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Author SHA1 Message Date
Peter Collingbourne 396943a75b Re-apply r309622 with a fix for MSVC. 
Patch by Vlad Tsyrklevich!

llvm-svn: 309635
 2017-07-31 22:35:33 +00:00
Peter Collingbourne ab65b0dba1 Revert r309622, "Fix logic for generating llvm.type.test()s" 
Caused a bot test failure:
http://bb.pgr.jp/builders/test-clang-msc-x64-on-i686-linux-RA/builds/5325

llvm-svn: 309624
 2017-07-31 20:53:16 +00:00
Peter Collingbourne 8867b216dc Fix logic for generating llvm.type.test()s 
CodeGenFunction::EmitTypeMetadataCodeForVCall() could output an
llvm.assume(llvm.type.test())when CFI was enabled, optimizing out the
vcall check. This case was only reached when: 1) CFI-vcall was enabled,
2) -fwhole-program-tables was specified, and 3)
-fno-sanitize-trap=cfi-vcall was specified.

Patch by Vlad Tsyrklevich!

Differential Revision: https://reviews.llvm.org/D36013

llvm-svn: 309622
 2017-07-31 20:45:14 +00:00