Rollback to older compiler-rt to fix 10.6.8 issues #5
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brson
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Mar 28, 2013
std::string to a StringRef. Moreover, the method being called accepts
a Twine to simplify these patterns.
Fixes this ASan failure:
==6312== ERROR: AddressSanitizer: heap-use-after-free on address 0x7fd558b1af58 at pc 0xcb7529 bp 0x7fffff572080 sp 0x7fffff572078
READ of size 1 at 0x7fd558b1af58 thread T0
#0 0xcb7528 .../llvm/include/llvm/ADT/StringRef.h:192 llvm::StringRef::operator[]()
#1 0x1d53c0a .../llvm/include/llvm/ADT/StringExtras.h:128 llvm::HashString()
#2 0x1d53878 .../llvm/lib/Support/StringMap.cpp:64 llvm::StringMapImpl::LookupBucketFor()
#3 0x1b6872f .../llvm/include/llvm/ADT/StringMap.h:352 llvm::StringMap<>::GetOrCreateValue<>()
#4 0x1b61836 .../llvm/lib/MC/MCContext.cpp:109 llvm::MCContext::GetOrCreateSymbol()
#5 0xe9fd47 .../llvm/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp:154 (anonymous namespace)::ARMELFStreamer::EmitMappingSymbol()
#6 0xea01dd .../llvm/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp:133 (anonymous namespace)::ARMELFStreamer::EmitDataMappingSymbol()
#7 0xe9f78b .../llvm/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp:91 (anonymous namespace)::ARMELFStreamer::EmitBytes()
#8 0x1b15d82 .../llvm/lib/MC/MCStreamer.cpp:89 llvm::MCStreamer::EmitIntValue()
#9 0xcc0f9b .../llvm/lib/Target/ARM/ARMAsmPrinter.cpp:713 llvm::ARMAsmPrinter::emitAttributes()
#10 0xcc0d44 .../llvm/lib/Target/ARM/ARMAsmPrinter.cpp:632 llvm::ARMAsmPrinter::EmitStartOfAsmFile()
#11 0x14692ad .../llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp:162 llvm::AsmPrinter::doInitialization()
#12 0x1bc4677 .../llvm/lib/VMCore/PassManager.cpp:1561 llvm::FPPassManager::doInitialization()
#13 0x1bc4990 .../llvm/lib/VMCore/PassManager.cpp:1595 llvm::MPPassManager::runOnModule()
#14 0x1bc55e5 .../llvm/lib/VMCore/PassManager.cpp:1705 llvm::PassManagerImpl::run()
#15 0x1bc5878 .../llvm/lib/VMCore/PassManager.cpp:1740 llvm::PassManager::run()
#16 0xc3954d .../llvm/tools/llc/llc.cpp:378 compileModule()
#17 0xc38001 .../llvm/tools/llc/llc.cpp:194 main
#18 0x7fd557d6a11c __libc_start_main
0x7fd558b1af58 is located 24 bytes inside of 29-byte region [0x7fd558b1af40,0x7fd558b1af5d)
freed by thread T0 here:
#0 0xc337da .../llvm/projects/compiler-rt/lib/asan/asan_new_delete.cc:56 operator delete()
#1 0x1ee9cef .../libstdc++-v3/include/bits/basic_string.h:535 std::string::~string()
#2 0xea01dd .../llvm/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp:133 (anonymous namespace)::ARMELFStreamer::EmitDataMappingSymbol()
#3 0xe9f78b .../llvm/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp:91 (anonymous namespace)::ARMELFStreamer::EmitBytes()
#4 0x1b15d82 .../llvm/lib/MC/MCStreamer.cpp:89 llvm::MCStreamer::EmitIntValue()
#5 0xcc0f9b .../llvm/lib/Target/ARM/ARMAsmPrinter.cpp:713 llvm::ARMAsmPrinter::emitAttributes()
#6 0xcc0d44 .../llvm/lib/Target/ARM/ARMAsmPrinter.cpp:632 llvm::ARMAsmPrinter::EmitStartOfAsmFile()
#7 0x14692ad .../llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp:162 llvm::AsmPrinter::doInitialization()
#8 0x1bc4677 .../llvm/lib/VMCore/PassManager.cpp:1561 llvm::FPPassManager::doInitialization()
#9 0x1bc4990 .../llvm/lib/VMCore/PassManager.cpp:1595 llvm::MPPassManager::runOnModule()
#10 0x1bc55e5 .../llvm/lib/VMCore/PassManager.cpp:1705 llvm::PassManagerImpl::run()
#11 0x1bc5878 .../llvm/lib/VMCore/PassManager.cpp:1740 llvm::PassManager::run()
#12 0xc3954d .../llvm/tools/llc/llc.cpp:378 compileModule()
#13 0xc38001 .../llvm/tools/llc/llc.cpp:194 main
#14 0x7fd557d6a11c __libc_start_main
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169668 91177308-0d34-0410-b5e6-96231b3b80d8
brson
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Mar 28, 2013
Before: the function name was stored by the compiler as a constant string
and the run-time was printing it.
