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3 Commits

Author SHA1 Message Date
Chen Zheng
d9004dfbab [PowerPC] mapping hardward loop intrinsics to powerpc pseudo 
Map hardware loop intrinsics loop_decrement and set_loop_iteration
to the new PowerPC pseudo instructions, so that the hardware loop
intrinsics will be expanded to normal cmp+branch form or ctrloop
form based on the CTR register usage on MIR level.

Reviewed By: lkail

Differential Revision: https://reviews.llvm.org/D123366
 2022-08-08 21:34:20 -04:00
Chen Zheng
9cfbe7bbfe [PowerPC][ctrloop] handles calls in preheader before MTCTRloop 2022-06-21 01:22:39 -04:00
Chen Zheng
a71fe49bb5 [PowerPC] add a new pass to expand ctr loop pseudos 
This patch implements a new way to generate the CTR loops. Now the
intrinsics inserted in hardware loop pass will be mapped to pseudo
instructions and these pseudo instructions will be expanded to CTR
loop or normal compare+branch loop in this post ISEL pass.

Reviewed By: lkail

Differential Revision: https://reviews.llvm.org/D122125
 2022-06-20 22:57:24 -04:00