llvm/test/CodeGen/PowerPC/mi-simplify-code.mir

# RUN: llc -mtriple powerpc64le-unknown-linux-gnu -mcpu=pwr8 -x mir < %s \
# RUN:   -verify-machineinstrs -start-before=ppc-mi-peepholes | FileCheck %s

---
name: remove_frsp
alignment:       16
tracksRegLiveness: true
body:             |
  bb.0.entry:
    liveins: $x3, $x4

    %1:g8rc = COPY $x4
    %0:g8rc_and_g8rc_nox0 = COPY $x3
    %2:g8rc = RLDICR %1, 2, 61
    %3:f8rc, %4:g8rc_and_g8rc_nox0 = LFSUX %0, killed %2
    %5:f4rc = FRSP killed %3, implicit $rm
    %22:vslrc = SUBREG_TO_REG %5, %subreg.sub_64
    %7:g8rc = LI8 8
    %8:vssrc = XFLOADf32 %4, killed %7
    %23:vslrc = SUBREG_TO_REG %8, %subreg.sub_64
    %10:vsrc = XXPERMDI %23, %22, 0
    %11:vrrc = XVCVDPSP killed %10, implicit $rm
    $v2 = COPY %11
    BLR8 implicit $lr8, implicit $rm, implicit $v2
...
# CHECK-LABEL: remove_frsp
# CHECK: sldi 4, 4, 2
# CHECK-NEXT: lfsux 0, 3, 4
# CHECK-NOT: frsp
# CHECK-NEXT: lfs 1, 8(3)
# CHECK-NEXT: xxmrghd	0, 1, 0
# CHECK-NEXT: xvcvdpsp 34, 0
# CHECK-NEXT: blr

---
name: remove_xsrsp
tracksRegLiveness: true
body:             |
  bb.0.entry:
    liveins: $x3, $x4

    %1:g8rc = COPY $x4
    %0:g8rc_and_g8rc_nox0 = COPY $x3
    %2:g8rc = RLDICR %1, 2, 61
    %3:f8rc, %4:g8rc_and_g8rc_nox0 = LFSUX %0, killed %2
    %5:vssrc = XSRSP killed %3
    %22:vslrc = SUBREG_TO_REG %5, %subreg.sub_64
    %7:g8rc = LI8 8
    %8:vssrc = XFLOADf32 %4, killed %7
    %23:vslrc = SUBREG_TO_REG %8, %subreg.sub_64
    %10:vsrc = XXPERMDI %23, %22, 0
    %11:vrrc = XVCVDPSP killed %10, implicit $rm
    $v2 = COPY %11
    BLR8 implicit $lr8, implicit $rm, implicit $v2
...
# CHECK-LABEL: remove_xsrsp
# CHECK: sldi 4, 4, 2
# CHECK-NEXT: lfsux 0, 3, 4
# CHECK-NOT: xsrsp
# CHECK-NEXT: lfs 1, 8(3)
# CHECK-NEXT: xxmrghd	0, 1, 0
# CHECK-NEXT: xvcvdpsp 34, 0
# CHECK-NEXT: blr