From d41a46e942f6af11d74098fb7b951c0df00b7e0a Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Mon, 15 Sep 2014 22:11:07 +0000
Subject: [PATCH] Add back tests for empty function in SPARC and PowerPC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217834 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/CodeGen/PowerPC/empty-functions.ll | 43 +++++++++++++++++++++++++++++++++
 test/CodeGen/SPARC/empty-functions.ll   | 32 ++++++++++++++++++++++++
 2 files changed, 75 insertions(+)
 create mode 100644 test/CodeGen/PowerPC/empty-functions.ll
 create mode 100644 test/CodeGen/SPARC/empty-functions.ll

diff --git a/test/CodeGen/PowerPC/empty-functions.ll b/test/CodeGen/PowerPC/empty-functions.ll
new file mode 100644
index 00000000000..e32a8472b83
--- /dev/null
+++ b/test/CodeGen/PowerPC/empty-functions.ll
@@ -0,0 +1,43 @@
+; RUN: llc < %s -mtriple=powerpc-apple-darwin | FileCheck -check-prefix=CHECK-MACHO %s
+; RUN: llc < %s -mtriple=powerpc-apple-darwin -disable-fp-elim | FileCheck -check-prefix=CHECK-MACHO %s
+; RUN: llc < %s -mtriple=powerpc-linux-gnu | FileCheck -check-prefix=LINUX-NO-FP %s
+; RUN: llc < %s -mtriple=powerpc-linux-gnu -disable-fp-elim | FileCheck -check-prefix=LINUX-FP %s
+
+define void @func() {
+entry:
+  unreachable
+}
+
+; MachO cannot handle an empty function.
+; CHECK-MACHO:     _func:
+; CHECK-MACHO-NEXT: .cfi_startproc
+; CHECK-MACHO-NEXT: {{^}};
+; CHECK-MACHO-NEXT:     nop
+; CHECK-MACHO-NEXT: .cfi_endproc
+
+; An empty function is perfectly fine on ELF.
+; LINUX-NO-FP: func:
+; LINUX-NO-FP-NEXT: .cfi_startproc
+; LINUX-NO-FP-NEXT: {{^}}#
+; LINUX-NO-FP-NEXT: {{^}}.L{{.*}}:{{$}}
+; LINUX-NO-FP-NEXT: .size   func, .L{{.*}}-func
+; LINUX-NO-FP-NEXT: .cfi_endproc
+
+; A cfi directive can point to the end of a function. It (and in fact the
+; entire body) could be optimized out because of the unreachable, but we
+; don't do it right now.
+; LINUX-FP: func:
+; LINUX-FP-NEXT: .cfi_startproc
+; LINUX-FP-NEXT: {{^}}#
+; LINUX-FP-NEXT: stw 31, -4(1)
+; LINUX-FP-NEXT: stwu 1, -16(1)
+; LINUX-FP-NEXT: {{^}}.L{{.*}}:{{$}}
+; LINUX-FP-NEXT:  .cfi_def_cfa_offset 16
+; LINUX-FP-NEXT: {{^}}.L{{.*}}:{{$}}
+; LINUX-FP-NEXT: .cfi_offset r31, -4
+; LINUX-FP-NEXT: mr 31, 1
+; LINUX-FP-NEXT:{{^}}.L{{.*}}:{{$}}
+; LINUX-FP-NEXT: .cfi_def_cfa_register r31
+; LINUX-FP-NEXT:{{^}}.L{{.*}}:{{$}}
+; LINUX-FP-NEXT: .size   func, .Ltmp3-func
+; LINUX-FP-NEXT: .cfi_endproc
diff --git a/test/CodeGen/SPARC/empty-functions.ll b/test/CodeGen/SPARC/empty-functions.ll
new file mode 100644
index 00000000000..38d288903d4
--- /dev/null
+++ b/test/CodeGen/SPARC/empty-functions.ll
@@ -0,0 +1,32 @@
+; RUN: llc < %s -mtriple=sparc-linux-gnu | FileCheck -check-prefix=LINUX-NO-FP %s
+; RUN: llc < %s -mtriple=sparc-linux-gnu -disable-fp-elim | FileCheck -check-prefix=LINUX-FP %s
+
+define void @func() {
+entry:
+  unreachable
+}
+
+; An empty function is perfectly fine on ELF.
+; LINUX-NO-FP: func:
+; LINUX-NO-FP-NEXT: .cfi_startproc
+; LINUX-NO-FP-NEXT: {{^}}!
+; LINUX-NO-FP-NEXT: {{^}}.L{{.*}}:{{$}}
+; LINUX-NO-FP-NEXT: .size   func, .L{{.*}}-func
+; LINUX-NO-FP-NEXT: .cfi_endproc
+
+; A cfi directive can point to the end of a function. It (and in fact the
+; entire body) could be optimized out because of the unreachable, but we
+; don't do it right now.
+; LINUX-FP: func:
+; LINUX-FP-NEXT: .cfi_startproc
+; LINUX-FP-NEXT: {{^}}!
+; LINUX-FP-NEXT: save %sp, -96, %sp
+; LINUX-FP-NEXT: {{^}}.L{{.*}}:{{$}}
+; LINUX-FP-NEXT: .cfi_def_cfa_register %fp
+; LINUX-FP-NEXT: {{^}}.L{{.*}}:{{$}}
+; LINUX-FP-NEXT: .cfi_window_save
+; LINUX-FP-NEXT: {{^}}.L{{.*}}:{{$}}
+; LINUX-FP-NEXT: .cfi_register 15, 31
+; LINUX-FP-NEXT: {{^}}.L{{.*}}:{{$}}
+; LINUX-FP-NEXT: .size   func, .Ltmp3-func
+; LINUX-FP-NEXT: .cfi_endproc
-- 
2.11.0