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llvm-project/llvm/test/Transforms/GlobalOpt
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Vedant Kumar b7cd291c15 [GlobalOpt] Treat null-check of loaded value as use of global (PR35760) 
PR35760 shows an example program which, when compiled with `clang -O0`
or gcc at any optimization level, prints '0'. However, llvm transforms
the program in a way that causes it to print '1'.

Fix the issue by having `AllUsesOfValueWillTrapIfNull` return false when
analyzing a load from a global which is used by an `icmp`. This special
case was untested [0] so this is just deleting dead code.

An alternative fix might be to change the GlobalStatus analysis for the
global to report "Stored" instead of "StoredOnce". However, "StoredOnce"
is appropriate when only one value other than the initializer is stored
to the global.

[0]
http://lab.llvm.org:8080/coverage/coverage-reports/coverage/Users/buildslave/jenkins/workspace/coverage/llvm-project/llvm/lib/Transforms/IPO/GlobalOpt.cpp.html#L662

Differential Revision: https://reviews.llvm.org/D76645
 		2020-03-23 22:36:09 -07:00
..
PowerPC [lit] Delete empty lines at the end of lit.local.cfg NFC 2019-06-17 09:51:07 +00:00
2004-10-10-CastStoreOnce.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2005-06-15-LocalizeConstExprCrash.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2005-09-27-Crash.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2006-07-07-InlineAsmCrash.ll [IR] Disallow llvm.global_ctors and llvm.global_dtors of the 2-field form in textual format 2019-05-15 02:35:32 +00:00
2006-11-01-ShrinkGlobalPhiCrash.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2007-04-05-Crash.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2007-05-13-Crash.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2007-06-04-PackedStruct.ll [IR] Disallow llvm.global_ctors and llvm.global_dtors of the 2-field form in textual format 2019-05-15 02:35:32 +00:00
2007-11-09-GEP-GEP-Crash.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2008-01-03-Crash.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2008-01-13-OutOfRangeSROA.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2008-01-29-VolatileGlobal.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2008-04-26-SROA-Global-Align.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2008-07-17-addrspace.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2008-12-16-HeapSRACrash-2.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2008-12-16-HeapSRACrash.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2009-01-13-phi-user.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2009-02-15-BitcastAlias.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2009-02-15-ResolveAlias.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2009-03-05-dbg.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2009-03-06-Anonymous.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2009-03-07-PromotePtrToBool.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2009-06-01-RecursivePHI.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2009-11-16-BrokenPerformHeapAllocSRoA.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2009-11-16-MallocSingleStoreToGlobalVar.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2010-02-25-MallocPromote.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2010-02-26-MallocSROA.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
2010-10-19-WeakOdr.ll [IR] Disallow llvm.global_ctors and llvm.global_dtors of the 2-field form in textual format 2019-05-15 02:35:32 +00:00
2011-04-09-EmptyGlobalCtors.ll [IR] Disallow llvm.global_ctors and llvm.global_dtors of the 2-field form in textual format 2019-05-15 02:35:32 +00:00
2012-05-11-blockaddress.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
GSROA-section.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
MallocSROA-section-no-null-opt.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
MallocSROA-section.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
SROA-section.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
alias-resolve.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
alias-used-address-space.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
alias-used-section.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
alias-used.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
amdgcn-ctor-alloca.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
array-elem-refs.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
assume.ll [IR] Disallow llvm.global_ctors and llvm.global_dtors of the 2-field form in textual format 2019-05-15 02:35:32 +00:00
atexit.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
atomic.ll remove UB from test by making GV alignment explicit 2019-12-01 15:16:31 +00:00
available_externally_global_ctors.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
basictest.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
blockaddress.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
cleanup-pointer-root-users.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
coldcc_stress_test.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
compiler-used.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
constantexpr-dangle.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
constantfold-initializers.ll [IR] Disallow llvm.global_ctors and llvm.global_dtors of the 2-field form in textual format 2019-05-15 02:35:32 +00:00
crash-2.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
crash.ll [IR] Disallow llvm.global_ctors and llvm.global_dtors of the 2-field form in textual format 2019-05-15 02:35:32 +00:00
ctor-list-opt-constexpr.ll [IR] Disallow llvm.global_ctors and llvm.global_dtors of the 2-field form in textual format 2019-05-15 02:35:32 +00:00
ctor-list-opt-inbounds.ll [IR] Disallow llvm.global_ctors and llvm.global_dtors of the 2-field form in textual format 2019-05-15 02:35:32 +00:00
ctor-list-opt.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
