gnu /
gcc /
2cad8a59a8060b0897d18d4075d96eb7c541e845 [Ada] Use static stack allocation for small dynamic string concatenations
This changes the expanded code generated for dynamic concatenations to
use a static array subtype for the temporary created on the stack if a
small upper bound can be computed for the length of the result. Static
stack allocation is preferred over dynamic allocation for code
generation purposes.
gcc/ada/
* exp_ch3.adb (Expand_N_Object_Declaration.Rewrite_As_Renaming):
Be prepared for slices.
* exp_ch4.adb (Get_First_Index_Bounds): New procedure.
(Expand_Array_Comparison.Length_Less_Than_4): Call it.
(Expand_Concatenate): Try to compute a maximum length for
operands with variable length and a maximum total length at the
end. If the concatenation is dynamic, but a sensible maximum
total length has been computed, use this length to create a
static array subtype for the temporary and return a slice of it.
2 files changed