Now: the PC is stored instead and the run-time prints the full symbolized frame.
This adds a couple of instructions into every function with non-empty stack frame,
but also reduces the binary size because we store less strings (I saw 2% size reduction).
This change bumps the asan ABI version to v3.
llvm part.
Example of report (now):
==31711==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7fffa77cf1c5 at pc 0x41feb0 bp 0x7fffa77cefb0 sp 0x7fffa77cefa8
READ of size 1 at 0x7fffa77cf1c5 thread T0
#0 0x41feaf in Frame0(int, char*, char*, char*) stack-oob-frames.cc:20
#1 0x41f7ff in Frame1(int, char*, char*) stack-oob-frames.cc:24
#2 0x41f477 in Frame2(int, char*) stack-oob-frames.cc:28
#3 0x41f194 in Frame3(int) stack-oob-frames.cc:32
#4 0x41eee0 in main stack-oob-frames.cc:38
#5 0x7f0c5566f76c (/lib/x86_64-linux-gnu/libc.so.6+0x2176c)
#6 0x41eb1c (/usr/local/google/kcc/llvm_cmake/a.out+0x41eb1c)
Address 0x7fffa77cf1c5 is located in stack of thread T0 at offset 293 in frame
#0 0x41f87f in Frame0(int, char*, char*, char*) stack-oob-frames.cc:12 <<<<<<<<<<<<<< this is new
This frame has 6 object(s):
[32, 36) 'frame.addr'
[96, 104) 'a.addr'
[160, 168) 'b.addr'
[224, 232) 'c.addr'
[288, 292) 's'
[352, 360) 'd'
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177724 91177308-0d34-0410-b5e6-96231b3b80d8
brson
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May 25, 2013
Rather than just splitting the input type and hoping for the best, apply a bit more cleverness. Just splitting the types until the source is legal often leads to an illegal result time, which is then widened and a scalarization step is introduced which leads to truly horrible code generation. With the loop vectorizer, these sorts of operations are much more common, and so it's worth extra effort to do them well. Add a legalization hook for the operands of a TRUNCATE node, which will be encountered after the result type has been legalized, but if the operand type is still illegal. If simple splitting of both types ends up with the result type of each half still being legal, just do that (v16i16 -> v16i8 on ARM, for example). If, however, that would result in an illegal result type (v8i32 -> v8i8 on ARM, for example), we can get more clever with power-two vectors. Specifically, split the input type, but also widen the result element size, then concatenate the halves and truncate again. For example on ARM, To perform a "%res = v8i8 trunc v8i32 %in" we transform to: %inlo = v4i32 extract_subvector %in, 0 %inhi = v4i32 extract_subvector %in, 4 %lo16 = v4i16 trunc v4i32 %inlo %hi16 = v4i16 trunc v4i32 %inhi %in16 = v8i16 concat_vectors v4i16 %lo16, v4i16 %hi16 %res = v8i8 trunc v8i16 %in16 This allows instruction selection to generate three VMOVN instructions instead of a sequences of moves, stores and loads. Update the ARMTargetTransformInfo to take this improved legalization into account. Consider the simplified