[LLVMbugs] [Bug 23975] New: Assert in SLSR on Luxmark Hotel

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Sat Jun 27 11:02:47 PDT 2015


            Bug ID: 23975
           Summary: Assert in SLSR on Luxmark Hotel
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Scalar Optimizations
          Assignee: unassignedbugs at nondot.org
          Reporter: Matthew.Arsenault at amd.com
                CC: llvmbugs at cs.uiuc.edu, wujingyue at gmail.com
    Classification: Unclassified

Created attachment 14528
  --> https://llvm.org/bugs/attachment.cgi?id=14528&action=edit
Function reduced testcase

Testcase is the function reduced IR, but I'm hitting multiple bugpoint bugs
when trying to reduce it further.

Run testcase with opt -S -separate-const-offset-from-gep -slsr -o -

The SLSR pass crashes attempting to do an invalid RAUW.

It is atempting to replace a value of type %struct.Matrix4x4 addrspace(1)* with
a value of type float addrspace(1)*

opt: /home/matt/src/llvm/lib/IR/Value.cpp:358: void
llvm::Value::replaceAllUsesWith(llvm::Value*): Assertion `New->getType() ==
getType() && "replaceAllUses of value with new value of different type!"'

Program received signal SIGABRT, Aborted.
0x00007fffe739d528 in raise () from /usr/lib/libc.so.6
(gdb) bt
#0  0x00007fffe739d528 in raise () from /usr/lib/libc.so.6
#1  0x00007fffe739e93a in abort () from /usr/lib/libc.so.6
#2  0x00007fffe73963a7 in __assert_fail_base () from /usr/lib/libc.so.6
#3  0x00007fffe7396452 in __assert_fail () from /usr/lib/libc.so.6
#4  0x00007fffeb1ae2be in llvm::Value::replaceAllUsesWith (this=0x728c88,
New=0x763cf0) at /home/matt/src/llvm/lib/IR/Value.cpp:357
#5  0x00007fffe93d765c in (anonymous
(this=0x71fb70, C=..., Basis=...)
#6  0x00007fffe93d78dc in (anonymous
namespace)::StraightLineStrengthReduce::runOnFunction (this=0x71fb70, F=...) at
#7  0x00007fffeb15df61 in llvm::FPPassManager::runOnFunction (this=0x746540,
F=...) at /home/matt/src/llvm/lib/IR/LegacyPassManager.cpp:1520
#8  0x00007fffeb15e0c0 in llvm::FPPassManager::runOnModule (this=0x746540,
M=...) at /home/matt/src/llvm/lib/IR/LegacyPassManager.cpp:1540
#9  0x00007fffeb15e3ef in (anonymous namespace)::MPPassManager::runOnModule
(this=0x741050, M=...) at /home/matt/src/llvm/lib/IR/LegacyPassManager.cpp:1596
#10 0x00007fffeb15ea50 in llvm::legacy::PassManagerImpl::run (this=0x740ca0,
M=...) at /home/matt/src/llvm/lib/IR/LegacyPassManager.cpp:1698
#11 0x00007fffeb15ec55 in llvm::legacy::PassManager::run (this=0x7fffffffdb20,
M=...) at /home/matt/src/llvm/lib/IR/LegacyPassManager.cpp:1729
#12 0x000000000048641d in main (argc=7, argv=0x7fffffffe038) at

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