a047513c92
this patch enables pressure-aware scheduling for riscv. There have been various requests for it so I figured I'd just go ahead and send the patch. There is some slight regression in code quality for a number of vector tests where we spill more due to different instructions order. The ones I looked at were a mix of bad luck and/or brittle tests. Comparing the size of the generated assembly or the number of vsetvls for SPECint also didn't show any immediate benefit but that's obviously not a very fine-grained analysis. As cost and scheduling models mature I expect the situation to improve and for now I think it's generally favorable to enable pressure-aware scheduling so we can work with it rather than trying to find every possible problem in advance. gcc/ChangeLog: * common/config/riscv/riscv-common.cc: Add -fsched-pressure. * config/riscv/riscv.cc (riscv_option_override): Set sched pressure algorithm. gcc/testsuite/ChangeLog: * gcc.target/riscv/rvv/base/narrow_constraint-1.c: Add -fno-sched-pressure. * gcc.target/riscv/rvv/base/narrow_constraint-17.c: Ditto. * gcc.target/riscv/rvv/base/narrow_constraint-18.c: Ditto. * gcc.target/riscv/rvv/base/narrow_constraint-19.c: Ditto. * gcc.target/riscv/rvv/base/narrow_constraint-20.c: Ditto. * gcc.target/riscv/rvv/base/narrow_constraint-21.c: Ditto. * gcc.target/riscv/rvv/base/narrow_constraint-22.c: Ditto. * gcc.target/riscv/rvv/base/narrow_constraint-23.c: Ditto. * gcc.target/riscv/rvv/base/narrow_constraint-24.c: Ditto. * gcc.target/riscv/rvv/base/narrow_constraint-25.c: Ditto. * gcc.target/riscv/rvv/base/narrow_constraint-26.c: Ditto. * gcc.target/riscv/rvv/base/narrow_constraint-27.c: Ditto. * gcc.target/riscv/rvv/base/narrow_constraint-28.c: Ditto. * gcc.target/riscv/rvv/base/narrow_constraint-29.c: Ditto. * gcc.target/riscv/rvv/base/narrow_constraint-30.c: Ditto. * gcc.target/riscv/rvv/base/narrow_constraint-31.c: Ditto. * gcc.target/riscv/rvv/base/narrow_constraint-4.c: Ditto. * gcc.target/riscv/rvv/base/narrow_constraint-5.c: Ditto. * gcc.target/riscv/rvv/base/narrow_constraint-8.c: Ditto. * gcc.target/riscv/rvv/base/narrow_constraint-9.c: Ditto. * gcc.target/riscv/rvv/vsetvl/vlmax_bb_prop-10.c: Ditto. * gcc.target/riscv/rvv/vsetvl/vlmax_bb_prop-11.c: Ditto. * gcc.target/riscv/rvv/vsetvl/vlmax_bb_prop-12.c: Ditto. * gcc.target/riscv/rvv/vsetvl/vlmax_bb_prop-3.c: Ditto. * gcc.target/riscv/rvv/vsetvl/vlmax_bb_prop-9.c: Ditto. |
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