IR: define <16 x i8> @test1(<16 x i32>* %ap) { %a = load <16 x i32>* %ap %tmp = trunc <16 x i32> %a to <16 x i8> ret <16 x i8> %tmp } define <8 x i8> @test2(<8 x i32>* %ap) { %a = load <8 x i32>* %ap %tmp = trunc <8 x i32> %a to <8 x i8> ret <8 x i8> %tmp } Previously, we would generate the truly hideous: .syntax unified .section __TEXT,__text,regular,pure_instructions .globl _test1 .align 2 _test1: @ @test1 @ BB#0: push {r7} mov r7, sp sub sp, sp, #20 bic sp, sp, #7 add r1, r0, #48 add r2, r0, #32 vld1.64 {d24, d25}, [r0:128] vld1.64 {d16, d17}, [r1:128] vld1.64 {d18, d19}, [r2:128] add r1, r0, #16 vmovn.i32 d22, q8 vld1.64 {d16, d17}, [r1:128] vmovn.i32 d20, q9 vmovn.i32 d18, q12 vmov.u16 r0, d22[3] strb r0, [sp, #15] vmov.u16 r0, d22[2] strb r0, [sp, #14] vmov.u16 r0, d22[1] strb r0, [sp, #13] vmov.u16 r0, d22[0] vmovn.i32 d16, q8 strb r0, [sp, #12] vmov.u16 r0, d20[3] strb r0, [sp, #11] vmov.u16 r0, d20[2] strb r0, [sp, #10] vmov.u16 r0, d20[1] strb r0, [sp, #9] vmov.u16 r0, d20[0] strb r0, [sp, #8] vmov.u16 r0, d18[3] strb r0, [sp, #3] vmov.u16 r0, d18[2] strb r0, [sp, #2] vmov.u16 r0, d18[1] strb r0, [sp, #1] vmov.u16 r0, d18[0] strb r0, [sp] vmov.u16 r0, d16[3] strb r0, [sp, #7] vmov.u16 r0, d16[2] strb r0, [sp, #6] vmov.u16 r0, d16[1] strb r0, [sp, #5] vmov.u16 r0, d16[0] strb r0, [sp, #4] vldmia sp, {d16, d17} vmov r0, r1, d16 vmov r2, r3, d17 mov sp, r7 pop {r7} bx lr .globl _test2 .align 2 _test2: @ @test2 @ BB#0: push {r7} mov r7, sp sub sp, sp, #12 bic sp, sp, #7 vld1.64 {d16, d17}, [r0:128] add r0, r0, #16 vld1.64 {d20, d21}, [r0:128] vmovn.i32 d18, q8 vmov.u16 r0, d18[3] vmovn.i32 d16, q10 strb r0, [sp, #3] vmov.u16 r0, d18[2] strb r0, [sp, #2] vmov.u16 r0, d18[1] strb r0, [sp, #1] vmov.u16 r0, d18[0] strb r0, [sp] vmov.u16 r0, d16[3] strb r0, [sp, #7] vmov.u16 r0, d16[2] strb r0, [sp, #6] vmov.u16 r0, d16[1] strb r0, [sp, #5] vmov.u16 r0, d16[0] strb r0, [sp, #4] ldm sp, {r0, r1} mov sp, r7 pop {r7} bx lr Now, however, we generate the much more straightforward: .syntax unified .section __TEXT,__text,regular,pure_instructions .globl _test1 .align 2 _test1: @ @test1 @ BB#0: add r1, r0, #48 add r2, r0, #32 vld1.64 {d20, d21}, [r0:128] vld1.64 {d16, d17}, [r1:128] add r1, r0, #16 vld1.64 {d18, d19}, [r2:128] vld1.64 {d22, d23}, [r1:128] vmovn.i32 d17, q8 vmovn.i32 d16, q9 vmovn.i32 d18, q10 vmovn.i32 d19, q11 vmovn.i16 d17, q8 vmovn.i16 d16, q9 vmov r0, r1, d16 vmov r2, r3, d17 bx lr .globl _test2 .align 2 _test2: @ @test2 @ BB#0: vld1.64 {d16, d17}, [r0:128] add r0, r0, #16 vld1.64 {d18, d19}, [r0:128] vmovn.i32 d16, q8 vmovn.i32 d17, q9 vmovn.i16 d16, q8 vmov r0, r1, d16 bx lr git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179989 91177308-0d34-0410-b5e6-96231b3b80d8
luqmana
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Sep 19, 2014
