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Do not make -pass-remarks additive.

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Summary:
When I initially introduced -pass-remarks, I thought it would be a
neat idea to make it additive. So, if one used it as:

$ llc -pass-remarks=inliner --pass-remarks=loop.*

the compiler would build the regular expression '(inliner)|(loop.*)'.

The more I think about it, the more I regret it. This is not how
other flags work. The standard semantics are right-to-left overrides.

This is how clang interprets -Rpass. And I think the two should be
compatible in this respect.

Reviewers: qcolombet

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D3614

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208122 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Diego Novillo 2014-05-06 19:14:00 +00:00
parent 2c06cd8612
commit e3e870face
2 changed files with 8 additions and 11 deletions
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12
lib/IR/LLVMContextImpl.cpp
View File

@ -73,22 +73,12 @@ namespace {
/// LLVMContext::emitOptimizationRemark.
static Regex *OptimizationRemarkPattern = nullptr;
/// \brief String to hold all the values passed via -pass-remarks. Every
/// instance of -pass-remarks on the command line will be concatenated
/// to this string. Values are stored inside braces and concatenated with
/// the '|' operator. This implements the expected semantics that multiple
/// -pass-remarks are additive.
static std::string OptimizationRemarkExpr;
struct PassRemarksOpt {
void operator=(const std::string &Val) const {
// Create a regexp object to match pass names for emitOptimizationRemark.
if (!Val.empty()) {
if (!OptimizationRemarkExpr.empty())
OptimizationRemarkExpr += "|";
OptimizationRemarkExpr += "(" + Val + ")";
delete OptimizationRemarkPattern;
OptimizationRemarkPattern = new Regex(OptimizationRemarkExpr);
OptimizationRemarkPattern = new Regex(Val);
std::string RegexError;
if (!OptimizationRemarkPattern->isValid(RegexError))
report_fatal_error("Invalid regular expression '" + Val +

7
test/Other/optimization-remarks-inline.ll
View File

@ -1,7 +1,14 @@
; RUN: opt < %s -inline -pass-remarks='inline' -S 2>&1 | FileCheck %s
; RUN: opt < %s -inline -pass-remarks='inl.*' -S 2>&1 | FileCheck %s
; RUN: opt < %s -inline -pass-remarks='vector' -pass-remarks='inl' -S 2>&1 | FileCheck %s
; These two should not yield an inline remark for the same reason.
; In the first command, we only ask for vectorizer remarks, in the
; second one we ask for the inliner, but we then ask for the vectorizer
; (thus overriding the first flag).
; RUN: opt < %s -inline -pass-remarks='vector' -S 2>&1 | FileCheck --check-prefix=REMARKS %s
; RUN: opt < %s -inline -pass-remarks='inl' -pass-remarks='vector' -S 2>&1 | FileCheck --check-prefix=REMARKS %s
; RUN: opt < %s -inline -S 2>&1 | FileCheck --check-prefix=REMARKS %s
; RUN: not opt < %s -pass-remarks='(' 2>&1 | FileCheck --check-prefix=BAD-REGEXP %s