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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Odd type confuses OpenMP outlined Function Signature, result is "calling a function with a bad signature""
href="http://bugs.llvm.org/show_bug.cgi?id=32333">32333</a>
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<th>Summary</th>
<td>Odd type confuses OpenMP outlined Function Signature, result is "calling a function with a bad signature"
</td>
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<th>Product</th>
<td>OpenMP
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Clang Compiler Support
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>erich.keane@intel.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<pre>The following error happens on current trunk:
void llvm::CallInst::init(llvm::FunctionType*, llvm::Value*,
llvm::ArrayRef<llvm::Value*>,
llvm::ArrayRef<llvm::OperandBundleDefT<llvm::Value*> >, const llvm::Twine&):
Assertion `(i >= FTy->getNumParams() || FTy->getParamType(i) ==
Args[i]->getType()) && "Calling a function with a bad signature!"' failed.
when compiling the SECOND function below. First included for
discussion/comparison sake.
int a;
void fn1 ()
{
int *c[a];
#pragma omp parallel if(0)
c[0][0];
}
void fn2 ()
{
int(*b)[a];
#pragma omp parallel if(0)
b[0][0];
}
The issue is that the outlined function is generated with a different
signature, despite the Args being the same by the time the call comes around:
fn1 (good function), generates @.omp_outlined. with the signature:
define internal void @.omp_outlined.(i32* noalias %.global_tid., i32* noalias
%.bound_tid., i64 %vla, i32** %c) #2
fn2 (bad function) generates a similar function with the following signature
(note the last param!):
define internal void @.omp_outlined..1(i32* noalias %.global_tid., i32* noalias
%.bound_tid., i64 %vla, i32* %b) #0
I debugged this down to CodeGenFunction::GenerateOpenMPCapturedStmtFunction.
FuncInfo seems to be generated correctly, with its last param being
(gdb) p (FuncInfo.arg_begin() + 3)->type.Stored.dump()
PointerType 0x99d6ac0 'int **'
`-PointerType 0x99d6550 'int *'
`-BuiltinType 0x997b680 'int'
AND
(gdb) p (FuncInfo.arg_begin() + 3)->type.Stored.dump()
PointerType 0x99deea0 'int (*)[*]' variably_modified
`-VariableArrayType 0x99dee60 'int [*]' variably_modified *
|-BuiltinType 0x997b680 'int'
`-<<<NULL>>>
RESPECTIVELY.
However, the conversion to FuncLLVMTy ends up switching these to int** and int*
instead of int** for both.
I'm basically lost as to where to debug from here. I THINK that int *c[a] and
int (*c)[a] should eventually decay to the same type, but CGM doesn't seem to
think so. Anyone have guidance or an idea on where to go next?</pre>
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