Commit Graph

4 Commits

Author SHA1 Message Date
Xin Tong 5ee40ba400 Improve what can be promoted in LICM.
Summary:
In case of non-alloca pointers, we check for whether it is a pointer
from malloc-like calls and it is not captured. In such case, we can
promote the pointer, as the caller will have no way to access this pointer
even if there is unwinding in middle of the loop.

Reviewers: hfinkel, sanjoy, reames, eli.friedman

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D28834

llvm-svn: 292510
2017-01-19 19:31:40 +00:00
Xin Tong 58e8142f0e 2 returns next to each other =). NFC
llvm-svn: 292315
2017-01-18 00:26:17 +00:00
Xin Tong 0bc2977874 Add a test case for LICM when promoting locals that may be read after the throw within the loop. NFCI.
Summary: Add a test case for LICM when promoting locals that may be read after the throw within the loop.

Reviewers: eli.friedman, hfinkel, sanjoy

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D28822

llvm-svn: 292261
2017-01-17 21:26:36 +00:00
Xin Tong 8343b5096d Rename scalar_promote.ll to scalar-promote.ll and scalar_promote-unwind.ll to scalar-promote-unwind.ll. NFCI
llvm-svn: 292251
2017-01-17 20:28:36 +00:00