1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2; 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 3 4;; The tests in this file check that various constructs which need to disable 5;; prefix and/or nop padding do so in the right places. However, since we 6;; don't yet have assembler syntax for this, they're only able to check 7;; comments and must hope the assembler does the right thing. 8 9target datalayout = "e-i64:64-f80:128-n8:16:32:64-S128" 10target triple = "x86_64-pc-linux-gnu" 11 12; If we have autopadding enabled, make sure the label isn't separated from 13; the mov. 14define i32 @implicit_null_check(i32* %x) { 15; CHECK-LABEL: implicit_null_check: 16; CHECK: # %bb.0: # %entry 17; CHECK-NEXT: #noautopadding 18; CHECK-NEXT: .Ltmp0: 19; CHECK-NEXT: movl (%rdi), %eax # on-fault: .LBB0_1 20; CHECK-NEXT: #autopadding 21; CHECK-NEXT: # %bb.2: # %not_null 22; CHECK-NEXT: retq 23; CHECK-NEXT: .LBB0_1: # %is_null 24; CHECK-NEXT: movl $42, %eax 25; CHECK-NEXT: retq 26 27 entry: 28 %c = icmp eq i32* %x, null 29 br i1 %c, label %is_null, label %not_null, !make.implicit !{} 30 31 is_null: 32 ret i32 42 33 34 not_null: 35 %t = load atomic i32, i32* %x unordered, align 4 36 ret i32 %t 37} 38 39; Label must bind to call before 40define void @test_statepoint(i32 addrspace(1)* %ptr) gc "statepoint-example" { 41; CHECK-LABEL: test_statepoint: 42; CHECK: # %bb.0: # %entry 43; CHECK-NEXT: pushq %rax 44; CHECK-NEXT: .cfi_def_cfa_offset 16 45; CHECK-NEXT: #noautopadding 46; CHECK-NEXT: callq return_i1@PLT 47; CHECK-NEXT: .Ltmp1: 48; CHECK-NEXT: #autopadding 49; CHECK-NEXT: popq %rax 50; CHECK-NEXT: .cfi_def_cfa_offset 8 51; CHECK-NEXT: retq 52entry: 53 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) 54 ret void 55} 56 57declare zeroext i1 @return_i1() 58declare token @llvm.experimental.gc.statepoint.p0f_i1f(i64, i32, i1 ()*, i32, i32, ...) 59 60 61; Label must bind to following nop sequence 62define void @patchpoint(i64 %a, i64 %b) { 63; CHECK-LABEL: patchpoint: 64; CHECK: # %bb.0: # %entry 65; CHECK-NEXT: pushq %rbp 66; CHECK-NEXT: .cfi_def_cfa_offset 16 67; CHECK-NEXT: .cfi_offset %rbp, -16 68; CHECK-NEXT: movq %rsp, %rbp 69; CHECK-NEXT: .cfi_def_cfa_register %rbp 70; CHECK-NEXT: #noautopadding 71; CHECK-NEXT: .Ltmp2: 72; CHECK-NEXT: .byte 102 73; CHECK-NEXT: .byte 102 74; CHECK-NEXT: .byte 102 75; CHECK-NEXT: .byte 102 76; CHECK-NEXT: .byte 102 77; CHECK-NEXT: nopw %cs:512(%rax,%rax) 78; CHECK-NEXT: #autopadding 79; CHECK-NEXT: popq %rbp 80; CHECK-NEXT: .cfi_def_cfa %rsp, 8 81; CHECK-NEXT: retq 82entry: 83 call void (i64, i32, i8*, i32, ...) @llvm.experimental.patchpoint.void(i64 4, i32 15, i8* null, i32 0, i64 %a, i64 %b) 84 ret void 85} 86 87 88declare void @llvm.experimental.stackmap(i64, i32, ...) 89declare void @llvm.experimental.patchpoint.void(i64, i32, i8*, i32, ...) 90