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| # RUN: llc -mtriple=aarch64-none-linux-gnu -run-pass=prologepilog %s -o - | FileCheck %s
#
# Test allocation and deallocation of SVE objects on the stack,
# as well as using a combination of scalable and non-scalable
# offsets to access the SVE on the stack.
#
# SVE objects are allocated below the (scalar) callee saves,
# and above spills/locals and the alignment gap, e.g.
#
# +-------------+
# | stack arg |
# +-------------+ <- SP before call
# | Callee Saves|
# | Frame record| (if available)
# |-------------| <- FP (if available)
# | SVE area |
# +-------------+
# |/////////////| alignment gap.
# | : |
# | Stack objs |
# | : |
# +-------------+ <- SP after call and frame-setup
#
--- |
define void @test_allocate_sve() nounwind { entry: unreachable }
define void @test_allocate_sve_gpr_callee_saves() nounwind { entry: unreachable }
define void @test_allocate_sve_gpr_realigned() nounwind { entry: unreachable }
define void @test_address_sve() nounwind { entry: unreachable }
define void @test_address_sve_fp() nounwind { entry: unreachable }
define void @test_stack_arg_sve() nounwind { entry: unreachable }
define void @test_address_sve_out_of_range() nounwind { entry: unreachable }
...
# +----------+
# |scratchreg| // x29 is used as scratch reg.
# +----------+
# | %fixed- | // scalable SVE object of n * 18 bytes, aligned to 16 bytes,
# | stack.0 | // to be materialized with 2*ADDVL (<=> 2 * n * 16bytes)
# +----------+
# | %stack.0 | // not scalable
# +----------+ <- SP
# CHECK-LABEL: name: test_allocate_sve
# CHECK: stackSize: 32
# CHECK: bb.0.entry:
# CHECK-NEXT: $sp = frame-setup STRXpre killed $[[SCRATCH:[a-z0-9]+]], $sp, -16
# CHECK-NEXT: $sp = frame-setup ADDVL_XXI $sp, -2
# CHECK-NEXT: $sp = frame-setup SUBXri $sp, 16, 0
# CHECK-NEXT: $sp = frame-destroy ADDVL_XXI $sp, 2
# CHECK-NEXT: $sp = frame-destroy ADDXri $sp, 16, 0
# CHECK-NEXT: $sp, $[[SCRATCH]] = frame-destroy LDRXpost $sp, 16
# CHECK-NEXT: RET_ReallyLR
name: test_allocate_sve
fixedStack:
- { id: 0, stack-id: sve-vec, size: 18, alignment: 2, offset: -18 }
stack:
- { id: 0, stack-id: default, size: 16, alignment: 8 }
body: |
bb.0.entry:
RET_ReallyLR
---
...
# +----------+
# | x20, x21 | // callee saves
# |scratchreg| // x29 is used as scratch reg.
# +----------+
# | %fixed- | // scalable objects
# | stack.0 |
# +----------+
# | %stack.0 | // not scalable
# +----------+ <- SP
# CHECK-LABEL: name: test_allocate_sve_gpr_callee_saves
# CHECK: stackSize: 48
# CHECK: bb.0.entry:
# CHECK-NEXT: $sp = frame-setup STRXpre killed $[[SCRATCH:[a-z0-9]+]], $sp, -32
# CHECK-NEXT: frame-setup STPXi killed $x21, killed $x20, $sp, 2
# CHECK-NEXT: $sp = frame-setup ADDVL_XXI $sp, -2
# CHECK-NEXT: $sp = frame-setup SUBXri $sp, 16, 0
# CHECK-NEXT: $x20 = IMPLICIT_DEF
# CHECK-NEXT: $x21 = IMPLICIT_DEF
# CHECK-NEXT: $sp = frame-destroy ADDVL_XXI $sp, 2
# CHECK-NEXT: $sp = frame-destroy ADDXri $sp, 16, 0
# CHECK-NEXT: $x21, $x20 = frame-destroy LDPXi $sp, 2
# CHECK-NEXT: $sp, $[[SCRATCH]] = frame-destroy LDRXpost $sp, 32
# CHECK-NEXT: RET_ReallyLR
name: test_allocate_sve_gpr_callee_saves
fixedStack:
- { id: 0, stack-id: sve-vec, size: 18, alignment: 2, offset: -18 }
stack:
- { id: 0, stack-id: default, size: 16, alignment: 8 }
body: |
bb.0.entry:
$x20 = IMPLICIT_DEF
$x21 = IMPLICIT_DEF
RET_ReallyLR
---
...
