Fix some problems with stats reset & floss counters.
Fix some problems with stats reset & floss counters.

arch/alpha/isa_desc:
    Keep m5 pseudo-instructions (like resetstats) from taking effect
    on misspeculated paths.

--HG--
extra : convert_revision : 7f0b0490164bca377ff2b14abc35a6c26bac9e6d

rjschof/gem5,briancoutinho0905/2dsampling,austinharris/gem5-riscv,SanchayanMaity/gem5,SanchayanMaity/gem5,yb-kim/gemV,cancro7/gem5,TUD-OS/gem5-dtu,rjschof/gem5,TUD-OS/gem5-dtu,markoshorro/gem5,aclifton/cpeg853-gem5,aclifton/cpeg853-gem5,yb-kim/gemV,aclifton/cpeg853-gem5,powerjg/gem5-ci-test,TUD-OS/gem5-dtu,markoshorro/gem5,sobercoder/gem5,markoshorro/gem5,rallylee/gem5,qizenguf/MLC-STT,cancro7/gem5,yb-kim/gemV,powerjg/gem5-ci-test,powerjg/gem5-ci-test,rjschof/gem5,rallylee/gem5,rallylee/gem5,gem5/gem5,rallylee/gem5,kaiyuanl/gem5,aclifton/cpeg853-gem5,kaiyuanl/gem5,SanchayanMaity/gem5,zlfben/gem5,briancoutinho0905/2dsampling,gedare/gem5,joerocklin/gem5,joerocklin/gem5,gem5/gem5,KuroeKurose/gem5,qizenguf/MLC-STT,sobercoder/gem5,KuroeKurose/gem5,austinharris/gem5-riscv,HwisooSo/gemV-update,powerjg/gem5-ci-test,samueldotj/TeeRISC-Simulator,yb-kim/gemV,aclifton/cpeg853-gem5,SanchayanMaity/gem5,gem5/gem5,joerocklin/gem5,rallylee/gem5,TUD-OS/gem5-dtu,Weil0ng/gem5,briancoutinho0905/2dsampling,Weil0ng/gem5,rjschof/gem5,gedare/gem5,qizenguf/MLC-STT,SanchayanMaity/gem5,joerocklin/gem5,aclifton/cpeg853-gem5,samueldotj/TeeRISC-Simulator,HwisooSo/gemV-update,KuroeKurose/gem5,TUD-OS/gem5-dtu,HwisooSo/gemV-update,gem5/gem5,gedare/gem5,joerocklin/gem5,kaiyuanl/gem5,powerjg/gem5-ci-test,KuroeKurose/gem5,austinharris/gem5-riscv,cancro7/gem5,gem5/gem5,KuroeKurose/gem5,rjschof/gem5,aclifton/cpeg853-gem5,qizenguf/MLC-STT,rallylee/gem5,sobercoder/gem5,yb-kim/gemV,gedare/gem5,austinharris/gem5-riscv,austinharris/gem5-riscv,briancoutinho0905/2dsampling,sobercoder/gem5,rjschof/gem5,kaiyuanl/gem5,zlfben/gem5,austinharris/gem5-riscv,samueldotj/TeeRISC-Simulator,cancro7/gem5,kaiyuanl/gem5,Weil0ng/gem5,yb-kim/gemV,joerocklin/gem5,gem5/gem5,powerjg/gem5-ci-test,TUD-OS/gem5-dtu,gedare/gem5,powerjg/gem5-ci-test,samueldotj/TeeRISC-Simulator,samueldotj/TeeRISC-Simulator,zlfben/gem5,briancoutinho0905/2dsampling,markoshorro/gem5,briancoutinho0905/2dsampling,sobercoder/gem5,cancro7/gem5,kaiyuanl/gem5,cancro7/gem5,gedare/gem5,kaiyuanl/gem5,HwisooSo/gemV-update,austinharris/gem5-riscv,zlfben/gem5,qizenguf/MLC-STT,briancoutinho0905/2dsampling,qizenguf/MLC-STT,sobercoder/gem5,zlfben/gem5,markoshorro/gem5,HwisooSo/gemV-update,Weil0ng/gem5,zlfben/gem5,yb-kim/gemV,SanchayanMaity/gem5,KuroeKurose/gem5,qizenguf/MLC-STT,zlfben/gem5,Weil0ng/gem5,joerocklin/gem5,HwisooSo/gemV-update,gedare/gem5,samueldotj/TeeRISC-Simulator,HwisooSo/gemV-update,markoshorro/gem5,joerocklin/gem5,rallylee/gem5,SanchayanMaity/gem5,sobercoder/gem5,cancro7/gem5,samueldotj/TeeRISC-Simulator,Weil0ng/gem5,rjschof/gem5,TUD-OS/gem5-dtu,KuroeKurose/gem5,markoshorro/gem5,gem5/gem5,Weil0ng/gem5,yb-kim/gemV