From dc7eb3e023e34adc9d40e93626467cfe22756f4c Mon Sep 17 00:00:00 2001
From: Jim Grosbach <grosbach@apple.com>
Date: Fri, 8 Nov 2013 22:33:06 +0000
Subject: X86: Assembly files with .cfi_cfa_def shouldn't hit
 llvm_unreachable()

On darwin, when trying to create compact unwind info, a .cfi_cfa_def
directive would case an llvm_unreachable() to be hit. Back off when we
see this directive and generate the regular DWARF style eh_frame.

rdar://15406518

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194285 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/MC/X86/cfi_def_cfa-crash.s | 73 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 test/MC/X86/cfi_def_cfa-crash.s

(limited to 'test/MC')

diff --git a/test/MC/X86/cfi_def_cfa-crash.s b/test/MC/X86/cfi_def_cfa-crash.s
new file mode 100644
index 0000000000..9d22d6e281
--- /dev/null
+++ b/test/MC/X86/cfi_def_cfa-crash.s
@@ -0,0 +1,73 @@
+// RUN: llvm-mc -triple x86_64-apple-darwin -filetype=obj %s -o - | macho-dump | FileCheck %s
+
+// We were trying to generate compact unwind info for assembly like this.
+// The .cfi_def_cfa directive, however, throws a wrench into that and was
+// causing an llvm_unreachable() failure. Make sure the assembler can handle
+// the input. The actual eh_frames created using these directives are checked
+// elsewhere. This test is a simpler "does the code assemble" check.
+
+// rdar://15406518
+
+.macro SaveRegisters
+
+ push %rbp
+ .cfi_def_cfa_offset 16
+ .cfi_offset rbp, -16
+
+ mov %rsp, %rbp
+ .cfi_def_cfa_register rbp
+
+ sub $$0x80+8, %rsp
+
+ movdqa %xmm0, -0x80(%rbp)
+ push %rax
+ movdqa %xmm1, -0x70(%rbp)
+ push %rdi
+ movdqa %xmm2, -0x60(%rbp)
+ push %rsi
+ movdqa %xmm3, -0x50(%rbp)
+ push %rdx
+ movdqa %xmm4, -0x40(%rbp)
+ push %rcx
+ movdqa %xmm5, -0x30(%rbp)
+ push %r8
+ movdqa %xmm6, -0x20(%rbp)
+ push %r9
+ movdqa %xmm7, -0x10(%rbp)
+
+.endmacro
+.macro RestoreRegisters
+
+ movdqa -0x80(%rbp), %xmm0
+ pop %r9
+ movdqa -0x70(%rbp), %xmm1
+ pop %r8
+ movdqa -0x60(%rbp), %xmm2
+ pop %rcx
+ movdqa -0x50(%rbp), %xmm3
+ pop %rdx
+ movdqa -0x40(%rbp), %xmm4
+ pop %rsi
+ movdqa -0x30(%rbp), %xmm5
+ pop %rdi
+ movdqa -0x20(%rbp), %xmm6
+ pop %rax
+ movdqa -0x10(%rbp), %xmm7
+
+ leave
+ .cfi_def_cfa rsp, 8
+ .cfi_same_value rbp
+
+.endmacro
+
+_foo:
+.cfi_startproc
+  SaveRegisters
+
+  RestoreRegisters
+  ret
+ .cfi_endproc
+
+
+
+// CHECK: 'section_name', '__eh_frame\x00
-- 
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