Summary: I had only tested this code for ARMv7 and ARMv8. This patch adds several fallback paths if the processor does not support dmb ish: - dmb sy if a cortex-M with support for dmb - mcr p15, #0, r0, c7, c10, brson#5 for ARMv6 (special instruction equivalent to a DMB) These fallback paths were chosen based on the code for fence seq_cst. Thanks to luqmana for having noticed this bug. Test Plan: Added more cases to atomic-load-store.ll + make check-all Reviewers: jfb, t.p.northover, luqmana Subscribers: aemerson, llvm-commits Differential Revision: http://reviews.llvm.org/D5304 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217965 91177308-0d34-0410-b5e6-96231b3b80d8
luqmana
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Sep 19, 2014
Summary: This patch was originally in D5304 (I could not find a way to reopen that revision). It was accepted, commited and broke the build bots because the overloading of the constructor of ArrayRef for braced initializer lists is not supported by all toolchains. I then reverted it, and propose this fixed version that uses a plain C array instead in makeDMB (that array is then converted implicitly to an ArrayRef, but that is not behind an ifdef). Could someone confirm me whether initialization lists for plain C arrays are supported by every toolchain used to build llvm ? Otherwise I can just initialize the array in the old way: args[0] = ...; .. ; args[5] = ...; Below is the description of the original patch: ``` I had only tested this code for ARMv7 and ARMv8. This patch adds several fallback paths if the processor does not support dmb ish: - dmb sy if a cortex-M with support for dmb - mcr p15, #0, r0, c7, c10, brson#5 for ARMv6 (special instruction equivalent to a DMB) These fallback paths were chosen based on the code for fence seq_cst. Thanks to luqmana for having noticed this bug. ``` Test Plan: Added more cases to atomic-load-store.ll + make check-all Reviewers: jfb, t.p.northover, luqmana Subscribers: llvm-commits, aemerson Differential Revision: http://reviews.llvm.org/D5386 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218066 91177308-0d34-0410-b5e6-96231b3b80d8
alexcrichton
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Apr 27, 2018
Revert r330413: "[SSAUpdaterBulk] Use SmallVector instead of DenseMap for storing rewrites."
Revert r330403 "Reapply "[PR16756] Use SSAUpdaterBulk in JumpThreading." one more time."
r330403 commit seems to crash clang during our integrate while doing PGO build with the following stacktrace:
brson#2 llvm::SSAUpdaterBulk::RewriteAllUses(llvm::DominatorTree*, llvm::SmallVectorImpl<llvm::PHINode*>*)
brson#3 llvm::JumpThreadingPass::ThreadEdge(llvm::BasicBlock*, llvm::SmallVectorImpl<llvm::BasicBlock*> const&, llvm::BasicBlock*)
brson#4 llvm::JumpThreadingPass::ProcessThreadableEdges(llvm::Value*, llvm::BasicBlock*, llvm::jumpthreading::ConstantPreference, llvm::Instruction*)
brson#5 llvm::JumpThreadingPass::ProcessBlock(llvm::BasicBlock*)
The crash happens while compiling 'lib/Analysis/CallGraph.cpp'.
