1 files changed, 89 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/align-branch-boundary-suppressions.ll b/llvm/test/CodeGen/X86/align-branch-boundary-suppressions.ll
new file mode 100644
index 00000000000..7db20187d45
--- /dev/null
+++ b/llvm/test/CodeGen/X86/align-branch-boundary-suppressions.ll
@@ -0,0 +1,89 @@
+; 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:    .byte 102
+; CHECK-NEXT:    .byte 102
+; CHECK-NEXT:    .byte 102
+; CHECK-NEXT:    .byte 102
+; CHECK-NEXT:    .byte 102
+; CHECK-NEXT:    nopw %cs:512(%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, ...)