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llvm-project/llvm/test/CodeGen/SystemZ/foldmemop-imm-02.mir
Jonas Paulsson f541a5048a [SystemZ] Implement orderFrameObjects(). 
By reordering the objects on the stack frame after looking at the users, a
better utilization of displacement operands will result. This means less
needed Load Address instructions for the accessing of these objects.

This is important for very large functions where otherwise small changes
could cause a lot more/less accesses go out of range.

Note: this is not yet enabled for SystemZXPLINKFrameLowering, but should be.

Review: Ulrich Weigand

Differential Revision: https://reviews.llvm.org/D115690
2022-01-27 16:09:19 -06:00

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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 160(%r15), 0 # 4-byte Folded Spill
# CHECK: mvc 160(4,%r15), 0(%r2) # 4-byte Folded Spill
# CHECK-LABEL: .LBB0_2:
# CHECK: clfhsi 160(%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 (s32) 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 $r2l
...
# CHECK-LABEL: fun1:
# CHECK: mvghi 160(%r15), 0 # 8-byte Folded Spill
# CHECK: mvc 160(8,%r15), 0(%r2) # 8-byte Folded Spill
# CHECK-LABEL: .LBB1_2:
# CHECK: clghsi 160(%r15), 2 # 8-byte Folded Reload
---
name: fun1
alignment: 16
tracksRegLiveness: true
registers:
- { id: 0, class: gr64bit }
- { id: 1, class: gr64bit }
- { id: 2, class: addr64bit }
- { id: 3, class: gr64bit }
- { id: 4, class: gr64bit }
- { id: 5, class: gr64bit }
- { id: 6, class: gr64bit }
- { id: 7, class: gr64bit }
- { id: 8, class: gr64bit }
liveins:
- { reg: '$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 (s64) 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 $r2d
...
# 17-bit immediate can not be folded
# CHECK-LABEL: fun2:
# CHECK: mvhi 160(%r15), 0 # 4-byte Folded Spill
# CHECK: mvc 160(4,%r15), 0(%r2) # 4-byte Folded Spill
# CHECK-LABEL: .LBB2_2:
# CHECK: l %r0, 160(%r15) # 4-byte Folded Reload
# CHECK: clfi %r0, 65536
---
name: fun2
alignment: 16
tracksRegLiveness: true
registers:
- { id: 0, class: grx32bit }
- { id: 1, class: grx32bit }
- { id: 2, class: addr64bit }
- { id: 3, class: gr32bit }
- { id: 4, class: grx32bit }
- { id: 5, class: grx32bit }
- { id: 6, class: gr32bit }
- { id: 7, class: gr32bit }
- { id: 8, class: grx32bit }
liveins:
- { reg: '$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 (s32) 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 $r2l
...
# 17-bit immediate can not be folded
# CHECK-LABEL: fun3:
# CHECK: mvghi 160(%r15), 0 # 8-byte Folded Spill
# CHECK: mvc 160(8,%r15), 0(%r2) # 8-byte Folded Spill
# CHECK-LABEL: .LBB3_2:
# CHECK: lg %r0, 160(%r15) # 8-byte Folded Reload
# CHECK: clgfi %r0, 65536
---
name: fun3
alignment: 16
tracksRegLiveness: true
registers:
- { id: 0, class: gr64bit }
- { id: 1, class: gr64bit }
- { id: 2, class: addr64bit }
- { id: 3, class: gr64bit }
- { id: 4, class: gr64bit }
- { id: 5, class: gr64bit }
- { id: 6, class: gr64bit }
- { id: 7, class: gr64bit }
- { id: 8, class: gr64bit }
liveins:
- { reg: '$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 (s64) 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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