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570033ed62
llvm-mirror/lib
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Zequan Wu 570033ed62 Add nomerge function attribute to supress tail merge optimization in simplifyCFG 
We want to add a way to avoid merging identical calls so as to keep the
separate debug-information for those calls. There is also an asan
usecase where having this attribute would be beneficial to avoid
alternative work-arounds.

Here is the link to the feature request:
https://bugs.llvm.org/show_bug.cgi?id=42783.

`nomerge` is different from `noline`. `noinline` prevents function from
inlining at callsites, but `nomerge` prevents multiple identical calls
from being merged into one.

This patch adds `nomerge` to disable the optimization in IR level. A
followup patch will be needed to let backend understands `nomerge` and
avoid tail merge at backend.

Reviewed By: asbirlea, rnk

Differential Revision: https://reviews.llvm.org/D78659
2020-05-12 16:49:20 -07:00
..
Analysis [ValueTracking] Let propagatesPoison support binops/unaryops/cast/etc. 2020-05-13 02:51:42 +09:00
AsmParser Add nomerge function attribute to supress tail merge optimization in simplifyCFG 2020-05-12 16:49:20 -07:00
BinaryFormat XCOFF.h - replace StringRef.h include with forward declaration. NFC. 2020-04-23 13:52:48 +01:00
Bitcode Add nomerge function attribute to supress tail merge optimization in simplifyCFG 2020-05-12 16:49:20 -07:00
Bitstream [Bitcode] reserve in front of push_back loops. NFCI. 2020-05-01 15:52:53 +02:00
CodeGen [TargetLoweringObjectFileImpl] Produce .text.hot. instead of .text.hot for -fno-unique-section-names 2020-05-12 14:14:17 -07:00
DebugInfo [DWARF5]: Added support for dumping strx forms in llvm-dwarfdump 2020-05-12 10:29:18 +05:30
Demangle
DWARFLinker Reland D79501 "[DebugInfo] Fix handling DW_OP_call_ref in DWARF64 units." 2020-05-08 09:35:54 -07:00
ExecutionEngine [ORC] Share ownership of JITDylibs between ExecutionSession and 2020-05-10 16:37:17 -07:00
Extensions Update compiler extension integration into the build system 2020-04-24 09:40:14 +02:00
Frontend [cmake] LLVMFrontendOpenMP - fix include/llvm/Frontend/OpenMP header path 2020-04-18 12:31:39 +01:00
Fuzzer
FuzzMutate FuzzerCLI.h - reduce StringRef.h include to forward declaration. NFC. 2020-05-12 13:03:50 +01:00
IR Add nomerge function attribute to supress tail merge optimization in simplifyCFG 2020-05-12 16:49:20 -07:00
IRReader
LineEditor
Linker [SVE] Add new VectorType subclasses 2020-04-22 08:59:01 -07:00
LTO [LTO] Suppress emission of empty combined module by default 2020-05-04 18:31:09 -07:00
MC [XCOFF][AIX] Emit correct alignment for csect 2020-05-11 19:43:10 +00:00
MCA [MCA][InstrBuilder] Correctly mark reserved resources in initializeUsedResources. 2020-05-10 19:25:54 +01:00
Object [Object] Remove unused variable after D79560. NFC. 2020-05-11 13:03:53 +08:00
ObjectYAML [PDB] Remove unique_ptr wrapper around C13 line table subsections 2020-05-02 16:35:07 -07:00
Option
Passes [PassBuilder] Moved ProfileSummaryAnalysis in buildInlinerPipeline. 2020-05-12 16:00:40 +00:00
ProfileData [gcov] Emit GCOV_TAG_OBJECT_SUMMARY/GCOV_TAG_PROGRAM_SUMMARY correctly and fix llvm-cov's decoding of runcount 2020-05-11 21:53:53 -07:00
Remarks RemarkStringTable.h - reduce StringRef/Remark includes to forward declarations. NFC 2020-05-08 12:30:49 +01:00
Support [YAMLVFSWriter] Fix for delimiters 2020-05-12 15:43:10 -07:00
TableGen [TableGen] Simplify with TGParser::consume() 2020-04-26 15:26:49 -07:00
Target [AMDGPU] Make v4i64/v4f64/v8i64/v8f64 legal 2020-05-12 16:05:12 -07:00
Testing
TextAPI [cmake] Add headers in TextAPI/Elf and TextAPI/MachO subdirectories 2020-04-24 18:42:44 +01:00
ToolDrivers [COFF] Use Expected in COFFObjectFile creation 2020-05-08 14:22:28 -07:00
Transforms Add nomerge function attribute to supress tail merge optimization in simplifyCFG 2020-05-12 16:49:20 -07:00
WindowsManifest
XRay [Object] Change ObjectFile::getSymbolValue() return type to Expected<uint64_t> 2020-05-02 14:04:44 +08:00
CMakeLists.txt Update compiler extension integration into the build system 2020-04-24 09:40:14 +02:00
LLVMBuild.txt Update compiler extension integration into the build system 2020-04-24 09:40:14 +02:00