cxx-dtor.ll [IR] Disallow llvm.global_ctors and llvm.global_dtors of the 2-field form in textual format 2019-05-15 02:35:32 +00:00
deaddeclaration.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
deadfunction.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
deadglobal-2.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
deadglobal.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
evaluate-bitcast-2.ll [Evaluator] Walk initial elements when handling load through bitcast 2019-04-25 17:00:01 +00:00
evaluate-bitcast-3.ll [Evaluator] Walk initial elements when handling load through bitcast 2019-04-25 17:00:01 +00:00
evaluate-bitcast.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
evaluate-call-errors.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
evaluate-call.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
evaluate-constfold-call.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
externally-initialized-aggregate.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
externally-initialized-global-ctr.ll [IR] Disallow llvm.global_ctors and llvm.global_dtors of the 2-field form in textual format 2019-05-15 02:35:32 +00:00
externally-initialized.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
fastcc.ll remove inalloca parameters in globalopt and simplify argpromotion 2019-05-02 00:37:36 +00:00
global-demotion.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
globalsra-multigep.ll Revert r361460 2019-05-24 01:03:51 +00:00
globalsra-partial.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
globalsra-unknown-index.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
globalsra.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
heap-sra-1-no-null-opt.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
heap-sra-1.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
heap-sra-2-no-null-opt.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
heap-sra-2.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
heap-sra-3-no-null-opt.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
heap-sra-3.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
heap-sra-4-no-null-opt.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
heap-sra-4.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
heap-sra-phi-no-null-opt.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
heap-sra-phi.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
int_sideeffect.ll [IR] Disallow llvm.global_ctors and llvm.global_dtors of the 2-field form in textual format 2019-05-15 02:35:32 +00:00
integer-bool-dwarf.ll [DebugInfo] GlobalOpt DW_OP_deref_size instead of DW_OP_deref. 2019-05-06 07:20:56 +00:00
integer-bool.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
invariant-nodatalayout.ll [IR] Disallow llvm.global_ctors and llvm.global_dtors of the 2-field form in textual format 2019-05-15 02:35:32 +00:00
invariant.group.ll [IR] Disallow llvm.global_ctors and llvm.global_dtors of the 2-field form in textual format 2019-05-15 02:35:32 +00:00
invariant.ll [IR] Disallow llvm.global_ctors and llvm.global_dtors of the 2-field form in textual format 2019-05-15 02:35:32 +00:00
invoke.ll [IR] Disallow llvm.global_ctors and llvm.global_dtors of the 2-field form in textual format 2019-05-15 02:35:32 +00:00
iterate.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
large-int-crash.ll [GlobalOpt] prevent crashing on large integer types (PR42932) 2019-08-09 12:43:25 +00:00
load-store-global-no-null-opt.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
load-store-global.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
localize-constexpr-debuginfo.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
localize-constexpr.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
long-compilation-global-sra.ll [Transforms][GlobalSRA] huge array causes long compilation time and huge memory usage. 2020-01-04 16:42:38 +03:00
malloc-promote-1-no-null-opt.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
malloc-promote-1.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
malloc-promote-2-no-null-opt.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
malloc-promote-2.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
malloc-promote-3.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
memcpy.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
memset-null.ll [IR] Disallow llvm.global_ctors and llvm.global_dtors of the 2-field form in textual format 2019-05-15 02:35:32 +00:00
memset.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
metadata.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
musttail_cc.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
naked_functions.ll IR: print value numbers for unnamed function arguments 2019-08-03 14:28:34 +00:00
null-check-is-use-pr35760.ll [GlobalOpt] Treat null-check of loaded value as use of global (PR35760) 2020-03-23 22:36:09 -07:00
phi-select.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
pr21191.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
pr33686.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
preserve-comdats.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
shrink-address-to-bool.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
shrink-global-to-bool-check-debug.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
static-const-bitcast.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
storepointer-compare-no-null-opt.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
storepointer-compare.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
storepointer-no-null-opt.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
storepointer.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
tls.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
trivialstore.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
undef-init.ll [IR] Disallow llvm.global_ctors and llvm.global_dtors of the 2-field form in textual format 2019-05-15 02:35:32 +00:00
unnamed-addr.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00
zeroinitializer-gep-load.ll Revert "Temporarily Revert "Add basic loop fusion pass."" 2019-04-17 04:52:47 +00:00