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2012-12-21Don't eagerly emit a global static merged with a local extern.Rafael Espindola
When we are visiting the extern declaration of 'i' in static int i = 99; int foo() { extern int i; return i; } We should not try to handle it as if it was an function static. That is, we must consider the written storage class. Fixing this then exposes that the assert in EmitGlobalVarDeclLValue and the if leading to its call are not completely accurate. They were passing before because the second decl was marked as having external storage. I changed them to check the linkage, which I find easier to understand. Last but not least, there is something strange going on with cuda and opencl. My guess is that the linkage computation for these languages needs to be audited, but I didn't want to change that in this patch so I just updated the storage classes to keep the current behavior. Thanks to Reed Kotler for reporting this. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170827 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-20Rename llvm::Attributes to llvm::Attribute.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170722 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-20Revert r170500. It over-zealously converted *ALL* things named Attributes, ↵Bill Wendling
which is wrong here. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170721 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-19Rename the 'Attributes' class to 'Attribute'. It's going to represent a ↵Bill Wendling
single attribute in the future. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170500 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-19Make sure CodeGen uses a value of the correct type as the result ofEli Friedman
of assignment to a bool bitfield. PR14638. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170480 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-18Similar to 170440 - fix build warning with gccEli Bendersky
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170461 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-18Fix typo (thanks to Jordan for spotting it!).Richard Smith
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170403 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-18Rein ubsan's vptr sanitizer back a bit. Per core issue 453, binding a referenceRichard Smith
to an object outside its lifetime does not have undefined behavior. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170387 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-15[ubsan] Emit branch weight metadata to hint towards common case.Will Dietz
Results in better block placement that helps close the performance gap when making ubsan checks recoverable. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170263 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-13ubsan: Add -fsanitize=bool and -fsanitize=enum, which check for loads ofRichard Smith
bit-patterns which are not valid values for enumerated or boolean types. These checks are the ubsan analogue of !range metadata. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170108 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-13Simplify. No functionality change.Richard Smith
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170100 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-07Fix the required args count for variadic blocks.John McCall
We were emitting calls to blocks as if all arguments were required --- i.e. with signature (A,B,C,D,...) rather than (A,B,...). This patch fixes that and accounts for the implicit block-context argument as a required argument. In addition, this patch changes the function type under which we call unprototyped functions on platforms like x86-64 that guarantee compatibility of variadic functions with unprototyped function types; previously we would always call such functions under the LLVM type T (...)*, but now we will call them under the type T (A,B,C,D,...)*. This last change should have no material effect except for making the type conventions more explicit; it was a side-effect of the most convenient implementation. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169588 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-06Rework the bitfield access IR generation to address PR13619 andChandler Carruth
generally support the C++11 memory model requirements for bitfield accesses by relying more heavily on LLVM's memory model. The primary change this introduces is to move from a manually aligned and strided access pattern across the bits of the bitfield to a much simpler lump access of all bits in the bitfield followed by math to extract the bits relevant for the particular field. This simplifies the code significantly, but relies on LLVM to intelligently lowering these integers. I have tested LLVM's lowering both synthetically and in benchmarks. The lowering appears to be functional, and there are no really significant performance regressions. Different code patterns accessing bitfields will vary in how this impacts them. The only real regressions I'm seeing are a few patterns where the LLVM code generation for loads that feed directly into a mask operation don't take advantage of the x86 ability to do a smaller load and a cheap zero-extension. This doesn't regress any benchmark in the nightly test suite on my box past the noise threshold, but my box is quite noisy. I'll be watching the LNT numbers, and will look into further improvements to the LLVM lowering as needed. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169489 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-04Sort all of Clang's files under 'lib', and fix up the broken headersChandler Carruth
uncovered. This required manually correcting all of the incorrect main-module headers I could find, and running the new llvm/utils/sort_includes.py script over the files. I also manually added quite a few missing headers that were uncovered by shuffling the order or moving headers up to be main-module-headers. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169237 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-03Fix test failure when building Clang with g++4.7 -- don't use a Twine temporaryRichard Smith
after its lifetime has ended! git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169170 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-02[ubsan] Add flag to enable recovery from checks when possible.Will Dietz
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169114 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-30Fixing a precedence issue with my previous commit.Aaron Ballman
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169041 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-30Fixing an MSVC warning about an unsafe mixture of Boolean and unsigned types ↵Aaron Ballman
in a logical operator. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169037 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-27objective-C arc: load of a __weak object happens via call toFariborz Jahanian
objc_loadWeak. This retains and autorelease the weakly-refereced object. This hidden autorelease sometimes makes __weak variable alive even after the weak reference is erased, because the object is still referenced by an autorelease pool. This patch overcomes this behavior by loading a weak object via call to objc_loadWeakRetained(), followng it by objc_release at appropriate place, thereby removing the hidden autorelease. // rdar://10849570 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@168740 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-17Enable inlining of 4 byte atomic ops on ppc32, 8 byte atomic ops on ppc64.Benjamin Kramer
Also fixes a bit/byte mismatch when checking if a target supports atomic ops of a certain size. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@168260 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-13Fix IR generation for bool on PPC (and any other target where bool is not 8 ↵Eli Friedman
