To facilitate optimization pass understanding of the conditional branch for microblaze, remove the UNSPEC'd signed_compare / unsigned_compare instructions, and replace with a complete branch_compare which will output_asm_insn the correct cmp/cmpu depending on comparison code and signed / unsigned.
We then return the correct branch instruction. cbranchsi now calls an expanded microblaze_expand_conditional_branch function which will carry out compare against zero, compare EQ/NE, and all other compares appropriately. -funroll-loops optimization pass can now proceed Changelog 2013-07-15 David Holsgrove <david.holsgr...@xilinx.com> * gcc/config/microblaze/predicates.md: Add cmp_op predicate. * gcc/config/microblaze/microblaze.md: Add branch_compare instruction which uses cmp_op predicate and emits cmp insn before branch. * gcc/config/microblaze/microblaze.c (microblaze_emit_compare): Rename to microblaze_expand_conditional_branch and consolidate logic. (microblaze_expand_conditional_branch): emit branch_compare insn instead of handling cmp op separate from branch insn. thanks, David
0009-Patch-microblaze-Add-branch_compare-instruction.patch
Description: Binary data
