[LLVMdev] flag_unit_at_a_time and pass scheduling in llvm-gcc
Duncan Sands
baldrick at free.fr
Tue Apr 15 23:49:22 PDT 2008
In llvm-backend.cpp I see:
if (optimize > 1) {
if (flag_inline_trees > 1) // respect -fno-inline-functions
PM->add(createFunctionInliningPass()); // Inline small functions
if (flag_unit_at_a_time && !lang_hooks.flag_no_builtin())
PM->add(createSimplifyLibCallsPass()); // Library Call Optimizations
if (optimize > 2)
PM->add(createArgumentPromotionPass()); // Scalarize uninlined fn args
}
Shouldn't createFunctionInliningPass and createArgumentPromotionPass only be
called if flag_unit_at_a_time is true? As far as I can see flag_unit_at_a_time
is used to control whether inter-procedural/whole-module passes are scheduled.
Thanks,
Duncan.
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