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Demote the "Debug Info Version" module flag to llvm::Module::Warning 

behavior on mismatch. The AutoUpgrader will drop incompatible debug info
any way and also emit a warning diagnostic for it.

rdar://problem/16926122

llvm-svn: 209182
This commit is contained in:
Adrian Prantl 2014-05-19 23:40:06 +00:00
parent 1fc760add4
commit 2dbdd20d37
2 changed files with 5 additions and 7 deletions
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10
clang/lib/CodeGen/CodeGenModule.cpp
View File

@ -301,12 +301,10 @@ void CodeGenModule::Release() {
getModule().addModuleFlag(llvm::Module::Warning, "Dwarf Version",
CodeGenOpts.DwarfVersion);
if (DebugInfo)
// We support a single version in the linked module: error out when
// modules do not have the same version. We are going to implement dropping
// debug info when the version number is not up-to-date. Once that is
// done, the bitcode linker is not going to see modules with different
// version numbers.
getModule().addModuleFlag(llvm::Module::Error, "Debug Info Version",
// We support a single version in the linked module. The LLVM
// parser will drop debug info with a different version number
// (and warn about it, too).
getModule().addModuleFlag(llvm::Module::Warning, "Debug Info Version",
llvm::DEBUG_METADATA_VERSION);
SimplifyPersonality();

2
clang/test/CodeGen/debug-info-version.c
View File

@ -4,5 +4,5 @@ int main (void) {
return 0;
}
// CHECK: metadata !{i32 1, metadata !"Debug Info Version", i32 1}
// CHECK: metadata !{i32 2, metadata !"Debug Info Version", i32 1}
// NO_DEBUG-NOT: metadata !"Debug Info Version"