# +----------+
# | lr, fp | // frame record
# +----------+ <- FP
# | %fixed- | // scalable objects
# | stack.0 |
# +----------+
# |//////////| // alignment gap
# | %stack.0 | // not scalable
# +----------+ <- SP
# CHECK-LABEL: name: test_allocate_sve_gpr_realigned
# CHECK: stackSize: 32
# CHECK: bb.0.entry:
# CHECK-NEXT: $sp = frame-setup STPXpre killed $fp, killed $lr, $sp, -2
# CHECK-NEXT: $fp = frame-setup ADDXri $sp, 0, 0
# CHECK-NEXT: $sp = frame-setup ADDVL_XXI $sp, -2
# CHECK-NEXT: $[[TMP:x[0-9]+]] = frame-setup SUBXri $sp, 16, 0
# CHECK-NEXT: $sp = ANDXri killed $[[TMP]]
# CHECK-NEXT: $sp = frame-destroy ADDXri $fp, 0, 0
# CHECK-NEXT: $sp, $fp, $lr = frame-destroy LDPXpost $sp, 2
# CHECK-NEXT: RET_ReallyLR
name: test_allocate_sve_gpr_realigned
fixedStack:
- { id: 0, stack-id: sve-vec, size: 18, alignment: 2, offset: -18 }
stack:
- { id: 0, stack-id: default, size: 16, alignment: 32 }
body: |
bb.0.entry:
RET_ReallyLR
---
...
# +----------+
# | x20, x21 | // callee saves
# +----------+
# | %stack.0 | // scalable @ SP + 16b + 32 scalable bytes
# | %stack.1 | // scalable @ SP + 16b + 16 scalable bytes
# | %stack.2 | // scalable @ SP + 16b + 14 scalable bytes
# +----------+
# | %stack.0 | // not scalable
# +----------+ <- SP
# CHECK-LABEL: name: test_address_sve
# CHECK: stackSize: 32
# CHECK: bb.0.entry:
# CHECK-NEXT: $sp = frame-setup STRXpre killed $[[SCRATCH:[a-z0-9]+]], $sp, -16
# CHECK-NEXT: $sp = frame-setup ADDVL_XXI $sp, -3
# CHECK-NEXT: $sp = frame-setup SUBXri $sp, 16, 0
# CHECK-NEXT: $[[TMP:x[0-9]+]] = ADDXri $sp, 16
# CHECK-NEXT: STR_ZXI $z0, killed $[[TMP]], 2
# CHECK-NEXT: $[[TMP:x[0-9]+]] = ADDXri $sp, 16
# CHECK-NEXT: STR_ZXI $z1, killed $[[TMP]], 1
# CHECK-NEXT: $[[TMP:x[0-9]+]] = ADDXri $sp, 16
# CHECK-NEXT: STR_PXI $p0, killed $[[TMP]], 7
# CHECK-NEXT: $sp = frame-destroy ADDVL_XXI $sp, 3
# CHECK-NEXT: $sp = frame-destroy ADDXri $sp, 16, 0
# CHECK-NEXT: $sp, $[[SCRATCH]] = frame-destroy LDRXpost $sp, 16
# CHECK-NEXT: RET_ReallyLR
name: test_address_sve
frameInfo:
maxAlignment: 16
fixedStack:
- { id: 0, stack-id: sve-vec, size: 16, alignment: 8, offset: -16 }
- { id: 1, stack-id: sve-vec, size: 16, alignment: 8, offset: -32 }
- { id: 2, stack-id: sve-vec, size: 2, alignment: 2, offset: -34 }
stack:
- { id: 0, stack-id: default, size: 16, alignment: 8 }
body: |
bb.0.entry:
liveins: $z0, $z1, $p0
STR_ZXI $z0, %fixed-stack.0, 0
STR_ZXI $z1, %fixed-stack.1, 0
STR_PXI $p0, %fixed-stack.2, 0
RET_ReallyLR
---
...
