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[LTO] Add error message on IO error in compileOptimizedToFile.

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(No testcase because it's difficult to force an error here.)

Differential Revision: https://reviews.llvm.org/D26371

llvm-svn: 286177
This commit is contained in:
Eli Friedman 2016-11-07 23:43:07 +00:00
parent acf03cea42
commit cded552ec7
1 changed files with 2 additions and 0 deletions
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2
lib/LTO/LTOCodeGenerator.cpp
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@ -257,6 +257,8 @@ bool LTOCodeGenerator::compileOptimizedToFile(const char **Name) {
bool genResult = compileOptimized(&objFile.os());
objFile.os().close();
if (objFile.os().has_error()) {
Twine ErrMsg = "could not write object file: " + Filename.str();
emitError(ErrMsg.str());
objFile.os().clear_error();
sys::fs::remove(Twine(Filename));
return false;