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llvm-mirror/test/CodeGen/SystemZ/foldmemop-imm-02.mir
Jonas Paulsson 8975f60913 [SystemZ] Improve foldMemoryOperandImpl() 
A spilled load of an immediate can use MVHI/MVGHI instead.
A compare of a spilled register against an immediate can use CHSI/CGHSI.
A logical compare can use CLFHSI/CLGHSI.

Review: Ulrich Weigand

Differential Revision: https://reviews.llvm.org/D76055
2020-03-25 16:21:08 +01:00

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# RUN: llc -mtriple=s390x-linux-gnu -mcpu=z14 -start-before=greedy %s -o - \
# RUN: | FileCheck %s
#
# Test folding of a memory operand into logical compare with an immediate.
--- |
define i32 @fun0(i32* %src, i32 %arg) { ret i32 0 }
define i64 @fun1(i64* %src, i64 %arg) { ret i64 0 }
define i32 @fun2(i32* %src, i32 %arg) { ret i32 0 }
define i64 @fun3(i64* %src, i64 %arg) { ret i64 0 }
...
# CHECK-LABEL: fun0:
# CHECK: mvhi 164(%r15), 0 # 4-byte Folded Spill
# CHECK: mvc 164(4,%r15), 0(%r2) # 4-byte Folded Spill
# CHECK-LABEL: .LBB0_2:
# CHECK: clfhsi 164(%r15), 2 # 4-byte Folded Reload
---
name: fun0
alignment: 16
tracksRegLiveness: true
registers:
- { id: 0, class: grx32bit }
- { id: 1, class: grx32bit }
- { id: 2, class: addr64bit }
- { id: 3, class: gr32bit }
- { id: 4, class: grx32bit }
- { id: 5, class: grx32bit }
- { id: 6, class: gr32bit }
- { id: 7, class: gr32bit }
- { id: 8, class: grx32bit }
liveins:
- { reg: '$r2d', virtual-reg: '%2' }
- { reg: '$r3l', virtual-reg: '%3' }
frameInfo:
maxAlignment: 1
hasOpaqueSPAdjustment: true
machineFunctionInfo: {}
body: |
bb.0:
successors: %bb.1(0x30000000), %bb.2(0x50000000)
liveins: $r2d, $r3l
%3:gr32bit = COPY $r3l
%2:addr64bit = COPY $r2d
%6:gr32bit = LHIMux 0
CHIMux %3, 0, implicit-def $cc
%8:grx32bit = LHIMux 0
BRC 14, 6, %bb.2, implicit killed $cc
J %bb.1
bb.1:
%8:grx32bit = LMux %2, 0, $noreg :: (load 4 from %ir.src)
INLINEASM &"", 1, 12, implicit-def dead early-clobber $r0d, 12, implicit-def dead early-clobber $r1d, 12, implicit-def dead early-clobber $r2d, 12, implicit-def dead early-clobber $r3d, 12, implicit-def dead early-clobber $r4d, 12, implicit-def dead early-clobber $r5d, 12, implicit-def dead early-clobber $r6d, 12, implicit-def dead early-clobber $r7d, 12, implicit-def dead early-clobber $r8d, 12, implicit-def dead early-clobber $r9d, 12, implicit-def dead early-clobber $r10d, 12, implicit-def dead early-clobber $r11d, 12, implicit-def dead early-clobber $r12d, 12, implicit-def dead early-clobber $r13d, 12, implicit-def dead early-clobber $r14d, 12, implicit-def early-clobber $r15d
bb.2:
INLINEASM &"", 1, 12, implicit-def dead early-clobber $r0d, 12, implicit-def dead early-clobber $r1d, 12, implicit-def dead early-clobber $r2d, 12, implicit-def dead early-clobber $r3d, 12, implicit-def dead early-clobber $r4d, 12, implicit-def dead early-clobber $r5d, 12, implicit-def dead early-clobber $r6d, 12, implicit-def dead early-clobber $r7d, 12, implicit-def dead early-clobber $r8d, 12, implicit-def dead early-clobber $r9d, 12, implicit-def dead early-clobber $r10d, 12, implicit-def dead early-clobber $r11d, 12, implicit-def dead early-clobber $r12d, 12, implicit-def dead early-clobber $r13d, 12, implicit-def dead early-clobber $r14d, 12, implicit-def early-clobber $r15d
CLFIMux %8, 2, implicit-def $cc
%6:gr32bit = LOCHIMux %6, 1, 14, 6, implicit killed $cc
%7:gr32bit = NRK %3, %6, implicit-def dead $cc
$r2l = COPY %7
Return implicit $r2l
...