r3340413 is reverted due to conflicting changes.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@330416 91177308-0d34-0410-b5e6-96231b3b80d8
alexcrichton
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Aug 15, 2018
r335553 with the non-trivial unswitching of switches. The code correctly updated most aspects of the CFG and analyses, but missed some crucial aspects: 1) When multiple cases have the same successor, we unswitch that a single time and replace the switch with a direct branch. The CFG here is correct, but the target of this direct branch may have had a PHI node with multiple entries in it. 2) When we still have to clone a successor of the switch into an unswitched copy of the loop, we'll delete potentially multiple edges entering this successor, not just one. 3) We also have to delete multiple edges entering the successors in the original loop when they have to be retained. 4) When the "retained successor" *also* occurs as a case successor, we just assert failed everywhere. This doesn't happen very easily because its always valid to simply drop the case -- the retained successor for switches is always the default successor. However, it is likely possible through some contrivance of different loop passes, unrolling, and simplifying for this to occur in practice and certainly there is nothing "invalid" about the IR so this pass needs to handle it. 5) In the case of brson#4, we also will replace these multiple edges with a direct branch much like in brson#1 and need to collapse the entries in any PHI nodes to a single enrty. All of this stems from the delightful fact that the same successor can show up in multiple parts of the switch terminator, and each of these are considered a distinct edge for the purpose of PHI nodes (and iterating the successors and predecessors) but not for unswitching itself, the dominator tree, or many other things. For the record, I intensely dislike this "feature" of the IR in large part because of the complexity it causes in passes like this. We already have a ton of logic building sets and handling duplicates, and we just had to add a bunch more. I've added a complex test case that covers all five of the above failure modes. I've also added a variation on it where brson#4 and brson#5 occur in loop exit, adding fun where we have an LCSSA PHI node with "multiple entries" despite have dedicated exits. There were no additional issues found by this, but it seems a useful corner case to cover with testing. One thing that working on all of this code has made painfully clear for me as well is how amazingly inefficient our PHI node representation is (in terms of the in-memory data structures and the APIs used to update them). This code has truly marvelous complexity bounds because every time we remove an entry from a PHI node we do a linear scan to find it and then a linear update to the data structure to remove it. We could in theory batch all of the PHI node updates into a single linear walk of the operands making this much more efficient, but the APIs fight hard against this and the fact that we have to handle duplicates in the peculiar manner we do (removing all but one in some cases) makes even implementing that very tedious and annoying. Anyways, none of this is new here or specific to loop unswitching. All code in LLVM that updates PHI node operands suffers from these problems. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@336536 91177308-0d34-0410-b5e6-96231b3b80d8
alexcrichton
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Aug 15, 2018
