1 ; RUN: llc -march=x86-64 -mcpu=core2 -enable-misched -misched=shuffle -misched-bottomup < %s 2 ; REQUIRES: asserts 3 ; 4 ; Interesting MachineScheduler cases. 5 ; 6 ; FIXME: There should be an assert in the coalescer that we're not rematting 7 ; "not-quite-dead" copies, but that breaks a lot of tests <rdar://problem/11148682>. 8 9 declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind 10 11 ; From oggenc. 12 ; After coalescing, we have a dead superreg (RAX) definition. 13 ; 14 ; CHECK: xorl %esi, %esi 15 ; CHECK: movl $32, %ecx 16 ; CHECK: rep;movsl 17 define fastcc void @_preextrapolate_helper() nounwind uwtable ssp { 18 entry: 19 br i1 undef, label %for.cond.preheader, label %if.end 20 21 for.cond.preheader: ; preds = %entry 22 call void @llvm.memcpy.p0i8.p0i8.i64(i8* undef, i8* null, i64 128, i32 4, i1 false) nounwind 23 unreachable 24 25 if.end: ; preds = %entry 26 ret void 27 } 28
