From d81b53817b1509216ac694d4bd68f145fa28ef8d Mon Sep 17 00:00:00 2001
From: Boris Ulasevich <boris.ulasevich@gmail.com>
Date: Tue, 17 Jan 2017 13:27:28 +0000
Subject: BrainF example: fixing output buffering issue Differential Revision:
 https://reviews.llvm.org/D27824

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292216 91177308-0d34-0410-b5e6-96231b3b80d8
---
 examples/BrainF/BrainFDriver.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'examples')

diff --git a/examples/BrainF/BrainFDriver.cpp b/examples/BrainF/BrainFDriver.cpp
index 57a86fbf521..d704506d244 100644
--- a/examples/BrainF/BrainFDriver.cpp
+++ b/examples/BrainF/BrainFDriver.cpp
@@ -166,6 +166,10 @@ int main(int argc, char **argv) {
     std::vector<GenericValue> args;
     Function *brainf_func = M.getFunction("brainf");
     GenericValue gv = ee->runFunction(brainf_func, args);
+    // Genereated code calls putchar, and output is not guaranteed without fflush.
+    // The better place for fflush(stdout) call would be the generated code, but it
+    // is unmanageable because stdout linkage name depends on stdlib implementation.
+    fflush(stdout);
   } else {
     WriteBitcodeToFile(Mod.get(), *out);
   }
-- 
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