Vedant Kumar a9b43731f7 [Debugify] Move debug value intrinsics closer to their operand defs ... Before this patch, debugify would insert debug value intrinsics before the terminating instruction in a block. This had the advantage of being simple, but was a bit too simple/unrealistic. This patch teaches debugify to insert debug values immediately after their operand defs. This enables better testing of the compiler. For example, with this patch, `opt -debugify-each` is able to identify a vectorizer DI-invariance bug fixed in llvm.org/PR32761. In this bug, the vectorizer produced different output with/without debug info present. Reverting Davide's bugfix locally, I see: $ ~/scripts/opt-check-dbg-invar.sh ./bin/opt \ .../SLPVectorizer/AArch64/spillcost-di.ll -slp-vectorizer Comparing: -slp-vectorizer .../SLPVectorizer/AArch64/spillcost-di.ll Baseline: /var/folders/j8/t4w0bp8j6x1g6fpghkcb4sjm0000gp/T/tmp.iYYeL1kf With DI : /var/folders/j8/t4w0bp8j6x1g6fpghkcb4sjm0000gp/T/tmp.sQtQSeet 9,11c9,11 < %5 = getelementptr inbounds %0, %0* %2, i64 %0, i32 1 < %6 = bitcast i64* %4 to <2 x i64>* < %7 = load <2 x i64>, <2 x i64>* %6, align 8, !tbaa !0 --- > %5 = load i64, i64* %4, align 8, !tbaa !0 > %6 = getelementptr inbounds %0, %0* %2, i64 %0, i32 1 > %7 = load i64, i64* %6, align 8, !tbaa !5 12a13 > store i64 %5, i64* %8, align 8, !tbaa !0 14,15c15 < %10 = bitcast i64* %8 to <2 x i64>* < store <2 x i64> %7, <2 x i64>* %10, align 8, !tbaa !0 --- > store i64 %7, i64* %9, align 8, !tbaa !5 :: Found a test case ^ Running this over the *.ll files in tree, I found four additional examples which compile differently with/without DI present. I plan on filing bugs for these. llvm-svn: 334118		2018-06-06 19:05:42 +00:00
..
AnalysisWrappers.cpp
BreakpointPrinter.cpp	Remove \brief commands from doxygen comments.	2018-05-01 15:54:18 +00:00
BreakpointPrinter.h	Remove \brief commands from doxygen comments.	2018-05-01 15:54:18 +00:00
CMakeLists.txt	Another try to commit 323321 (aggressive instruction combine).	2018-01-25 12:06:32 +00:00
Debugify.cpp	[Debugify] Move debug value intrinsics closer to their operand defs	2018-06-06 19:05:42 +00:00
GraphPrinters.cpp
LLVMBuild.txt
NewPMDriver.cpp	IWYU for llvm-config.h in llvm, additions.	2018-04-30 14:59:11 +00:00
NewPMDriver.h	Remove \brief commands from doxygen comments.	2018-05-01 15:54:18 +00:00
opt.cpp	[opt] Introduce -strip-named-metadata	2018-06-05 00:56:08 +00:00
PassPrinters.cpp	Remove \brief commands from doxygen comments.	2018-05-01 15:54:18 +00:00
PassPrinters.h	[Debugfiy] Print the pass name next to the result	2018-05-15 23:38:05 +00:00
PrintSCC.cpp