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Nico Weber 2c45043415 lld/elf: Deduplicate undefined symbol diagnostics 
Before:

```
ld.lld: error: undefined symbol: f()
>>> referenced by test.cc:3
>>>               /var/folders/c5/8d7sdn1x2mg92mj0rndghhdr0000gn/T/test-9c0808.o:(g())

ld.lld: error: undefined symbol: f()
>>> referenced by test.cc:4
>>>               /var/folders/c5/8d7sdn1x2mg92mj0rndghhdr0000gn/T/test-9c0808.o:(h())

ld.lld: error: undefined symbol: f()
>>> referenced by test.cc:5
>>>               /var/folders/c5/8d7sdn1x2mg92mj0rndghhdr0000gn/T/test-9c0808.o:(j())

ld.lld: error: undefined symbol: k()
>>> referenced by test.cc:5
>>>               /var/folders/c5/8d7sdn1x2mg92mj0rndghhdr0000gn/T/test-9c0808.o:(j())

ld.lld: error: undefined symbol: f()
>>> referenced by test2.cc:2
>>>               /var/folders/c5/8d7sdn1x2mg92mj0rndghhdr0000gn/T/test2-07b391.o:(asdf())
clang: error: linker command failed with exit code 1 (use -v to see invocation)
```

Now:

```
ld.lld: error: undefined symbol: f()
>>> referenced by test.cc:3
>>>               /var/folders/c5/8d7sdn1x2mg92mj0rndghhdr0000gn/T/test-0e07ba.o:(g())
>>> referenced by test.cc:4
>>>               /var/folders/c5/8d7sdn1x2mg92mj0rndghhdr0000gn/T/test-0e07ba.o:(h())
>>> referenced by test.cc:5
>>>               /var/folders/c5/8d7sdn1x2mg92mj0rndghhdr0000gn/T/test-0e07ba.o:(j())
>>> referenced by test2.cc:2
>>>               /var/folders/c5/8d7sdn1x2mg92mj0rndghhdr0000gn/T/test2-6bdb24.o:(asdf())

ld.lld: error: undefined symbol: k()
>>> referenced by test.cc:5
>>>               /var/folders/c5/8d7sdn1x2mg92mj0rndghhdr0000gn/T/test-0e07ba.o:(j())
clang: error: linker command failed with exit code 1 (use -v to see invocation)
```

If there are more than 10 references to an undefined symbol, only the
first 10 are printed.

Fixes PR42260.

Differential Revision: https://reviews.llvm.org/D63344

llvm-svn: 363962
 		2019-06-20 18:25:57 +00:00
clang [X86] Make _mm_mask_cvtps_ph, _mm_maskz_cvtps_ph, _mm256_mask_cvtps_ph, and _mm256_maskz_cvtps_ph aliases for their corresponding cvt_roundps_ph intrinsic. 2019-06-20 18:24:29 +00:00
clang-tools-extra [clangd] Include the diagnostics's code when comparing diagnostics 2019-06-19 23:11:02 +00:00
compiler-rt [libFuzzer] ensure that DFT and autofocus works for C++ (mangled) functions 2019-06-20 01:48:45 +00:00
debuginfo-tests Store a pointer to the return value in a static alloca and let the debugger use that 2019-06-20 17:15:21 +00:00
libclc travis: Add LLVM-8 build 2019-03-27 21:28:31 +00:00
libcxx AIX system headers need stdint.h and inttypes.h to be re-enterable 2019-06-20 15:36:32 +00:00
libcxxabi [demangle] Special case clang's creative mangling of __uuidof expressions. 2019-06-18 23:34:09 +00:00
libunwind [libunwind][AArch64] Fix libunwind::Registers_arm64::jumpto 2019-06-17 11:00:21 +00:00
lld lld/elf: Deduplicate undefined symbol diagnostics 2019-06-20 18:25:57 +00:00
lldb [unittests] Use object library if cmake supports it 2019-06-20 15:06:31 +00:00
llgo IR: Support parsing numeric block ids, and emit them in textual output. 2019-03-22 18:27:13 +00:00
llvm gn build: Merge r363948 2019-06-20 18:18:40 +00:00
openmp [OpenMP][libomptarget] Add support for declare target to clause under unified memory 2019-06-19 15:48:10 +00:00
parallel-libs Fix typos throughout the license files that somehow I and my reviewers 2019-01-21 09:52:34 +00:00
polly [test] Add wrap flags after D61934. 2019-06-17 19:17:07 +00:00
pstl [pstl] Default to the serial backend when unspecified 2019-06-20 17:56:51 +00:00
.arcconfig Update monorepo .arcconfig with new project callsign. 2019-01-31 14:34:59 +00:00
.clang-format Add .clang-tidy and .clang-format files to the toplevel of the 2019-01-29 16:43:16 +00:00
.clang-tidy Disable tidy checks with too many hits 2019-02-01 11:20:13 +00:00
.gitignore Add a reduced copy of the llvm .gitignore 2019-04-09 00:52:49 +00:00
README.md
…

README.md

The LLVM Compiler Infrastructure

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