mem: Fix sender state bug and delay popping
mem: Fix sender state bug and delay popping

This patch fixes a newly introduced bug where the sender state was
popped before checking that it should be. Amazingly all regressions
pass, but Linux fails to boot on the detailed CPU with caches enabled.

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