3780a4e568
On windows, the callee saved registers in a canonical prologue are ordered starting from a lower register number at a lower stack address (with the possible gap for aligning the stack at the top); this is the opposite order that llvm normally produces. To achieve this, reverse the order of the registers in the assignCalleeSavedSpillSlots callback, to get the stack objects laid out by PrologEpilogInserter in the right order, and adjust computeCalleeSaveRegisterPairs to lay them out from the bottom up. This allows generated prologs more often to match the format that allows the unwind info to be written as packed info. Differential Revision: https://reviews.llvm.org/D88677
61 lines
2.2 KiB
YAML
61 lines
2.2 KiB
YAML
# RUN: llc -o - %s -mtriple=aarch64-windows -start-before=prologepilog \
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# RUN: -stop-after=prologepilog | FileCheck %s
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# Check save_regp_x, save_regp
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# CHECK: early-clobber $sp = frame-setup STPXpre killed $x19, killed $x20, $sp, -10
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# CHECK-NEXT: frame-setup SEH_SaveRegP_X 19, 20, -80
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# CHECK-NEXT: frame-setup STPXi killed $x21, killed $x22, $sp, 2
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# CHECK-NEXT: frame-setup SEH_SaveRegP 21, 22, 16
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# CHECK-NEXT: frame-setup STPXi killed $x23, killed $x24, $sp, 4
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# CHECK-NEXT: frame-setup SEH_SaveRegP 23, 24, 32
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# CHECK-NEXT: frame-setup STPXi killed $x25, killed $x26, $sp, 6
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# CHECK-NEXT: frame-setup SEH_SaveRegP 25, 26, 48
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# CHECK-NEXT: frame-setup STPXi killed $x27, killed $x28, $sp, 8
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# CHECK-NEXT: frame-setup SEH_SaveRegP 27, 28, 64
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# CHECK-NEXT: frame-setup SEH_PrologEnd
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# CHECK: frame-destroy SEH_EpilogStart
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# CHECK-NEXT: $x27, $x28 = frame-destroy LDPXi $sp, 8
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# CHECK-NEXT: frame-destroy SEH_SaveRegP 27, 28, 64
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# CHECK-NEXT: $x25, $x26 = frame-destroy LDPXi $sp, 6
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# CHECK-NEXT: frame-destroy SEH_SaveRegP 25, 26, 48
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# CHECK-NEXT: $x23, $x24 = frame-destroy LDPXi $sp, 4
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# CHECK-NEXT: frame-destroy SEH_SaveRegP 23, 24, 32
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# CHECK-NEXT: $x21, $x22 = frame-destroy LDPXi $sp, 2
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# CHECK-NEXT: frame-destroy SEH_SaveRegP 21, 22, 16
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# CHECK-NEXT: early-clobber $sp, $x19, $x20 = frame-destroy LDPXpost $sp, 10
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# CHECK-NEXT: frame-destroy SEH_SaveRegP_X 19, 20, -80
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# CHECK-NEXT: frame-destroy SEH_EpilogEnd
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# CHECK-NEXT: RET_ReallyLR implicit $x0
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...
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---
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name: test
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alignment: 4
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tracksRegLiveness: true
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hasWinCFI: true
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liveins:
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- { reg: '$w0' }
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frameInfo:
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stackSize: 80
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maxAlignment: 8
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maxCallFrameSize: 0
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hasOpaqueSPAdjustment: true
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stack:
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body: |
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bb.0.entry:
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liveins: $x0, $x1, $x27, $x28, $x25, $x26, $x23, $x24, $x21, $x22, $x19, $x20
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$x19 = ADDXrr $x0, killed $x1
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$x20 = ADDXrr $x19, killed $x0
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$x21 = ADDXrr $x20, killed $x19
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$x22 = ADDXrr $x21, killed $x20
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$x23 = ADDXrr $x22, killed $x21
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$x24 = ADDXrr $x23, killed $x22
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$x25 = ADDXrr $x24, killed $x23
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$x26 = ADDXrr $x25, killed $x24
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$x27 = ADDXrr $x26, killed $x25
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$x28 = ADDXrr $x27, killed $x26
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$x0 = COPY $x28
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RET_ReallyLR implicit $x0
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...
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