# +-----------+
# | x20, x21 | // callee saves
# | lr, fp | // frame record
# +-----------+ <- FP
# | %fstack.0 | // scalable @ FP - 16 scalable bytes
# | %fstack.1 | // scalable @ FP - 32 scalable bytes
# | %fstack.2 | // scalable @ FP - 34 scalable bytes
# +-----------+
# | %stack.0 | // not scalable
# +-----------+ <- SP
# CHECK-LABEL: name: test_address_sve_fp
# CHECK: stackSize: 32
# CHECK: bb.0.entry:
# CHECK-NEXT: $sp = frame-setup STPXpre killed $fp, killed $lr, $sp, -2
# CHECK-NEXT: $fp = frame-setup ADDXri $sp, 0, 0
# CHECK-NEXT: $sp = frame-setup ADDVL_XXI $sp, -3
# CHECK-NEXT: $sp = frame-setup SUBXri $sp, 16, 0
# CHECK-NEXT: STR_ZXI $z0, $fp, -1
# CHECK-NEXT: STR_ZXI $z1, $fp, -2
# CHECK-NEXT: STR_PXI $p0, $fp, -17
# CHECK-NEXT: $sp = frame-destroy ADDVL_XXI $sp, 3
# CHECK: $sp = frame-destroy ADDXri $sp, 16, 0
# CHECK-NEXT: $sp, $fp, $lr = frame-destroy LDPXpost $sp, 2
# CHECK-NEXT: RET_ReallyLR
name: test_address_sve_fp
frameInfo:
maxAlignment: 16
isFrameAddressTaken: true
fixedStack:
- { id: 0, stack-id: sve-vec, size: 16, alignment: 8, offset: -16 }
- { id: 1, stack-id: sve-vec, size: 16, alignment: 8, offset: -32 }
- { id: 2, stack-id: sve-vec, size: 2, alignment: 2, offset: -34 }
stack:
- { id: 0, stack-id: default, size: 16, alignment: 8 }
body: |
bb.0.entry:
liveins: $z0, $z1, $p0
STR_ZXI $z0, %fixed-stack.0, 0
STR_ZXI $z1, %fixed-stack.1, 0
STR_PXI $p0, %fixed-stack.2, 0
RET_ReallyLR
---
...
# +-----------+
# | %fstack.1 | // stack arg @ SP + 16 scalable bytes + 32 bytes.
# +-----------+
# |callee save| // register saved as scratch reg.
# +-----------+
# | %fstack.1 | // vector of 16 scalable bytes
# +---------- +
# | %stack.0 | // not scalable, 16 bytes
# +-----------+ <- SP
# CHECK-LABEL: name: test_stack_arg_sve
# CHECK: stackSize: 32
# CHECK: bb.0.entry:
# CHECK-NEXT: $sp = frame-setup STRXpre killed $[[SCRATCH:[a-z0-9]+]], $sp, -16
# CHECK-NEXT: $sp = frame-setup ADDVL_XXI $sp, -1
# CHECK-NEXT: $sp = frame-setup SUBXri $sp, 16, 0
# CHECK: $[[TMP:x[0-9]+]] = ADDVL_XXI $sp, 1
# CHECK-NEXT: $x0 = LDRXui killed $[[TMP]], 4
# CHECK-NEXT: $sp = frame-destroy ADDVL_XXI $sp, 1
# CHECK-NEXT: $sp = frame-destroy ADDXri $sp, 16, 0
# CHECK-NEXT: $sp, $[[SCRATCH]] = frame-destroy LDRXpost $sp, 16
# CHECK-NEXT: RET_ReallyLR
name: test_stack_arg_sve
fixedStack:
- { id: 0, stack-id: default, size: 16, alignment: 16, offset: 0 }
- { id: 1, stack-id: sve-vec, size: 16, alignment: 16, offset: -16 }
stack:
- { id: 0, stack-id: default, size: 16, alignment: 16 }
body: |
bb.0.entry:
liveins: $x0
$x0 = LDRXui %fixed-stack.0, 0
RET_ReallyLR
---
...
