[LLVMdev] Extended Inline asm with double data type crashes clang

[rajesh viswabramana]

Hi,

Clang crashes when below snippet of code is compiled (used latest svn
version)

 *double func1()
{
  double x ;*
*  asm ( "" : "=r"(x) : "0"(x) );
  return x;
}*

> *clang -S test1.c*
> *Assertion failed: (PartVT.isInteger() || PartVT == MVT::x86mmx) &&
ValueVT.isInteger() && "Unknown mismatch!", file
..\..\..\..\lib\CodeGen\SelectionDAG\SelectionDAGBuilder.cpp, line 378*


Compilation sucessful, If data type passed to inline asm is of *float*
*  float x ;*
 *  asm ( "" : "=r"(x) : "0"(x) );    *
**
*(or) *If double data type passed to float type of registers
*double x;*
*asm ( "" : "=t"(x) : "0"(x) );*

It seems currently LLVM (selectionDAG) doesn't handle double to general
purpose register storing.
Could anyone please comment on this.

Regards,
Rajesh
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20121120/8a4361d7/attachment.html>