From 36b699f2b139a30a2dfa4448223d6985b55daa8a Mon Sep 17 00:00:00 2001 From: Chandler Carruth Date: Sun, 9 Mar 2014 03:16:01 +0000 Subject: [C++11] Add range based accessors for the Use-Def chain of a Value. This requires a number of steps. 1) Move value_use_iterator into the Value class as an implementation detail 2) Change it to actually be a *Use* iterator rather than a *User* iterator. 3) Add an adaptor which is a User iterator that always looks through the Use to the User. 4) Wrap these in Value::use_iterator and Value::user_iterator typedefs. 5) Add the range adaptors as Value::uses() and Value::users(). 6) Update *all* of the callers to correctly distinguish between whether they wanted a use_iterator (and to explicitly dig out the User when needed), or a user_iterator which makes the Use itself totally opaque. Because #6 requires churning essentially everything that walked the Use-Def chains, I went ahead and added all of the range adaptors and switched them to range-based loops where appropriate. Also because the renaming requires at least churning every line of code, it didn't make any sense to split these up into multiple commits -- all of which would touch all of the same lies of code. The result is still not quite optimal. The Value::use_iterator is a nice regular iterator, but Value::user_iterator is an iterator over User*s rather than over the User objects themselves. As a consequence, it fits a bit awkwardly into the range-based world and it has the weird extra-dereferencing 'operator->' that so many of our iterators have. I think this could be fixed by providing something which transforms a range of T&s into a range of T*s, but that *can* be separated into another patch, and it isn't yet 100% clear whether this is the right move. However, this change gets us most of the benefit and cleans up a substantial amount of code around Use and User. =] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203364 91177308-0d34-0410-b5e6-96231b3b80d8 --- tools/opt/AnalysisWrappers.cpp | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) (limited to 'tools/opt') diff --git a/tools/opt/AnalysisWrappers.cpp b/tools/opt/AnalysisWrappers.cpp index 1774ea0295..4bdc268f8d 100644 --- a/tools/opt/AnalysisWrappers.cpp +++ b/tools/opt/AnalysisWrappers.cpp @@ -37,12 +37,11 @@ namespace { if (!I->isDeclaration()) continue; bool PrintedFn = false; - for (Value::use_iterator UI = I->use_begin(), E = I->use_end(); - UI != E; ++UI) { - Instruction *User = dyn_cast(*UI); - if (!User) continue; + for (User *U : I->users()) { + Instruction *UI = dyn_cast(U); + if (!UI) continue; - CallSite CS(cast(User)); + CallSite CS(cast(UI)); if (!CS) continue; for (CallSite::arg_iterator AI = CS.arg_begin(), @@ -53,7 +52,7 @@ namespace { errs() << "Function '" << I->getName() << "':\n"; PrintedFn = true; } - errs() << *User; + errs() << *UI; break; } } -- cgit v1.2.3