49510c5020
All instructions that can raise fp exceptions also read FPCR, with the only other instructions that interact with it being the MSR/MRS to write/read FPCR. Introducing an FPCR register also requires adjusting invalidateWindowsRegisterPairing in AArch64FrameLowering.cpp to use the encoded value of registers instead of their enum value, as the enum value is based on the alphabetical order of register names and now FPCR is placed between FP and LR. This change unfortunately means a large number of mir tests need to be adjusted due to instructions now requiring an implicit fpcr operand to be present. Differential Revision: https://reviews.llvm.org/D121929
49 lines
1.3 KiB
YAML
49 lines
1.3 KiB
YAML
# RUN: llc -mtriple=aarch64-none-linux-gnu -mcpu=cortex-a57 -enable-unsafe-fp-math \
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# RUN: -run-pass machine-combiner -machine-combiner-inc-threshold=0 \
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# RUN: -machine-combiner-verify-pattern-order=true -verify-machineinstrs -o - %s | FileCheck %s
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---
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# Test incremental depth updates succeed when triggered after the removal of
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# the first instruction in a basic block.
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# CHECK-LABEL: name: inc_update_iterator_test
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name: inc_update_iterator_test
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registers:
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- { id: 0, class: fpr64 }
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- { id: 1, class: gpr32 }
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- { id: 2, class: gpr32 }
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- { id: 3, class: gpr32 }
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- { id: 4, class: gpr32 }
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- { id: 5, class: gpr32 }
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- { id: 6, class: gpr32 }
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- { id: 7, class: fpr64 }
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- { id: 8, class: fpr64 }
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- { id: 9, class: fpr64 }
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body: |
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bb.0:
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successors: %bb.1, %bb.2
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%3 = COPY $w2
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%2 = COPY $w1
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%1 = COPY $w0
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%0 = COPY $d0
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%4 = SUBSWrr %1, %2, implicit-def $nzcv
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Bcc 13, %bb.2, implicit $nzcv
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B %bb.1
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bb.1:
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; CHECK: MADDWrrr %1, %2, %3
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%5 = MADDWrrr %1, %2, $wzr
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%6 = ADDWrr %3, killed %5
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%7 = SCVTFUWDri killed %6, implicit $fpcr
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; CHECK: FMADDDrrr %7, %7, %0, implicit $fpcr
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%8 = FMULDrr %7, %7, implicit $fpcr
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%9 = FADDDrr %0, killed %8, implicit $fpcr
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$d0 = COPY %9
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RET_ReallyLR implicit $d0
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bb.2:
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$d0 = COPY %0
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RET_ReallyLR implicit $d0
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...
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