llvm/test/CodeGen/SystemZ/shorten-fused-fp-ops.mir

# RUN: llc -mtriple=s390x-linux-gnu -mcpu=z14 -start-before=postrapseudos %s -o - \
# RUN:   | FileCheck %s
#
# Test shortening of fused fp operations.

--- |
  define double @fun0(double %f1, double %f2, double %acc) { ret double 0.0 }
...

# CHECK-LABEL: fun0:
# CHECK:      madbr   %f0, %f4, %f2
# CHECK-NEXT: wfmadb  %f0, %f4, %v16, %f0
# CHECK-NEXT: wfmadb  %f0, %f4, %f0, %f2
# CHECK-NEXT: maebr   %f0, %f4, %f2
# CHECK-NEXT: wfmasb  %f0, %f4, %v16, %f0
# CHECK-NEXT: wfmasb  %f0, %f4, %f0, %f2
# CHECK-NEXT: msdbr   %f0, %f4, %f2
# CHECK-NEXT: wfmsdb  %f0, %f4, %v16, %f0
# CHECK-NEXT: wfmsdb  %f0, %f4, %f0, %f2
# CHECK-NEXT: msebr   %f0, %f4, %f2
# CHECK-NEXT: wfmssb  %f0, %f4, %v16, %f0
# CHECK-NEXT: wfmssb  %f0, %f4, %f0, %f2
# CHECK-NEXT: br      %r14
---
name:            fun0
alignment:       16
tracksRegLiveness: true
liveins:
  - { reg: '$f0d' }
  - { reg: '$f2d' }
  - { reg: '$f4d' }
frameInfo:
  maxAlignment:    1
  maxCallFrameSize: 0
fixedStack:
  - { id: 0, offset: -160, size: 8, alignment: 8 }
machineFunctionInfo: {}
body:             |
  bb.0 (%ir-block.0):
    liveins: $f0d, $f2d, $f4d, $f16d
  
    renamable $f0d = nofpexcept WFMADB renamable $f4d, renamable $f2d, renamable $f0d, implicit $fpc
    renamable $f0d = nofpexcept WFMADB renamable $f4d, renamable $f16d, renamable $f0d, implicit $fpc
    renamable $f0d = nofpexcept WFMADB renamable $f4d, renamable $f0d, renamable $f2d, implicit $fpc

    renamable $f0s = nofpexcept WFMASB renamable $f4s, renamable $f2s, renamable $f0s, implicit $fpc
    renamable $f0s = nofpexcept WFMASB renamable $f4s, renamable $f16s, renamable $f0s, implicit $fpc
    renamable $f0s = nofpexcept WFMASB renamable $f4s, renamable $f0s, renamable $f2s, implicit $fpc

    renamable $f0d = nofpexcept WFMSDB renamable $f4d, renamable $f2d, renamable $f0d, implicit $fpc
    renamable $f0d = nofpexcept WFMSDB renamable $f4d, renamable $f16d, renamable $f0d, implicit $fpc
    renamable $f0d = nofpexcept WFMSDB renamable $f4d, renamable $f0d, renamable $f2d, implicit $fpc

    renamable $f0s = nofpexcept WFMSSB renamable $f4s, renamable $f2s, renamable $f0s, implicit $fpc
    renamable $f0s = nofpexcept WFMSSB renamable $f4s, renamable $f16s, renamable $f0s, implicit $fpc
    renamable $f0s = nofpexcept WFMSSB renamable $f4s, renamable $f0s, renamable $f2s, implicit $fpc

    Return implicit $f0d

...