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| author | Jeevitha <jeevitha@linux.ibm.com> | 2023-12-25 04:06:54 -0600 |
|---|---|---|
| committer | Jeevitha <jeevitha@linux.ibm.com> | 2023-12-25 04:06:54 -0600 |
| commit | 1bbb169fe6f91451a2754f0b86301551db76ceba (patch) | |
| tree | 194ecd7090fe39a0f3fe1844a4275795660ef3ff /gcc/tree-vect-loop.cc | |
| parent | 0beeddd6b1b1cb41104c4df925323e8fc0437ba8 (diff) | |
| download | gcc-1bbb169fe6f91451a2754f0b86301551db76ceba.zip gcc-1bbb169fe6f91451a2754f0b86301551db76ceba.tar.gz gcc-1bbb169fe6f91451a2754f0b86301551db76ceba.tar.bz2 | |
rs6000: Change GPR2 to volatile & non-fixed register for function that does not use TOC [PR110320]
Normally, GPR2 is the TOC pointer and is defined as a fixed and non-volatile
register. However, it can be used as volatile for PCREL addressing. Therefore,
modified r2 to be non-fixed in FIXED_REGISTERS and set it to fixed if it is not
PCREL and also when the user explicitly requests TOC or fixed. If the register
r2 is fixed, it is made as non-volatile. Changes in register preservation roles
can be accomplished with the help of available target hooks
(TARGET_CONDITIONAL_REGISTER_USAGE).
2023-12-24 Jeevitha Palanisamy <jeevitha@linux.ibm.com>
gcc/
PR target/110320
* config/rs6000/rs6000.cc (rs6000_conditional_register_usage): Change
GPR2 to volatile and non-fixed register for PCREL.
* config/rs6000/rs6000.h (FIXED_REGISTERS): Modify GPR2 to not fixed.
gcc/testsuite/
PR target/110320
* gcc.target/powerpc/pr110320-1.c: New testcase.
* gcc.target/powerpc/pr110320-2.c: New testcase.
* gcc.target/powerpc/pr110320-3.c: New testcase.
Co-authored-by: Peter Bergner <bergner@linux.ibm.com>
Diffstat (limited to 'gcc/tree-vect-loop.cc')
0 files changed, 0 insertions, 0 deletions