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6 Commits

Author SHA1 Message Date
Wei Mi 01414bdc2c Reinstall the patch "Use EmitPointerWithAlignment to get alignment information of the pointer used in atomic expr" after fixing PR31620. 
This is to fix PR34347. EmitAtomicExpr now only uses alignment information from
Type, instead of Decl, so when the declaration of an atomic variable is marked
to have the alignment equal as its size, EmitAtomicExpr doesn't know about it and
will generate libcall instead of atomic op. The patch uses EmitPointerWithAlignment
to get the precise alignment information.

Differential Revision: https://reviews.llvm.org/D37310

llvm-svn: 314145
 2017-09-25 19:57:59 +00:00
Daniel Jasper 7af729b3d2 Revert r312830: "Reinstall the patch "Use EmitPointerWithAlignment to get alignment information of the pointer used in atomic expr"." 
This triggers llvm.org/PR31620 in several of our internal builds. I'll
forward reproduction instructions to the original author.

llvm-svn: 312897
 2017-09-11 07:35:01 +00:00
Wei Mi 015a484fe2 Reinstall the patch "Use EmitPointerWithAlignment to get alignment information of the pointer used in atomic expr". 
This is to fix PR34347. EmitAtomicExpr now only uses alignment information from
Type, instead of Decl, so when the declaration of an atomic variable is marked
to have the alignment equal as its size, EmitAtomicExpr doesn't know about it and
will generate libcall instead of atomic op. The patch uses EmitPointerWithAlignment
to get the precise alignment information.

Differential Revision: https://reviews.llvm.org/D37310

llvm-svn: 312830
 2017-09-08 21:58:18 +00:00
Wei Mi 43092c0d00 Delete empty file test/CodeGenCXX/atomic-align.cpp after the revert at rL312805. 
llvm-svn: 312810
 2017-09-08 18:31:21 +00:00
Wei Mi c8c7cfc2bd Revert rL312801 since it generated some calls from libatomic and broke some tests. 
llvm-svn: 312805
 2017-09-08 18:10:13 +00:00
Wei Mi 3420ae489c Use EmitPointerWithAlignment to get alignment information of the pointer used in atomic expr. 
This is to fix PR34347. EmitAtomicExpr now only uses alignment information from
Type, instead of Decl, so when the declaration of an atomic variable is marked
to have the alignment equal as its size, EmitAtomicExpr doesn't know about it and
will generate libcall instead of atomic op. The patch uses EmitPointerWithAlignment
to get the precise alignment information.

Differential Revision: https://reviews.llvm.org/D37310

llvm-svn: 312801
 2017-09-08 17:07:32 +00:00