commit | edeeb6e8dc496d270cdaaf5e18441cfc7e3b5e79 | [log] [tgz] |
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author | Reid Kleckner <rnk@google.com> | Tue Sep 11 22:00:50 2018 +0000 |
committer | Reid Kleckner <rnk@google.com> | Tue Sep 11 22:00:50 2018 +0000 |
tree | 9908ea6c888b762195b21e9f369b75405ff20d68 | |
parent | 8b18243c17d3606c4f96b467e6b7f929b6e66516 [diff] |
[codeview] Decode and dump FP regs from S_FRAMEPROC records Summary: There are two registers encoded in the S_FRAMEPROC flags: one for locals and one for parameters. The encoding is described by the ExpandEncodedBasePointerReg function in cvinfo.h. Two bits are used to indicate one of four possible values: 0: no register - Used when there are no variables. 1: SP / standard - Variables are stored relative to the standard SP for the ISA. 2: FP - Variables are addressed relative to the ISA frame pointer, i.e. EBP on x86. If realignment is required, parameters use this. If a dynamic alloca is used, locals will be EBP relative. 3: Alternative - Variables are stored relative to some alternative third callee-saved register. This is required to address highly aligned locals when there are dynamic stack adjustments. In this case, both the incoming SP saved in the standard FP and the current SP are at some dynamic offset from the locals. LLVM uses ESI in this case, MSVC uses EBX. Most of the changes in this patch are to pass around the CPU so that we can decode these into real, named architectural registers. Subscribers: hiraditya Differential Revision: https://reviews.llvm.org/D51894 git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@341999 91177308-0d34-0410-b5e6-96231b3b80d8
This directory and its subdirectories contain source code for the LLVM Linker, a modular cross platform linker which is built as part of the LLVM compiler infrastructure project.
lld is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt.
In order to make sure various developers can evaluate patches over the same tests, we create a collection of self contained programs.
It is hosted at https://s3-us-west-2.amazonaws.com/linker-tests/lld-speed-test.tar.xz
The current sha256 is 10eec685463d5a8bbf08d77f4ca96282161d396c65bd97dc99dbde644a31610f.