# CHECK-LABEL: fun1:
# CHECK: mvghi 168(%r15), 0 # 8-byte Folded Spill
# CHECK: mvc 168(8,%r15), 0(%r2) # 8-byte Folded Spill
# CHECK-LABEL: .LBB1_2:
# CHECK: clghsi 168(%r15), 2 # 8-byte Folded Reload
---
name: fun1
alignment: 16
tracksRegLiveness: true
registers:
- { id: 0, class: gr64bit }
- { id: 1, class: gr64bit }
- { id: 2, class: addr64bit }
- { id: 3, class: gr64bit }
- { id: 4, class: gr64bit }
- { id: 5, class: gr64bit }
- { id: 6, class: gr64bit }
- { id: 7, class: gr64bit }
- { id: 8, class: gr64bit }
liveins:
- { reg: '$r2d', virtual-reg: '%2' }
- { reg: '$r3d', virtual-reg: '%3' }
frameInfo:
maxAlignment: 1
hasOpaqueSPAdjustment: true
machineFunctionInfo: {}
body: |
bb.0:
successors: %bb.1(0x30000000), %bb.2(0x50000000)
liveins: $r2d, $r3d
%3:gr64bit = COPY $r3d
%2:addr64bit = COPY $r2d
%6:gr64bit = LGHI 0
CGHI %3, 0, implicit-def $cc
%8:gr64bit = LGHI 0
BRC 14, 6, %bb.2, implicit killed $cc
J %bb.1
bb.1:
%8:gr64bit = LG %2, 0, $noreg :: (load 8 from %ir.src)
INLINEASM &"", 1, 12, implicit-def dead early-clobber $r0d, 12, implicit-def dead early-clobber $r1d, 12, implicit-def dead early-clobber $r2d, 12, implicit-def dead early-clobber $r3d, 12, implicit-def dead early-clobber $r4d, 12, implicit-def dead early-clobber $r5d, 12, implicit-def dead early-clobber $r6d, 12, implicit-def dead early-clobber $r7d, 12, implicit-def dead early-clobber $r8d, 12, implicit-def dead early-clobber $r9d, 12, implicit-def dead early-clobber $r10d, 12, implicit-def dead early-clobber $r11d, 12, implicit-def dead early-clobber $r12d, 12, implicit-def dead early-clobber $r13d, 12, implicit-def dead early-clobber $r14d, 12, implicit-def early-clobber $r15d
bb.2:
INLINEASM &"", 1, 12, implicit-def dead early-clobber $r0d, 12, implicit-def dead early-clobber $r1d, 12, implicit-def dead early-clobber $r2d, 12, implicit-def dead early-clobber $r3d, 12, implicit-def dead early-clobber $r4d, 12, implicit-def dead early-clobber $r5d, 12, implicit-def dead early-clobber $r6d, 12, implicit-def dead early-clobber $r7d, 12, implicit-def dead early-clobber $r8d, 12, implicit-def dead early-clobber $r9d, 12, implicit-def dead early-clobber $r10d, 12, implicit-def dead early-clobber $r11d, 12, implicit-def dead early-clobber $r12d, 12, implicit-def dead early-clobber $r13d, 12, implicit-def dead early-clobber $r14d, 12, implicit-def early-clobber $r15d
CLGFI %8, 2, implicit-def $cc
%6:gr64bit = LOCGHI %6, 1, 14, 6, implicit killed $cc
%7:gr64bit = NGRK %3, %6, implicit-def dead $cc
$r2d = COPY %7
Return implicit $r2d
...
# 17-bit immediate can not be folded
# CHECK-LABEL: fun2:
# CHECK: mvhi 164(%r15), 0 # 4-byte Folded Spill
# CHECK: mvc 164(4,%r15), 0(%r2) # 4-byte Folded Spill
# CHECK-LABEL: .LBB2_2:
# CHECK: l %r0, 164(%r15) # 4-byte Folded Reload
# CHECK: clfi %r0, 65536
---
name: fun2
alignment: 16
tracksRegLiveness: true
registers:
- { id: 0, class: grx32bit }
- { id: 1, class: grx32bit }
- { id: 2, class: addr64bit }
- { id: 3, class: gr32bit }
- { id: 4, class: grx32bit }
- { id: 5, class: grx32bit }
- { id: 6, class: gr32bit }
- { id: 7, class: gr32bit }
- { id: 8, class: grx32bit }
liveins:
- { reg: '$r2d', virtual-reg: '%2' }
- { reg: '$r3l', virtual-reg: '%3' }
frameInfo:
maxAlignment: 1
hasOpaqueSPAdjustment: true
machineFunctionInfo: {}
body: |
bb.0:
successors: %bb.1(0x30000000), %bb.2(0x50000000)
liveins: $r2d, $r3l
%3:gr32bit = COPY $r3l
%2:addr64bit = COPY $r2d
%6:gr32bit = LHIMux 0
CHIMux %3, 0, implicit-def $cc
%8:grx32bit = LHIMux 0
BRC 14, 6, %bb.2, implicit killed $cc
J %bb.1
bb.1:
%8:grx32bit = LMux %2, 0, $noreg :: (load 4 from %ir.src)
INLINEASM &"", 1, 12, implicit-def dead early-clobber $r0d, 12, implicit-def dead early-clobber $r1d, 12, implicit-def dead early-clobber $r2d, 12, implicit-def dead early-clobber $r3d, 12, implicit-def dead early-clobber $r4d, 12, implicit-def dead early-clobber $r5d, 12, implicit-def dead early-clobber $r6d, 12, implicit-def dead early-clobber $r7d, 12, implicit-def dead early-clobber $r8d, 12, implicit-def dead early-clobber $r9d, 12, implicit-def dead early-clobber $r10d, 12, implicit-def dead early-clobber $r11d, 12, implicit-def dead early-clobber $r12d, 12, implicit-def dead early-clobber $r13d, 12, implicit-def dead early-clobber $r14d, 12, implicit-def early-clobber $r15d
bb.2:
INLINEASM &"", 1, 12, implicit-def dead early-clobber $r0d, 12, implicit-def dead early-clobber $r1d, 12, implicit-def dead early-clobber $r2d, 12, implicit-def dead early-clobber $r3d, 12, implicit-def dead early-clobber $r4d, 12, implicit-def dead early-clobber $r5d, 12, implicit-def dead early-clobber $r6d, 12, implicit-def dead early-clobber $r7d, 12, implicit-def dead early-clobber $r8d, 12, implicit-def dead early-clobber $r9d, 12, implicit-def dead early-clobber $r10d, 12, implicit-def dead early-clobber $r11d, 12, implicit-def dead early-clobber $r12d, 12, implicit-def dead early-clobber $r13d, 12, implicit-def dead early-clobber $r14d, 12, implicit-def early-clobber $r15d
CLFIMux %8, 65536, implicit-def $cc
%6:gr32bit = LOCHIMux %6, 1, 14, 6, implicit killed $cc
%7:gr32bit = NRK %3, %6, implicit-def dead $cc
$r2l = COPY %7
Return implicit $r2l
...
