diff options
author | Xavier Leroy <xavier.leroy@inria.fr> | 2016-05-17 15:37:56 +0200 |
---|---|---|
committer | Xavier Leroy <xavier.leroy@inria.fr> | 2016-05-17 15:37:56 +0200 |
commit | 82f9d1f96b30106a338e77ec83b7321c2c65f929 (patch) | |
tree | 6b8bb30473b1385f8b84fe1600f592c2bd4abed7 /test/c/Results/nsieve | |
parent | 672393ef623acb3e230a8019d51c87e051a7567a (diff) | |
download | compcert-82f9d1f96b30106a338e77ec83b7321c2c65f929.tar.gz compcert-82f9d1f96b30106a338e77ec83b7321c2c65f929.zip |
Introduce register pairs to describe calling conventions more precisely
This commit changes the loc_arguments and loc_result functions that describe calling conventions so that each argument/result can be mapped either to a single location or (in the case of a 64-bit integer) to a pair of two 32-bit locations.
In the current CompCert, all arguments/results of type Tlong are systematically split in two 32-bit halves. We will need to change this in the future to support 64-bit processors. The alternative approach implemented by this commit enables the loc_arguments and loc_result functions to describe precisely which arguments need splitting. Eventually, the remainder of CompCert should not assume anything about splitting 64-bit types in two halves.
Summary of changes:
- AST: introduce the type "rpair A" of register pairs
- Conventions1, Conventions: use it when describing calling conventions
- LTL, Linear, Mach, Asm: honor the new calling conventions when observing external calls
- Events: suppress external_call', no longer useful
- All passes from Allocation to Asmgen: adapt accordingly.
Diffstat (limited to 'test/c/Results/nsieve')
0 files changed, 0 insertions, 0 deletions