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-rw-r--r--lib/Target/X86/X86JITInfo.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/Target/X86/X86JITInfo.cpp b/lib/Target/X86/X86JITInfo.cpp
index 5f88da5f89..441c3b4f31 100644
--- a/lib/Target/X86/X86JITInfo.cpp
+++ b/lib/Target/X86/X86JITInfo.cpp
@@ -47,6 +47,9 @@ static TargetJITInfo::JITCompilerFn JITCompilerFunction;
#define GETASMPREFIX(X) GETASMPREFIX2(X)
#define ASMPREFIX GETASMPREFIX(__USER_LABEL_PREFIX__)
+// Provide a convenient way for disable usage of CFI directives.
+// This is needed for old/broken assemblers (for example, gas on
+// Darwin is pretty old and doesn't support these directives)
#if defined(__APPLE__)
# define CFI(x)
#else