# 17-bit immediate can not be folded
# CHECK-LABEL: fun3:
# CHECK: mvghi 168(%r15), 0 # 8-byte Folded Spill
# CHECK: mvc 168(8,%r15), 0(%r2) # 8-byte Folded Spill
# CHECK-LABEL: .LBB3_2:
# CHECK: lg %r0, 168(%r15) # 8-byte Folded Reload
# CHECK: clgfi %r0, 65536
---
name: fun3
alignment: 16
tracksRegLiveness: true
registers:
- { id: 0, class: gr64bit }
- { id: 1, class: gr64bit }
- { id: 2, class: addr64bit }
- { id: 3, class: gr64bit }
- { id: 4, class: gr64bit }
- { id: 5, class: gr64bit }
- { id: 6, class: gr64bit }
- { id: 7, class: gr64bit }
- { id: 8, class: gr64bit }
liveins:
- { reg: '$r2d', virtual-reg: '%2' }
- { reg: '$r3d', virtual-reg: '%3' }
frameInfo:
maxAlignment: 1
hasOpaqueSPAdjustment: true
machineFunctionInfo: {}
body: |
bb.0:
successors: %bb.1(0x30000000), %bb.2(0x50000000)
liveins: $r2d, $r3d
%3:gr64bit = COPY $r3d
%2:addr64bit = COPY $r2d
%6:gr64bit = LGHI 0
CGHI %3, 0, implicit-def $cc
%8:gr64bit = LGHI 0
BRC 14, 6, %bb.2, implicit killed $cc
J %bb.1
bb.1:
%8:gr64bit = LG %2, 0, $noreg :: (load 8 from %ir.src)
INLINEASM &"", 1, 12, implicit-def dead early-clobber $r0d, 12, implicit-def dead early-clobber $r1d, 12, implicit-def dead early-clobber $r2d, 12, implicit-def dead early-clobber $r3d, 12, implicit-def dead early-clobber $r4d, 12, implicit-def dead early-clobber $r5d, 12, implicit-def dead early-clobber $r6d, 12, implicit-def dead early-clobber $r7d, 12, implicit-def dead early-clobber $r8d, 12, implicit-def dead early-clobber $r9d, 12, implicit-def dead early-clobber $r10d, 12, implicit-def dead early-clobber $r11d, 12, implicit-def dead early-clobber $r12d, 12, implicit-def dead early-clobber $r13d, 12, implicit-def dead early-clobber $r14d, 12, implicit-def early-clobber $r15d
bb.2:
INLINEASM &"", 1, 12, implicit-def dead early-clobber $r0d, 12, implicit-def dead early-clobber $r1d, 12, implicit-def dead early-clobber $r2d, 12, implicit-def dead early-clobber $r3d, 12, implicit-def dead early-clobber $r4d, 12, implicit-def dead early-clobber $r5d, 12, implicit-def dead early-clobber $r6d, 12, implicit-def dead early-clobber $r7d, 12, implicit-def dead early-clobber $r8d, 12, implicit-def dead early-clobber $r9d, 12, implicit-def dead early-clobber $r10d, 12, implicit-def dead early-clobber $r11d, 12, implicit-def dead early-clobber $r12d, 12, implicit-def dead early-clobber $r13d, 12, implicit-def dead early-clobber $r14d, 12, implicit-def early-clobber $r15d
CLGFI %8, 65536, implicit-def $cc
%6:gr64bit = LOCGHI %6, 1, 14, 6, implicit killed $cc
%7:gr64bit = NGRK %3, %6, implicit-def dead $cc
$r2d = COPY %7
Return implicit $r2d
...
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