[PATCH] D41463: [CodeGen] Add a new pass for PostRA sink

[Sebastian Pop via Phabricator via llvm-commits]

sebpop added a comment.

Krzysztof, here is the assembly before this patch:

  f1:                                     // @f1
  // %bb.0:                               // %b0
          {
                          p0 = cmp.gtu(r0,#3); if (p0.new) jump:nt .LBB0_2
                          r2 = r0
          }
  // %bb.1:                               // %b2
          {
                          r0 = +mpyi(r1,#7)
                          r1 = #0
                          jumpr r31
          }
  .LBB0_2:                                // %b1
          {
                          call f0
                          r1:0 = combine(r2,##g0)
                          allocframe(r29,#0):raw
          }

after the patch:

  f1:                                     // @f1
  // %bb.0:                               // %b0
          {
                          p0 = cmp.gtu(r0,#3); if (p0.new) jump:nt .LBB0_2
          }
  // %bb.1:                               // %b2
          {
                          r0 = +mpyi(r1,#7)
                          r1 = #0
                          jumpr r31
          }
  .LBB0_2:                                // %b1
          {
                          r2 = r0
                          allocframe(#0)
          }
          {
                          call f0
                          r1:0 = combine(r2,##g0)
          }


https://reviews.llvm.org/D41463