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[verilator] Remove clock gating waiver and add extra warning

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The -Wwarn-IMPERFECTSCH flag is suggested in the Verilator docs (to
help spot if we get a clock gating hint wrong). The waiver is no
longer needed because we now add the relevant hint in the
RTL (vendored in prim_generic_clock_gating.sv from OpenTitan).
This commit is contained in:
Rupert Swarbrick 2021-01-11 08:43:05 +00:00 • committed by Rupert Swarbrick
parent 07b65abbd0
commit fbe4e9da08
2 changed files with 1 additions and 5 deletions
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5
lint/verilator_waiver.vlt
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@ -64,11 +64,6 @@ lint_off -rule UNUSED -file "*/rtl/ibex_compressed_decoder.sv" -match "*rst_ni*"
lint_off -rule UNUSED -file "*/rtl/ibex_decoder.sv" -match "*rst_ni*"
lint_off -rule UNUSED -file "*/rtl/ibex_branch_predict.sv" -match "*rst_ni*"
// Signal unoptimizable: Feedback to clock or circular logic:
// ibex_core.cs_registers_i.mie_q
// Issue lowrisc/ibex#212
lint_off -rule UNOPTFLAT -file "*/rtl/ibex_csr.sv" -match "*ibex_core.cs_registers_i.u_mie_csr.rdata_q*"
// Temporary waivers until OpenTitan primitives are lint-clean
// https://github.com/lowRISC/opentitan/issues/2313
lint_off -file "*/lowrisc_prim_*/rtl/*.sv"