1; Without list-burr scheduling we may not see the difference in codegen here. 2; Use a subtarget that has post-RA scheduling enabled because the anti-dependency 3; breaker requires liveness information to be kept. 4; RUN: llc < %s -march=x86-64 -mcpu=atom -enable-misched=false -post-RA-scheduler -pre-RA-sched=list-burr -break-anti-dependencies=none > %t 5; RUN: grep "%xmm0" %t | count 14 6; RUN: not grep "%xmm1" %t 7; RUN: llc < %s -march=x86-64 -mcpu=atom -post-RA-scheduler -break-anti-dependencies=critical > %t 8; RUN: grep "%xmm0" %t | count 7 9; RUN: grep "%xmm1" %t | count 7 10 11define void @goo(double* %r, double* %p, double* %q) nounwind { 12entry: 13 %0 = load double, double* %p, align 8 14 %1 = fadd double %0, 1.100000e+00 15 %2 = fmul double %1, 1.200000e+00 16 %3 = fadd double %2, 1.300000e+00 17 %4 = fmul double %3, 1.400000e+00 18 %5 = fadd double %4, 1.500000e+00 19 %6 = fptosi double %5 to i32 20 %7 = load double, double* %r, align 8 21 %8 = fadd double %7, 7.100000e+00 22 %9 = fmul double %8, 7.200000e+00 23 %10 = fadd double %9, 7.300000e+00 24 %11 = fmul double %10, 7.400000e+00 25 %12 = fadd double %11, 7.500000e+00 26 %13 = fptosi double %12 to i32 27 %14 = icmp slt i32 %6, %13 28 br i1 %14, label %bb, label %return 29 30bb: 31 store double 9.300000e+00, double* %q, align 8 32 ret void 33 34return: 35 ret void 36} 37