bits in memory). PR11777. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167802 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-05Use the individual -fsanitize=<...> arguments to control which of the UBSanRichard Smith
checks to enable. Remove frontend support for -fcatch-undefined-behavior, -faddress-sanitizer and -fthread-sanitizer now that they don't do anything. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167413 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-01Simplify: replace getContext().getLangOpts() with just getLangOpts().Richard Smith
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167261 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-01Split emission of -ftrapv checks and -fcatch-undefined-behavior checks intoRichard Smith
separate functions, since they share essentially no code. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167259 91177308-0d34-0410-b5e6-96231b3b80d8
2012-11-01-fcatch-undefined-behavior: Start checking loads and stores for null pointers.Richard Smith
We want the diagnostic, and if the load is optimized away, we still want to trap it. Stop checking non-default address spaces; that doesn't work in general. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@167219 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-30Don't crash on bad atomic operations. PR14176.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166992 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-27Move two helper functions to AST so that sema can use them.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166853 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-27Refactor some code into a new findMaterializedTemporary function.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166849 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-27Refactor some code into a new skipRValueSubobjectAdjustments function.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166848 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-27Delay codegen to after collecting all SubobjectAdjustment so that the collectionRafael Espindola
can be refactored and used in Sema. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166847 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-25-fcatch-undefined-behavior checking for appropriate vptr value: Clang ↵Richard Smith
CodeGen side. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166661 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-20DR1472: A reference isn't odr-used if it has preceding initialization,Richard Smith
initialized by a reference constant expression. Our odr-use modeling still needs work here: we don't yet implement the 'set of potential results of an expression' DR. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166361 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-15Move the Attributes::Builder outside of the Attributes class and into its ↵Bill Wendling
own class named AttrBuilder. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165961 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-15Attributes RewriteBill Wendling
Convert the uses of the Attributes class over to the new format. The Attributes::get method call now takes an LLVM context so that the attributes object can be uniquified and stored. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165918 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-11Add codegen support for __uuidof().Nico Weber
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165710 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-10Remove the final bits of Attributes being declared in the AttributeBill Wendling
namespace. Use the attribute's enum value instead. No functionality change intended. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165611 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-09-fcatch-undefined-behavior: store the type name directly at the end of a ↵Richard Smith
type descriptor. 5% binary size reduction due to fewer relocations. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165572 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-09-fcatch-undefined-behavior: emit calls to the runtime library whenever one ↵Richard Smith
of the checks fails. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165536 91177308-0d34-0410-b5e6-96231b3b80d8
2012-10-08Move TargetData to DataLayout.Micah Villmow
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165395 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-08When a bad UTF-8 encoding or bogus escape sequence is encountered in aRichard Smith
string literal, produce a diagnostic pointing at the erroneous character range, not at the start of the literal. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@163459 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-08-fcatch-undefined-behavior: Factor emission of the creation of, and branch to,Richard Smith
the trap BB out of the individual checks and into a common function, to prepare for making this code call into a runtime library. Rename the existing EmitCheck to EmitTypeCheck to clarify it and to move it out of the way of the new EmitCheck. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@163451 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-31Change the representation of builtin functions in the ASTEli Friedman
(__builtin_* etc.) so that it isn't possible to take their address. Specifically, introduce a new type to represent a reference to a builtin function, and a new cast kind to convert it to a function pointer in the operand of a call. Fixes PR13195. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162962 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-24New -fcatch-undefined-behavior features:Richard Smith
* when checking that a pointer or reference refers to appropriate storage for a type, also check the alignment and perform a null check * check that references are bound to appropriate storage * check that 'this' has appropriate storage in member accesses and member function calls git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162523 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-16Convert loads and stores of vec3 to vec4 to achieve better code generation. ↵Tanya Lattner
Add test case. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@162002 91177308-0d34-0410-b5e6-96231b3b80d8
2012-08-08Fix an assertion failure with a C++ constructor initializing aEli Friedman
member of reference type in an anonymous struct. PR13154. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161473 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-15Update Clang to reflect the move of MDBuilder in r160237.Chandler Carruth
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160238 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-07Distinguish more carefully between free functions and C++ instance methodsJohn McCall
in the ABI arrangement, and leave a hook behind so that we can easily tweak CCs on platforms that use different CCs by default for C++ instance methods. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159894 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-03Silence warning in -Asserts buildMatt Beaumont-Gay
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159635 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-03Share ConvertUTF8toWide() between Lex and CodeGen.Nico Weber
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159634 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-02Significantly simplify CGExprAgg's logic about ignored results:John McCall
if we want to ignore a result, the Dest will be null. Otherwise, we must copy into it. This means we need to ensure a slot when loading from a volatile l-value. With all that in place, fix a bug with chained assignments into __block variables of aggregate type where we were losing insight into the actual source of the value during the second assignment. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159630 91177308-0d34-0410-b5e6-96231b3b80d8
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