From 1aac1864cfb66ae3d322ff7e28738d03bc1d1bfc Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Wed, 9 Feb 2011 16:46:02 +0000
Subject: [PATCH] emit a specific error when the input file is empty. This
fixes an annoyance of mine when working on tests: if the input .ll file is
broken, opt outputs an error and generates an empty file. FileCheck then
emits its "ooh I couldn't find the first CHECK line, scanning from ..." which
obfuscates the actual problem.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125193 91177308-0d34-0410-b5e6-96231b3b80d8
---
utils/FileCheck/FileCheck.cpp | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/utils/FileCheck/FileCheck.cpp b/utils/FileCheck/FileCheck.cpp
index a4aa693448b..5d4cb0c0c5f 100644
--- a/utils/FileCheck/FileCheck.cpp
+++ b/utils/FileCheck/FileCheck.cpp
@@ -659,6 +659,11 @@ int main(int argc, char **argv) {
}
MemoryBuffer *F = File.take();
+ if (F->getBufferSize() == 0) {
+ errs() << "FileCheck error: '" << InputFilename << "' is empty.\n";
+ return 1;
+ }
+
// Remove duplicate spaces in the input file if requested.
if (!NoCanonicalizeWhiteSpace)
F = CanonicalizeInputFile(F);