# Test that the address to access an SVE data vector at an offset that
# does not fit its immediate, is correctly materialized.
# +----------+
# |calleesave| // register saved as scratch reg.
# +----------+
# | %stack.0 | // one SVE data object @ SP + 256 scalable bytes.
# |::::::::::|
# |: :|
# |:%stack.1:| // Large object
# |: :|
# |::::::::::|
# +----------+ <- SP
# CHECK-LABEL: name: test_address_sve_out_of_range
# CHECK: stackSize: 16
# CHECK: bb.0.entry:
# CHECK-NEXT: $sp = frame-setup STRXpre killed $[[SCRATCH:[a-z0-9]+]], $sp, -16
# CHECK-NEXT: $sp = frame-setup ADDVL_XXI $sp, -32
# CHECK-NEXT: $sp = frame-setup ADDVL_XXI $sp, -32
# CHECK-NEXT: $sp = frame-setup ADDVL_XXI $sp, -32
# CHECK-NEXT: $sp = frame-setup ADDVL_XXI $sp, -32
# CHECK-NEXT: $sp = frame-setup ADDVL_XXI $sp, -32
# CHECK-NEXT: $sp = frame-setup ADDVL_XXI $sp, -32
# CHECK-NEXT: $sp = frame-setup ADDVL_XXI $sp, -32
# CHECK-NEXT: $sp = frame-setup ADDVL_XXI $sp, -32
# CHECK-NEXT: $sp = frame-setup ADDVL_XXI $sp, -1
# CHECK-NEXT: $[[TMP2:x[0-9]+]] = ADDVL_XXI $sp, 1
# CHECK-NEXT: STR_ZXI $z0, killed $[[TMP2]], 255
# CHECK-NEXT: $[[TMP2:x[0-9]+]] = ADDPL_XXI $sp, 1
# CHECK-NEXT: STR_PXI $p0, killed $[[TMP2]], 255
# CHECK: $sp = frame-destroy ADDVL_XXI $sp, 31
# CHECK-NEXT: $sp = frame-destroy ADDVL_XXI $sp, 31
# CHECK-NEXT: $sp = frame-destroy ADDVL_XXI $sp, 31
# CHECK-NEXT: $sp = frame-destroy ADDVL_XXI $sp, 31
# CHECK-NEXT: $sp = frame-destroy ADDVL_XXI $sp, 31
# CHECK-NEXT: $sp = frame-destroy ADDVL_XXI $sp, 31
# CHECK-NEXT: $sp = frame-destroy ADDVL_XXI $sp, 31
# CHECK-NEXT: $sp = frame-destroy ADDVL_XXI $sp, 31
# CHECK-NEXT: $sp = frame-destroy ADDVL_XXI $sp, 9
# CHECK-NEXT: $sp, $[[SCRATCH]] = frame-destroy LDRXpost $sp, 16
# CHECK-NEXT: RET_ReallyLR
name: test_address_sve_out_of_range
frameInfo:
maxAlignment: 16
fixedStack:
- { id: 0, stack-id: sve-vec, size: 16, alignment: 16, offset: -16 }
- { id: 1, stack-id: sve-vec, size: 3584, alignment: 16, offset: -3600 }
- { id: 2, stack-id: sve-vec, size: 512, alignment: 16, offset: -4112 }
body: |
bb.0.entry:
liveins: $z0, $p0
STR_ZXI $z0, %fixed-stack.0, 0
STR_PXI $p0, %fixed-stack.1, 0
RET_ReallyLR
---
|