1 files changed, 27 insertions, 0 deletions
diff --git a/test/MC/X86/AlignedBundling/long-nop-pad.s b/test/MC/X86/AlignedBundling/long-nop-pad.s
new file mode 100644
index 000000000000..ea33e2889b9e
--- /dev/null
+++ b/test/MC/X86/AlignedBundling/long-nop-pad.s
@@ -0,0 +1,27 @@
+# RUN: llvm-mc -filetype=obj -triple x86_64-pc-linux-gnu %s -o - \
+# RUN:   | llvm-objdump -disassemble -no-show-raw-insn - | FileCheck %s
+
+# Test that long nops are generated for padding where possible.
+
+  .text
+foo:
+  .bundle_align_mode 5
+
+# This callq instruction is 5 bytes long
+  .bundle_lock align_to_end
+  callq   bar
+  .bundle_unlock
+# To align this group to a bundle end, we need a 15-byte NOP and a 12-byte NOP.
+# CHECK:        0:  nop
+# CHECK-NEXT:   f:  nop
+# CHECK-NEXT:   1b: callq
+
+# This push instruction is 1 byte long
+  .bundle_lock align_to_end
+  push %rax
+  .bundle_unlock
+# To align this group to a bundle end, we need two 15-byte NOPs, and a 1-byte.
+# CHECK:        20:  nop
+# CHECK-NEXT:   2f:  nop
+# CHECK-NEXT:   3e:  nop
+# CHECK-NEXT:   3f: pushq