0, i32 0, i1 ()* @return_i1, i32 0, i32 0, i32 0, i32 0) |
| ret void |
| } |
| |
| declare zeroext i1 @return_i1() |
| declare token @llvm.experimental.gc.statepoint.p0f_i1f(i64, i32, i1 ()*, i32, i32, ...) |
| |
| |
| ; Label must bind to following nop sequence |
| define void @patchpoint(i64 %a, i64 %b) { |
| ; CHECK-LABEL: patchpoint: |
| ; CHECK: # %bb.0: # %entry |
| ; CHECK-NEXT: pushq %rbp |
| ; CHECK-NEXT: .cfi_def_cfa_offset 16 |
| ; CHECK-NEXT: .cfi_offset %rbp, -16 |
| ; CHECK-NEXT: movq %rsp, %rbp |
| ; CHECK-NEXT: .cfi_def_cfa_register %rbp |
| ; CHECK-NEXT: #noautopadding |
| ; CHECK-NEXT: .Ltmp2: |
| ; CHECK-NEXT: nopw %cs:512(%rax,%rax) |
| ; CHECK-NEXT: nopl 8(%rax,%rax) |
| ; CHECK-NEXT: #autopadding |
| ; CHECK-NEXT: popq %rbp |
| ; CHECK-NEXT: .cfi_def_cfa %rsp, 8 |
| ; CHECK-NEXT: retq |
| entry: |
| call void (i64, i32, i8*, i32, ...) @llvm.experimental.patchpoint.void(i64 4, i32 15, i8* null, i32 0, i64 %a, i64 %b) |
| ret void |
| } |
| |
| |
| declare void @llvm.experimental.stackmap(i64, i32, ...) |
| declare void @llvm.experimental.patchpoint.void(i64, i32, i8*, i32, ...) |