derek.holloway
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100 lines
3.6 KiB
YAML
100 lines
3.6 KiB
YAML
# RUN: llc -mtriple=aarch64-none-linux-gnu -aarch64-stack-hazard-size=1024 -run-pass=prologepilog %s -o - | FileCheck %s
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--- |
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define void @stack_hazard_streaming_compat() "aarch64_pstate_sm_compatible" { entry: unreachable }
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define void @stack_hazard_streaming_compat_emergency_spill_slot() "aarch64_pstate_sm_compatible" { entry: unreachable }
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...
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# +------------------+
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# | GPR callee-saves |
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# +------------------+ <- FP
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# | <hazard padding> |
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# +------------------+
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# | FPR locals |
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# | %stack.1 |
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# +------------------+
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# | <hazard padding> |
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# +------------------+
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# | GPR locals |
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# | %stack.2 |
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# | <emergency spill>|
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# +------------------+ <- BP
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# | <VLA> |
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# +------------------+ <- SP (can't be used due to VLA)
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# In this case without the base pointer we'd need the emergency spill slot to
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# access both %stack.1 and %stack.2. With the base pointer we can reach both
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# without spilling.
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name: stack_hazard_streaming_compat
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# CHECK-LABEL: name: stack_hazard_streaming_compat
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# CHECK: bb.0:
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# CHECK: STRDui $d0, $x19, 131
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# CHECK-NEXT: STRXui $x0, $x19, 1
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# CHECK: bb.1:
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tracksRegLiveness: true
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frameInfo:
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isFrameAddressTaken: true
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stack:
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- { id: 0, type: variable-sized, alignment: 1 }
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- { id: 1, size: 8, alignment: 8 }
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- { id: 2, size: 8, alignment: 8 }
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body: |
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bb.0:
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liveins: $x0, $x8, $d0
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$x9 = LDRXui $x0, 0 :: (load (s64))
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STRDui $d0, %stack.1, 0 :: (store (s64) into %stack.1)
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STRXui $x0, %stack.2, 0 :: (store (s64) into %stack.2)
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B %bb.1
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bb.1:
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liveins: $x1, $x2, $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10, $x11, $x12, $x13, $x14, $x15, $x16, $x17, $x18, $x19, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28, $lr
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RET_ReallyLR implicit $x19, implicit $x20, implicit $x21, implicit $x22, implicit $x23, implicit $x24, implicit $x25, implicit $x26, implicit $x27, implicit $x28, implicit $lr
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...
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---
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# +------------------+
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# | GPR callee-saves |
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# +------------------+ <- FP
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# | <hazard padding> |
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# +------------------+
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# | FPR locals |
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# | %stack.1 |
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# +------------------+
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# | <hazard padding> |
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# +------------------+
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# | GPR locals |
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# | %stack.2 | (very large)
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# | <emergency spill>|
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# +------------------+ <- BP
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# | <VLA> |
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# +------------------+ <- SP (can't be used due to VLA)
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# In this case we need to use the emergency spill slot to access %stack.1 as it
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# is too far from the frame pointer and the base pointer to directly address.
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# Note: This also tests that the <emergency spill> located near the SP/BP.
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name: stack_hazard_streaming_compat_emergency_spill_slot
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# CHECK-LABEL: name: stack_hazard_streaming_compat_emergency_spill_slot
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# CHECK: bb.0:
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# CHECK: STRXui killed $[[SCRATCH:x[0-9]+]], $x19, 0
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# CHECK-NEXT: $[[SCRATCH]] = ADDXri $x19, 1056, 0
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# CHECK-NEXT: STRDui $d0, killed $[[SCRATCH]], 4095
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# CHECK-NEXT: $[[SCRATCH]] = LDRXui $x19, 0
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# CHECK: bb.1:
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tracksRegLiveness: true
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frameInfo:
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isFrameAddressTaken: true
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stack:
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- { id: 0, type: variable-sized, alignment: 1 }
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- { id: 1, size: 8, alignment: 8 }
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- { id: 2, size: 32761, alignment: 8 }
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body: |
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bb.0:
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liveins: $x0, $x8, $d0
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$x9 = LDRXui $x0, 0 :: (load (s64))
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STRDui $d0, %stack.1, 0 :: (store (s64) into %stack.1)
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B %bb.1
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bb.1:
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liveins: $x0, $x1, $x2, $x3, $x4, $x5, $x6, $x7, $x8, $x9, $x10, $x11, $x12, $x13, $x14, $x15, $x16, $x17, $x18, $x19, $x20, $x21, $x22, $x23, $x24, $x25, $x26, $x27, $x28, $lr
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RET_ReallyLR implicit $x19, implicit $x20, implicit $x21, implicit $x22, implicit $x23, implicit $x24, implicit $x25, implicit $x26, implicit $x27, implicit $x28, implicit $lr
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