tree b3dd04a0b1a7e0320b2b7e27ad6a471c3dd3643e
parent b6cbe517237c3c223beb064d60d5b49e56d65c06
author Bill Schmidt <wschmidt@linux.vnet.ibm.com> 1358185536 +0000
committer Bill Schmidt <wschmidt@linux.vnet.ibm.com> 1358185536 +0000

This patch addresses varargs processing for small complex types under
the 64-bit PowerPC ELF ABI.

The ABI requires that the real and imaginary parts of a complex argument
each occupy their own doubleword.  Arguments smaller than 8 bytes are
right-adjusted within the doubleword.

Clang expects EmitVAARG() to return a pointer to a structure in which
the real and imaginary parts are packed adjacently in memory.  To accomplish
this, we generate code to load the code appropriately from the varargs
location and pack the values into a temporary variable in the form Clang
expects, returning a pointer to that structure.

The test case demonstrates correct code generation for all "small" complex
types on PPC64:  int, short, char, and float.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172438 91177308-0d34-0410-b5e6-96231b3b80d8