derek.holloway
7502bf64a4
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90 lines
2.9 KiB
LLVM
90 lines
2.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; 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
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;; The tests in this file check that various constructs which need to disable
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;; prefix and/or nop padding do so in the right places. However, since we
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;; don't yet have assembler syntax for this, they're only able to check
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;; comments and must hope the assembler does the right thing.
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target datalayout = "e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-linux-gnu"
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; If we have autopadding enabled, make sure the label isn't separated from
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; the mov.
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define i32 @implicit_null_check(ptr %x) {
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; CHECK-LABEL: implicit_null_check:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: #noautopadding
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; CHECK-NEXT: .Ltmp0:
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; CHECK-NEXT: movl (%rdi), %eax # on-fault: .LBB0_1
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; CHECK-NEXT: #autopadding
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; CHECK-NEXT: # %bb.2: # %not_null
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; CHECK-NEXT: retq
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; CHECK-NEXT: .LBB0_1: # %is_null
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; CHECK-NEXT: movl $42, %eax
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; CHECK-NEXT: retq
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entry:
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%c = icmp eq ptr %x, null
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br i1 %c, label %is_null, label %not_null, !make.implicit !{}
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is_null:
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ret i32 42
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not_null:
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%t = load atomic i32, ptr %x unordered, align 4
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ret i32 %t
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}
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; Label must bind to call before
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define void @test_statepoint(ptr addrspace(1) %ptr) gc "statepoint-example" {
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; CHECK-LABEL: test_statepoint:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pushq %rax
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: #noautopadding
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; CHECK-NEXT: callq return_i1@PLT
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; CHECK-NEXT: .Ltmp1:
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; CHECK-NEXT: #autopadding
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; CHECK-NEXT: popq %rax
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; CHECK-NEXT: .cfi_def_cfa_offset 8
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; CHECK-NEXT: retq
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entry:
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call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr elementtype(i1 ()) @return_i1, i32 0, i32 0, i32 0, i32 0)
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ret void
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}
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declare zeroext i1 @return_i1()
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declare token @llvm.experimental.gc.statepoint.p0(i64, i32, ptr, i32, i32, ...)
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; Label must bind to following nop sequence
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define void @patchpoint(i64 %a, i64 %b) {
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; CHECK-LABEL: patchpoint:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: pushq %rbp
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: .cfi_offset %rbp, -16
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; CHECK-NEXT: movq %rsp, %rbp
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; CHECK-NEXT: .cfi_def_cfa_register %rbp
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; CHECK-NEXT: #noautopadding
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; CHECK-NEXT: .Ltmp2:
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; CHECK-NEXT: .byte 102
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; CHECK-NEXT: .byte 102
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; CHECK-NEXT: .byte 102
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; CHECK-NEXT: .byte 102
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; CHECK-NEXT: .byte 102
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; CHECK-NEXT: nopw %cs:512(%rax,%rax)
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; CHECK-NEXT: #autopadding
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; CHECK-NEXT: popq %rbp
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; CHECK-NEXT: .cfi_def_cfa %rsp, 8
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; CHECK-NEXT: retq
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entry:
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call void (i64, i32, ptr, i32, ...) @llvm.experimental.patchpoint.void(i64 4, i32 15, ptr null, i32 0, i64 %a, i64 %b)
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ret void
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}
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declare void @llvm.experimental.stackmap(i64, i32, ...)
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declare void @llvm.experimental.patchpoint.void(i64, i32, ptr, i32, ...)
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