[llvm-dev] union return type
Julien Schmitt via llvm-dev
llvm-dev at lists.llvm.org
Wed Apr 19 01:38:18 PDT 2017
I need your help to understand my problem:
I'm compiling a code for 2 different targets (x86_64 and sparc). In this
code, I define a union which is basically a int32 and a function which
returns this union. The compilation of this code produces 2 different IRs :
* for x86, the return type is int32,
* for sparc, the return type is a struct (first argument of the function
with attribute sret).
I guess an optimization pass is called to simplify the return type in
first case but i have no idea which one ?
Does anybody have an explanation ?
More information about the llvm-dev