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Author SHA1 Message Date
Hiroshi Yamauchi ed50e6060b [PGO][PGSO] Enable size optimizations in code gen / target passes for cold code. 
Summary: Split off of D67120.

Reviewers: davidxl

Subscribers: hiraditya, asb, rbar, johnrusso, simoncook, sabuasal, niosHD, jrtc27, MaskRay, zzheng, edward-jones, rogfer01, MartinMosbeck, brucehoult, the_o, PkmX, jocewei, lenary, s.egerton, pzheng, sameer.abuasal, apazos, luismarques, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D71288
 2019-12-13 11:01:19 -08:00
James Molloy aa79b19a3e [SDAG] Use ABI type alignment for constant pools when optimizing for size 
SelectionDAG::getConstantPool will automatically determine an appropriate alignment if one is not specified. It does this by querying the type's preferred alignment. This can end up creating quite a lot of padding when the preferred alignment for vectors is 128.

In optimize-for-size mode, it makes sense to instead query the ABI type alignment which is often smaller and causes less padding.

llvm-svn: 284381
 2016-10-17 12:54:07 +00:00