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
diff --git a/utils/FileCheck/FileCheck.cpp b/utils/FileCheck/FileCheck.cpp
index a4aa693..5d4cb0c 100644
--- a/utils/FileCheck/FileCheck.cpp
+++ b/utils/FileCheck/FileCheck.cpp
@@ -659,6 +659,11 @@
}
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);