On alpha, I am seeing a problem with Emiting va_copy. valists are structs and allocated by alloca, unlike x86. EmitBuiltinVACopy is therefore using the second branch of the if (~llvm-convert.cpp:6538) to emit the second argument. The second argument is the result of an alloca. TreeToLLVM::Emit is hitting the first assertion (~929). The exp being passed is: <var_decl 0x20000b44240 ap type <record_type 0x200008f96b0 va_list sizes-gimplified no-force-blk BLK size <integer_cst 0x20000820ea0 constant invariant 128> unit size <integer_cst 0x20000820ed0 constant invariant 16> align 64 symtab 0 alias set -1 fields <field_decl 0x20000846180 __base type <pointer_type 0x20000833130> unsigned asm-frame-size 0 DI file <built-in> line 0 size <integer_cst 0x20000820b70 constant invariant 64> unit size <integer_cst 0x20000820ba0 constant invariant 8> align 64 offset_align 128 offset <integer_cst 0x20000820510 constant invariant 0> bit offset <integer_cst 0x20000821530 constant invariant 0> context <record_type 0x200008440b0 __va_list_tag> chain <field_decl 0x200008460c0 __offset>> pointer_to_this <pointer_type 0x20000b4c210>> addressable used asm-frame-size 0 BLK file ../../source/gcc/libgcov.c line 818 size <integer_cst 0x20000820ea0 128> unit size <integer_cst 0x20000820ed0 16> align 64 context <function_decl 0x20000b08300 __gcov_execl> LLVM: %struct.va_list* %ap chain <var_decl 0x20000b44300 aq>> DestLoc is 0. Anyone have a suggestion on how to fix this? Thanks, Andrew