http://llvm.org/bugs/show_bug.cgi?id=21403
Bug ID: 21403
Summary: Assertion "Dangling pointers found in call sites map"
with -ffast-math and __builtin_sqrtf
Product: clang
Version: trunk
Hardware: Macintosh
OS: MacOS X
Status: NEW
Severity: normal
Priority: P
Component: LLVM Codegen
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 13257
--> http://llvm.org/bugs/attachment.cgi?id=13257&action=edit
Log of clang run
The following code crashes clang r220769 when being compiled with -ffast-math
and -O1:
__attribute__((__always_inline__)) static float sqr(float f)
{
return f * f;
}
__attribute__((__always_inline__)) static float sqrt(float f)
{
return __builtin_sqrtf(f);
}
float bar(float f)
{
return sqrt(sqr(f));
}
This results in (full log attached):
% clang++ -O1 -ffast-math -c clang.cpp
Assertion failed: (CallSites.empty() && "Dangling pointers found in call sites
map"), function RefreshCallGraph, file
/Users/rynnsauer/LLVM/llvm/lib/Analysis/IPA/CallGraphSCCPass.cpp, line 343.
0 clang 0x00000001032b2f0f
llvm::sys::PrintStackTrace(__sFILE*) + 47
1 clang 0x00000001032b372b SignalHandler(int) + 555
2 libsystem_platform.dylib 0x00007fff9036a5aa _sigtramp + 26
3 libsystem_platform.dylib 000000000000000000 _sigtramp + 1875466864
4 clang 0x00000001032b34e6 abort + 22
5 clang 0x00000001032b34c1 __assert_rtn + 81
6 clang 0x0000000102f15132 (anonymous
namespace)::CGPassManager::RefreshCallGraph(llvm::CallGraphSCC&,
llvm::CallGraph&, bool) + 4034
7 clang 0x0000000102f13ba5 (anonymous
namespace)::CGPassManager::runOnModule(llvm::Module&) + 2677
8 clang 0x000000010323b621
llvm::legacy::PassManagerImpl::run(llvm::Module&) + 1137
The code compiles successfully with clang r219601.
Slight changes in the code also make it compile successfully: Removing the call
to "sqr" or "sqrt", or removing the "always inline" attribute all result in a
successful compile.
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