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Bjorn Pettersson 428caf988b Re-apply "[DebugInfo] Check size of variable in ConvertDebugDeclareToDebugValue" 
This is r334704 (which was reverted in r334732) with a fix for
types like x86_fp80. We need to use getTypeAllocSizeInBits and
not getTypeStoreSizeInBits to avoid dropping debug info for
such types.

Original commit msg:
> Summary:
> Do not convert a DbgDeclare to DbgValue if the store
> instruction only refer to a fragment of the variable
> described by the DbgDeclare.
>
> Problem was seen when for example having an alloca for an
> array or struct, and there were stores to individual elements.
> In the past we inserted a DbgValue intrinsics for each store,
> just as if the store wrote the whole variable.
>
> When handling store instructions we insert a DbgValue that
> indicates that the variable is "undefined", as we do not know
> which part of the variable that is updated by the store.
>
> When ConvertDebugDeclareToDebugValue is used with a load/phi
> instruction we assert that the referenced value is large enough
> to cover the whole variable. Afaict this should be true for all
> scenarios where those methods are used on trunk. If the assert
> blows in the future I guess we could simply skip to insert a
> dbg.value instruction.
>
> In the future I think we should examine which part of the variable
> that is accessed, and add a DbgValue instrinsic with an appropriate
> DW_OP_LLVM_fragment expression.
>
> Reviewers: dblaikie, aprantl, rnk
>
> Reviewed By: aprantl
>
> Subscribers: JDevlieghere, llvm-commits
>
> Tags: #debug-info
>
> Differential Revision: https://reviews.llvm.org/D48024

llvm-svn: 334830
 		2018-06-15 13:48:55 +00:00
clang [AArch64] Reverted rC334696 with Clang VCVTA test fix 2018-06-15 10:10:45 +00:00
clang-tools-extra [clang-tidy] This patch is a fix for D45405 where spaces were mistakenly considered as a part of a type name. So length("int *") was 5 instead of 3 with RemoveStars=0 or 4 with RemoveStars=1 2018-06-15 13:35:40 +00:00
compiler-rt [compiler-rt] [builtins] Don't build __atomic_* by default. 2018-06-14 23:22:53 +00:00
debuginfo-tests [debuginfo-tests] Always use the system python to invoke llgdb.py. 2018-06-10 19:38:26 +00:00
libclc r600/fmin: Flush denormals before calling builtin. 2018-06-07 20:27:58 +00:00
libcxx [libcxx] [test] Strip trailing whitespace. NFC. 2018-06-14 00:12:20 +00:00
libcxxabi private_typeinfo: limit is_dst_type_derived_from_static_type optimization 2018-05-18 20:51:38 +00:00
libunwind [OR1K] Add the EPCR special-purpose register to register state. 2018-05-16 19:09:48 +00:00
lld Fix wasm responsefile lld test on Windows 2018-06-14 19:59:22 +00:00
lldb Add support for PLATFORM_*SIMULATOR 2018-06-15 02:50:45 +00:00
llgo irgen: Create functions instead of global variables for builtin hash and equal algorithms. 2017-06-04 22:11:28 +00:00
llvm Re-apply "[DebugInfo] Check size of variable in ConvertDebugDeclareToDebugValue" 2018-06-15 13:48:55 +00:00
openmp [OpenMP] Fix formatting issues in kmp_stats.h 2018-06-08 22:27:53 +00:00
parallel-libs [Axccel] Remove -Wno-missing-braces in build 2016-12-19 21:34:07 +00:00
polly Simplify the implementation of getCUDALibDeviceFunction. NFC. 2018-06-14 08:54:55 +00:00
README.md Add an svn project to contain the files that appear at the root of the 2017-10-19 21:09:49 +00:00

README.md

Low Level Virtual Machine (LLVM)

This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.