[llc] New diagnostic handler

Without a diagnostic handler installed, llc's behaviour is to exit on the first
error that it encounters. This is very different from the behaviour of clang
and other front ends, which try to gather as many errors as possible before
exiting.

This commit adds a diagnostic handler to llc, allowing it to find and report
more than one error. The old behaviour is preserved under a flag (-exit-on-error).

Some of the tests fail with the new diagnostic handler, so they have to use the
new flag in order to run under the previous behaviour. Some of these are known
bugs, others need further investigation. Ideally, we should fix the tests and
remove the flag at some point in the future.

Patch by Diana Picus.

llvm-svn: 269428

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/test/CodeGen/MIR/Generic/machine-function-missing-function.mir b/llvm/test/CodeGen/MIR/Generic/machine-function-missing-function.mir
index 6800f872432..128a98720c2 100644
--- a/llvm/test/CodeGen/MIR/Generic/machine-function-missing-function.mir
+++ b/llvm/test/CodeGen/MIR/Generic/machine-function-missing-function.mir
@@ -1,4 +1,4 @@
-# RUN: not llc -start-after branch-folder -stop-after branch-folder -o /dev/null %s 2>&1 | FileCheck %s
+# RUN: not llc -start-after branch-folder -stop-after branch-folder -exit-on-error -o /dev/null %s 2>&1 | FileCheck %s
 # This test ensures that an error is reported when the mir file has LLVM IR and
 # one of the machine functions has a name that doesn't match any function in
 # the LLVM IR.