…d VPlan for tests." Memory leaks in tests. http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-bootstrap/builds/6289/steps/check-llvm%20asan/logs/stdio Direct leak of 192 byte(s) in 1 object(s) allocated from: #0 0x554ea8 in operator new(unsigned long) /b/sanitizer-x86_64-linux-bootstrap/build/llvm/projects/compiler-rt/lib/asan/asan_new_delete.cc:106 brson#1 0x56cef1 in llvm::VPlanTestBase::doAnalysis(llvm::Function&) /b/sanitizer-x86_64-linux-bootstrap/build/llvm/unittests/Transforms/Vectorize/VPlanTestBase.h:53:14 brson#2 0x56bec4 in llvm::VPlanTestBase::buildHCFG(llvm::BasicBlock*) /b/sanitizer-x86_64-linux-bootstrap/build/llvm/unittests/Transforms/Vectorize/VPlanTestBase.h:57:3 brson#3 0x571f1e in llvm::(anonymous namespace)::VPlanHCFGTest_testVPInstructionToVPRecipesInner_Test::TestBody() /b/sanitizer-x86_64-linux-bootstrap/build/llvm/unittests/Transforms/Vectorize/VPlanHCFGTest.cpp:119:15 brson#4 0xed2291 in testing::Test::Run() /b/sanitizer-x86_64-linux-bootstrap/build/llvm/utils/unittest/googletest/src/gtest.cc brson#5 0xed44c8 in testing::TestInfo::Run() /b/sanitizer-x86_64-linux-bootstrap/build/llvm/utils/unittest/googletest/src/gtest.cc:2656:11 brson#6 0xed5890 in testing::TestCase::Run() /b/sanitizer-x86_64-linux-bootstrap/build/llvm/utils/unittest/googletest/src/gtest.cc:2774:28 brson#7 0xef3634 in testing::internal::UnitTestImpl::RunAllTests() /b/sanitizer-x86_64-linux-bootstrap/build/llvm/utils/unittest/googletest/src/gtest.cc:4649:43 brson#8 0xef27e0 in testing::UnitTest::Run() /b/sanitizer-x86_64-linux-bootstrap/build/llvm/utils/unittest/googletest/src/gtest.cc #9 0xebbc23 in RUN_ALL_TESTS /b/sanitizer-x86_64-linux-bootstrap/build/llvm/utils/unittest/googletest/include/gtest/gtest.h:2233:46 #10 0xebbc23 in main /b/sanitizer-x86_64-linux-bootstrap/build/llvm/utils/unittest/UnitTestMain/TestMain.cpp:51 #11 0x7f65569592e0 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x202e0) and more. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@336718 91177308-0d34-0410-b5e6-96231b3b80d8
alexcrichton
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Aug 15, 2018
…ering"
This reverts commit r337021.
WARNING: MemorySanitizer: use-of-uninitialized-value
#0 0x1415cd65 in void write_signed<long>(llvm::raw_ostream&, long, unsigned long, llvm::IntegerStyle) /code/llvm-project/llvm/lib/Support/NativeFormatting.cpp:95:7
brson#1 0x1415c900 in llvm::write_integer(llvm::raw_ostream&, long, unsigned long, llvm::IntegerStyle) /code/llvm-project/llvm/lib/Support/NativeFormatting.cpp:121:3
brson#2 0x1472357f in llvm::raw_ostream::operator<<(long) /code/llvm-project/llvm/lib/Support/raw_ostream.cpp:117:3
brson#3 0x13bb9d4 in llvm::raw_ostream::operator<<(int) /code/llvm-project/llvm/include/llvm/Support/raw_ostream.h:210:18
brson#4 0x3c2bc18 in void printField<unsigned int, &(amd_kernel_code_s::amd_kernel_code_version_major)>(llvm::StringRef, amd_kernel_code_s const&, llvm::raw_ostream&) /code/llvm-project/llvm/lib/Target/AMDGPU/Utils/AMDKernelCodeTUtils.cpp:78:23
brson#5 0x3c250ba in llvm::printAmdKernelCodeField(amd_kernel_code_s const&, int, llvm::raw_ostream&) /code/llvm-project/llvm/lib/Target/AMDGPU/Utils/AMDKernelCodeTUtils.cpp:104:5
brson#6 0x3c27ca3 in llvm::dumpAmdKernelCode(amd_kernel_code_s const*, llvm::raw_ostream&, char const*) /code/llvm-project/llvm/lib/Target/AMDGPU/Utils/AMDKernelCodeTUtils.cpp:113:5
brson#7 0x3a46e6c in llvm::AMDGPUTargetAsmStreamer::EmitAMDKernelCodeT(amd_kernel_code_s const&) /code/llvm-project/llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.cpp:161:3
brson#8 0xd371e4 in llvm::AMDGPUAsmPrinter::EmitFunctionBodyStart() /code/llvm-project/llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp:204:26
[...]
Uninitialized value was created by an allocation of 'KernelCode' in the stack frame of function '_ZN4llvm16AMDGPUAsmPrinter21EmitFunctionBodyStartEv'
#0 0xd36650 in llvm::AMDGPUAsmPrinter::EmitFunctionBodyStart() /code/llvm-project/llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp:192
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337079 91177308-0d34-0410-b5e6-96231b3b80d8
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Sorry to do this again, but I just found out that my compiler-rt update wasn't compiling on my osx 10.6.8 box. This patch reverts compiler-rt a couple times, which seems to work.