clang-p2996

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Vedant Kumar dbbdda4d23 [ubsan] Skip null checks if they are constant-folded away

The IR builder can constant-fold null checks if the pointer operand
points to a constant. If the "is-non-null" check is folded away to
"true", don't emit the null check + branch.

Testing: check-clang, check-ubsan.

This slightly reduces the amount of null checks we emit when compiling
X86ISelLowering.cpp. Here are the numbers from patched/unpatched clangs
based on r300371.

  -------------------------------------
  | Setup          | # of null checks |
  -------------------------------------
  | unpatched, -O0 |            25251 |
  | patched, -O0   |            23925 | (-5.3%)
  -------------------------------------

llvm-svn: 300509

2017-04-17 22:26:10 +00:00

clang

[ubsan] Skip null checks if they are constant-folded away

2017-04-17 22:26:10 +00:00

clang-tools-extra

[clang-move] Create ClangMoveActionFactory on stack

2017-04-14 18:12:11 +00:00

compiler-rt

Update suspended threads info to be compatible with darwin

2017-04-17 20:29:38 +00:00

debuginfo-tests

Add additional CHECKs to safestack.c.