llvm/test/CodeGen/PowerPC/fold-frame-offset-using-rr.mir

# RUN: llc -mtriple=powerpc64le--linux-gnu -stop-after ppc-pre-emit-peephole %s -o - -verify-machineinstrs | FileCheck %s

# ADDI instr: ToBeChangedReg = ADDI FrameBaseReg, OffsetAddi
# ADD instr:  ToBeDeletedReg = ADD ToBeChangedReg(killed), ScaleReg
# Imm instr:  Reg            = op OffsetImm, ToBeDeletedReg(killed)
# 
# can be folded to:
#
# new ADDI instr: ToBeChangedReg = ADDI FrameBaseReg, (OffsetAddi + OffsetImm)
# Index instr:    Reg            = opx ScaleReg, ToBeChangedReg(killed)

---
name: testIndexForm1
#CHECK: name: testIndexForm1
# ToBeDeletedReg equals to ScaleReg
tracksRegLiveness: true
body: |
  bb.0.entry:
    liveins: $x3, $x1, $x4, $x6
    $x3 = ADDI8 $x1, -80
    ; CHECK: $x3 = ADDI8 $x1, -76
    $x4 = ADD8 killed $x3, killed $x4
    ; CHECK-NOT: ADD8
    $x6 = LD 4, killed $x4
    ; CHECK: $x6 = LDX killed $x4, killed $x3
    BLR8 implicit $lr8, implicit $rm
...
---
name: testIndexForm2
#CHECK: name: testIndexForm2
# ToBeDeletedReg equals to ToBeChangedReg
tracksRegLiveness: true
body: |
  bb.0.entry:
    liveins: $x3, $x1, $x4, $x6
    $x3 = ADDI8 $x1, -80
    ; CHECK: $x3 = ADDI8 $x1, -76
    $x3 = ADD8 killed $x3, killed $x4
    ; CHECK-NOT: ADD8
    $x6 = LD 4, killed $x3
    ; CHECK: $x6 = LDX killed $x4, killed $x3
    BLR8 implicit $lr8, implicit $rm
...
---
name: testIndexForm3
#CHECK: name: testIndexForm3
# There is other use for ToBeDeletedReg between ADD instr and Imm instr
tracksRegLiveness: true
body: |
  bb.0.entry:
    liveins: $x3, $x1, $x4, $x6
    $x3 = ADDI8 $x1, -80
    ; CHECK: $x3 = ADDI8 $x1, -80
    $x3 = ADD8 killed $x3, killed $x4
    ; CHECK: $x3 = ADD8 killed $x3, killed $x4
    STD $x3, killed $x6, 100
    ; CHECK: STD $x3, killed $x6, 100
    $x6 = LD 4, killed $x3
    ; CHECK: $x6 = LD 4, killed $x3
    BLR8 implicit $lr8, implicit $rm
...
---
name: testIndexForm4
#CHECK: name: testIndexForm4
# There is other use for ToBeChangedReg between ADDI instr and ADD instr
tracksRegLiveness: true
body: |
  bb.0.entry:
    liveins: $x3, $x1, $x4, $x6
    $x3 = ADDI8 $x1, -80
    ; CHECK: $x3 = ADDI8 $x1, -80
    STD $x3, killed $x6, 100
    ; CHECK: STD $x3, killed $x6, 100
    $x3 = ADD8 killed $x3, killed $x4
    ; CHECK: $x3 = ADD8 killed $x3, killed $x4
    $x6 = LD 4, killed $x3
    ; CHECK: $x6 = LD 4, killed $x3
    BLR8 implicit $lr8, implicit $rm
...
---
name: testIndexForm5
#CHECK: name: testIndexForm5
# ToBeChangedReg has no killed flag
tracksRegLiveness: true
body: |
  bb.0.entry:
    liveins: $x3, $x1, $x4, $x6
    $x3 = ADDI8 $x1, -80
    ; CHECK: $x3 = ADDI8 $x1, -80
    $x4 = ADD8 $x3, killed $x4
    ; CHECK: $x4 = ADD8 $x3, killed $x4
    STD killed $x3, killed $x6, 100
    ; CHECK: STD killed $x3, killed $x6, 100
    $x6 = LD 4, killed $x4
    ; CHECK: $x6 = LD 4, killed $x4
    BLR8 implicit $lr8, implicit $rm
...
---
name: testIndexForm6
#CHECK: name: testIndexForm6
# ToBeDeletedReg has no killed flag
tracksRegLiveness: true
body: |
  bb.0.entry:
    liveins: $x3, $x1, $x4, $x6
    $x3 = ADDI8 $x1, -80
    ; CHECK: $x3 = ADDI8 $x1, -80
    $x4 = ADD8 killed $x3, killed $x4
    ; CHECK: $x4 = ADD8 killed $x3, killed $x4
    $x6 = LD 4, $x4
    ; CHECK: $x6 = LD 4, $x4
    STD killed $x4, killed $x6, 100
    BLR8 implicit $lr8, implicit $rm
...
---
name: testIndexForm7
#CHECK: name: testIndexForm7
# There is other def for ToBeChangedReg between ADD instr and Imm instr
tracksRegLiveness: true
body: |
  bb.0.entry:
    liveins: $x3, $x1, $x4, $x5, $x6
    $x3 = ADDI8 $x1, -80
    ; CHECK: $x3 = ADDI8 $x1, -80
    $x4 = ADD8 killed $x3, killed $x5
    ; CHECK: $x4 = ADD8 killed $x3, killed $x5
    $x3 = LD 100, $x6
    ; CHECK: $x3 = LD 100, $x6
    STD killed $x3, killed $x6, 200
    ; CHECK: STD killed $x3, killed $x6, 200
    $x6 = LD 4, killed $x4
    ; CHECK: $x6 = LD 4, killed $x4
    BLR8 implicit $lr8, implicit $rm
...
---
name: testIndexForm8
#CHECK: name: testIndexForm8
# There is other def for ScaleReg between ADD instr and Imm instr
tracksRegLiveness: true
body: |
  bb.0.entry:
    liveins: $x3, $x1, $x4, $x5, $x6
    $x3 = ADDI8 $x1, -80
    ; CHECK: $x3 = ADDI8 $x1, -80
    $x4 = ADD8 killed $x3, killed $x5
    ; CHECK: $x4 = ADD8 killed $x3, killed $x5
    $x5 = LD 100, $x6
    ; CHECK: $x5 = LD 100, $x6
    STD killed $x5, killed $x6, 200
    ; CHECK: STD killed $x5, killed $x6, 200
    $x6 = LD 4, killed $x4
    ; CHECK: $x6 = LD 4, killed $x4
    BLR8 implicit $lr8, implicit $rm
...
---
name: testR0
#CHECK: name: testR0
# Give up the folding if the register is R0/X0
tracksRegLiveness: true
body:             |
  bb.0.entry:
    liveins: $f1, $x0, $x3
    $x4 = ADDI8 killed $x3, -8
    $x4 = ADD8 killed $x4, $x0
    STFD killed $f1, -8, killed $x4
    ; CHECK-NOT: STFDX
    BLR8 implicit $lr8, implicit $rm
...