From 01b2d6131145bfa3c9c4c1598edeaac13155e1a5 Mon Sep 17 00:00:00 2001
From: John Criswell <criswell@uiuc.edu>
Date: Wed, 10 Dec 2003 18:06:34 +0000
Subject: [PATCH] Fixed the CBE on Solaris/Sparc.  We need to define the return
 value of the write() system call because it returns 64 bits on Solaris 64
 bit, and an implicit return value of int says it returns 32 bits. Admittedly,
 this is a bit of a hack.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10375 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/CBackend/CBackend.cpp | 9 ++++++++-
 lib/Target/CBackend/Writer.cpp   | 9 ++++++++-
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp
index eeb2bdd4f3b..faa9b925dd1 100644
--- a/lib/Target/CBackend/CBackend.cpp
+++ b/lib/Target/CBackend/CBackend.cpp
@@ -1087,13 +1087,20 @@ void CWriter::visitInvokeInst(InvokeInst &II) {
 
 
 void CWriter::visitUnwindInst(UnwindInst &I) {
+  // Determine the return size of write() based on the data model.
+#ifdef _LP64
+      const char * writedecl = "    extern signed long long write();\n";
+#else
+      const char * writedecl = "    extern write();\n";
+#endif
+
   // The unwind instructions causes a control flow transfer out of the current
   // function, unwinding the stack until a caller who used the invoke
   // instruction is found.  In this context, we code generated the invoke
   // instruction to add an entry to the top of the jmpbuf_list.  Thus, here we
   // just have to longjmp to the specified handler.
   Out << "  if (__llvm_jmpbuf_list == 0) {  /* unwind */\n"
-      << "    extern write();\n"
+      << writedecl
       << "    ((void (*)(int, void*, unsigned))write)(2,\n"
       << "           \"throw found with no handler!\\n\", 31); abort();\n"
       << "  }\n"
diff --git a/lib/Target/CBackend/Writer.cpp b/lib/Target/CBackend/Writer.cpp
index eeb2bdd4f3b..faa9b925dd1 100644
--- a/lib/Target/CBackend/Writer.cpp
+++ b/lib/Target/CBackend/Writer.cpp
@@ -1087,13 +1087,20 @@ void CWriter::visitInvokeInst(InvokeInst &II) {
 
 
 void CWriter::visitUnwindInst(UnwindInst &I) {
+  // Determine the return size of write() based on the data model.
+#ifdef _LP64
+      const char * writedecl = "    extern signed long long write();\n";
+#else
+      const char * writedecl = "    extern write();\n";
+#endif
+
   // The unwind instructions causes a control flow transfer out of the current
   // function, unwinding the stack until a caller who used the invoke
   // instruction is found.  In this context, we code generated the invoke
   // instruction to add an entry to the top of the jmpbuf_list.  Thus, here we
   // just have to longjmp to the specified handler.
   Out << "  if (__llvm_jmpbuf_list == 0) {  /* unwind */\n"
-      << "    extern write();\n"
+      << writedecl
       << "    ((void (*)(int, void*, unsigned))write)(2,\n"
       << "           \"throw found with no handler!\\n\", 31); abort();\n"
       << "  }\n"