From ec39f095f5abaf1ec90d7c6c46454032cda36e1c Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Tue, 30 Mar 2010 23:03:27 +0000 Subject: Fix a major source of compile-time slowness at -O0 -g by optimizing the storage of !dbg metadata kinds in the instruction themselves. The on-the-side hash table works great for metadata that not-all instructions get, or for metadata that only exists when optimizing. But when compile-time is everything, it isn't great. I'm not super thrilled with the fact that this plops a TrackingVH in Instruction, because it grows it by 3 words. I'm investigating alternatives, but this should be a step in the right direction in any case. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99957 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/VMCore/LLVMContext.cpp | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'lib/VMCore/LLVMContext.cpp') diff --git a/lib/VMCore/LLVMContext.cpp b/lib/VMCore/LLVMContext.cpp index f9d3fe0021..2a870ec6cf 100644 --- a/lib/VMCore/LLVMContext.cpp +++ b/lib/VMCore/LLVMContext.cpp @@ -26,7 +26,11 @@ LLVMContext& llvm::getGlobalContext() { return *GlobalContext; } -LLVMContext::LLVMContext() : pImpl(new LLVMContextImpl(*this)) { } +LLVMContext::LLVMContext() : pImpl(new LLVMContextImpl(*this)) { + // Create the first metadata kind, which is always 'dbg'. + unsigned DbgID = getMDKindID("dbg"); + assert(DbgID == MD_dbg && "dbg kind id drifted"); (void)DbgID; +} LLVMContext::~LLVMContext() { delete pImpl; } -- cgit v1.2.3