From 1a711b169619e1109cb9affed650f8f12ae85f6e Mon Sep 17 00:00:00 2001 From: Reid Kleckner Date: Tue, 22 Jul 2014 00:53:05 +0000 Subject: -fms-extensions: Implement half of #pragma init_seg Summary: This pragma is very rare. We could *hypothetically* lower some uses of it down to @llvm.global_ctors, but given that GlobalOpt isn't able to optimize prioritized global ctors today, there's really no point. If we wanted to do this in the future, I would check if the section used in the pragma started with ".CRT$XC" and had up to two characters after it. Those two characters could form the 16-bit initialization priority that we support in @llvm.global_ctors. We would have to teach LLVM to lower prioritized global ctors on COFF as well. This should let us compile some silly uses of this pragma in WebKit / Blink. Reviewers: rsmith, majnemer Subscribers: cfe-commits Differential Revision: http://reviews.llvm.org/D4549 llvm-svn: 213593 --- clang/lib/Sema/SemaAttr.cpp | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'clang/lib/Sema/SemaAttr.cpp') diff --git a/clang/lib/Sema/SemaAttr.cpp b/clang/lib/Sema/SemaAttr.cpp index 7c182a1c648..a7d606d545c 100644 --- a/clang/lib/Sema/SemaAttr.cpp +++ b/clang/lib/Sema/SemaAttr.cpp @@ -431,6 +431,15 @@ void Sema::ActOnPragmaMSSection(SourceLocation PragmaLocation, UnifySection(SegmentName->getString(), SectionFlags, PragmaLocation); } +void Sema::ActOnPragmaMSInitSeg(SourceLocation PragmaLocation, + StringLiteral *SegmentName) { + // There's no stack to maintain, so we just have a current section. When we + // see the default section, reset our current section back to null so we stop + // tacking on unnecessary attributes. + CurInitSeg = SegmentName->getString() == ".CRT$XCU" ? nullptr : SegmentName; + CurInitSegLoc = PragmaLocation; +} + void Sema::ActOnPragmaUnused(const Token &IdTok, Scope *curScope, SourceLocation PragmaLoc) { -- cgit v1.2.3