Displaying 1 result from an estimated 1 matches for "990106".
2004 Jul 08
4
[LLVMdev] PHI nodes in machine code
Could anybody quickly explain why PHI nodes instructions are necessary in
machine code? And why the code in LiveVariables.cpp which looks at those PHI
nodes (line 249 and below) is necessary.
The reason I'm asking is that I try to support 64-bit comparison and I do it
by generating code like:
// if high1 cond high2: goto operand0
// if high1 reverse_cond high2: