llvm-project

Commit Graph

Author	SHA1	Message	Date
Ayke van Laethem	3ab1c97e35	[AVR] Fix stack size in functions with a frame pointer This patch fixes a bug in stack save/restore code. Because the frame pointer was saved/restored manually (not by marking it as clobbered) the StackSize variable was not updated accordingly. Most code still worked, but code that tried to load a parameter passed on the stack did not. This commit fixes this by marking the frame pointer as a callee-clobbered register. This will let it be saved without any effort in prolog/epilog code and will make sure the correct address is calculated for loading parameters that are passed on the stack. This approach is used by most other targets (such as X86, AArch64 and RISC-V). Differential Revision: https://reviews.llvm.org/D78579	2020-06-16 13:53:32 +02:00
Dylan McKay	28355efdad	[AVR] Save/restore the frame pointer for all functions A recent commit I made made it so that we only did this for signal or interrupt handlers. This broke normal functions. llvm-svn: 301893	2017-05-02 01:57:48 +00:00
Dylan McKay	bf1d2edab2	[AVR] Add calling convention CodeGen tests This adds CodeGen tests for the AVR C calling convention. llvm-svn: 289369	2016-12-11 07:09:45 +00:00

Author

SHA1

Message

Date

Ayke van Laethem

3ab1c97e35

[AVR] Fix stack size in functions with a frame pointer

This patch fixes a bug in stack save/restore code. Because the frame
pointer was saved/restored manually (not by marking it as clobbered) the
StackSize variable was not updated accordingly. Most code still worked,
but code that tried to load a parameter passed on the stack did not.

This commit fixes this by marking the frame pointer as a
callee-clobbered register. This will let it be saved without any effort
in prolog/epilog code and will make sure the correct address is
calculated for loading parameters that are passed on the stack.

This approach is used by most other targets (such as X86, AArch64 and
RISC-V).

Differential Revision: https://reviews.llvm.org/D78579

2020-06-16 13:53:32 +02:00

Dylan McKay

28355efdad

[AVR] Save/restore the frame pointer for all functions

A recent commit I made made it so that we only did this for signal or
interrupt handlers. This broke normal functions.

llvm-svn: 301893

2017-05-02 01:57:48 +00:00

Dylan McKay

bf1d2edab2

[AVR] Add calling convention CodeGen tests

This adds CodeGen tests for the AVR C calling convention.

llvm-svn: 289369

2016-12-11 07:09:45 +00:00

3 Commits