aboutsummaryrefslogtreecommitdiff
path: root/lib/Target/CBackend/CBackend.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'lib/Target/CBackend/CBackend.cpp')
-rw-r--r--lib/Target/CBackend/CBackend.cpp4
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp
index 83704a34d1..ac7251f898 100644
--- a/lib/Target/CBackend/CBackend.cpp
+++ b/lib/Target/CBackend/CBackend.cpp
@@ -1281,8 +1281,8 @@ static void generateCompilerSpecificCode(std::ostream& Out) {
// Alloca is hard to get, and we don't want to include stdlib.h here.
Out << "/* get a declaration for alloca */\n"
<< "#if defined(__CYGWIN__) || defined(__MINGW32__)\n"
- << "extern void *_alloca(unsigned long);\n"
- << "#define alloca(x) _alloca(x)\n"
+ << "#define alloca(x) __builtin_alloca((x))\n"
+ << "#define _alloca(x) __builtin_alloca((x))\n"
<< "#elif defined(__APPLE__)\n"
<< "extern void *__builtin_alloca(unsigned long);\n"
<< "#define alloca(x) __builtin_alloca(x)\n"