b7b387e120
So one of the broad goals we've had over the last few months has been to ensure that every insn has a scheduling type and that every insn is associated with an insn reservation in the scheduler. This avoids some amazingly bad behavior in the scheduler. I won't go through the gory details. I was recently analyzing a code quality regression with dhrystone (ugh!) and one of the issues was poor scheduling which lengthened the lifetime of a pseudo and ultimately resulted in needing an additional callee saved register save/restore. This was ultimately tracked down incorrect types on a few patterns. So I did an audit of all the patterns that had types added/changed as part of this effort and found a variety of problems, primarily in the various move patterns and extension patterns. This is a regression relative to gcc-13. Naturally the change in types affects scheduling, which in turn changes the precise code we generate and causes some testsuite fallout. I considered updating the regexps since the change in the resulting output is pretty consistent. But of course the test would still be sensitive to things like load latency. So instead I just turned off the 2nd phase scheduler in the affected tests. Bootstrapped and regression tested on rv64gc-linux-gnu. gcc * config/riscv/riscv.md (zero_extendqi<SUPERQI:mode>2_internal): Fix type attribute. (extendsidi2_internal, movhf_hardfloat, movhf_softfloat): Likewise. (movdi_32bit, movdi_64bit, movsi_internal): Likewise. (movhi_internal, movqi_internal): Likewise. (movsf_softfloat, movsf_hardfloat): Likewise. (movdf_hardfloat_rv32, movdf_hardfloat_rv64): Likewise. (movdf_softfloat): Likewise. gcc/testsuite * gcc.target/riscv/rvv/autovec/vls/calling-convention-1.c: Turn off second phase scheduler. * gcc.target/riscv/rvv/autovec/vls/calling-convention-2.c: Likewise. * gcc.target/riscv/rvv/autovec/vls/calling-convention-3.c: Likewise. * gcc.target/riscv/rvv/autovec/vls/calling-convention-4.c: Likewise. * gcc.target/riscv/rvv/autovec/vls/calling-convention-5.c: Likewise. * gcc.target/riscv/rvv/autovec/vls/calling-convention-6.c: Likewise. * gcc.target/riscv/rvv/autovec/vls/calling-convention-7.c: Likewise. |
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