3 Commits

Author	SHA1	Message	Date
Eli Friedman	f4a5ef1f00	[GlobalMerge] Allow merging globals with explicit section markings. ... At least on ELF, it's impossible to tell from the object file whether two globals with the same section marking were merged: the merged global uses "private" linkage to hide its symbol, and the aliases look like regular symbols. I can't think of any other reason to disallow it. (Of course, we can only merge globals in the same section.) The weird alignment handling matches AsmPrinter; our alignment handling for global variables should probably be refactored. Differential Revision: https://reviews.llvm.org/D49822 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338791 91177308-0d34-0410-b5e6-96231b3b80d8	2018-08-02 23:54:16 +00:00
Eli Friedman	fab866fa9c	[GlobalMerge] Allow merging globals with arbitrary alignment. ... Instead of depending on implicit padding from the structure layout code, use a packed struct and emit the padding explicitly. Differential Revision: https://reviews.llvm.org/D49710 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337961 91177308-0d34-0410-b5e6-96231b3b80d8	2018-07-25 20:58:01 +00:00
Peter Collingbourne	28f667b461	CodeGen: Make the global-merge pass independently testable, and add a test. ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@270023 91177308-0d34-0410-b5e6-96231b3b80d8	2016-05-19 04:38:56 +00:00