derek.holloway
7502bf64a4
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77 lines
2.6 KiB
YAML
77 lines
2.6 KiB
YAML
# RUN: llc -mtriple=aarch64 -simplify-mir -run-pass=shrink-wrap -o - %s | FileCheck %s
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--- |
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declare double @foo()
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define double @shrink_wrap_load_from_const_pool(double %q) {
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entry:
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%0 = fcmp oeq double %q, 3.125500e+02
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br i1 %0, label %common.ret, label %if.else
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common.ret: ; preds = %if.else, %entry, %exit1
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%common.ret.op = phi double [ %3, %exit1 ], [ 0.000000e+00, %entry ], [ 0.000000e+00, %if.else ]
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ret double %common.ret.op
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if.else: ; preds = %entry
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%1 = call double @foo()
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%2 = fcmp oeq double %1, 0.000000e+00
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br i1 %2, label %exit1, label %common.ret
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exit1: ; preds = %if.else
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%3 = call double @foo()
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br label %common.ret
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}
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...
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# Following code has a load from constant pool. Accessing constant pool
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# must not be considered as a stack access and hence, shrink wrapping must
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# happen.
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# CHECK-LABEL:name: shrink_wrap_load_from_const_pool
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# CHECK: savePoint:
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# CHECK: - point: '%bb.3'
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# CHECK: restorePoint:
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# CHECK: - point: '%bb.5'
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---
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name: shrink_wrap_load_from_const_pool
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tracksRegLiveness: true
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constants:
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- id: 0
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value: 'double 3.125500e+02'
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alignment: 8
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body: |
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bb.0.entry:
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successors: %bb.4(0x50000000), %bb.2(0x30000000)
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liveins: $d0
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renamable $d1 = COPY $d0
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renamable $x8 = ADRP target-flags(aarch64-page) %const.0
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renamable $d2 = LDRDui killed renamable $x8, target-flags(aarch64-pageoff, aarch64-nc) %const.0 :: (load (s64) from constant-pool)
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renamable $d0 = FMOVD0
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nofpexcept FCMPDrr killed renamable $d1, killed renamable $d2, implicit-def $nzcv, implicit $fpcr
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Bcc 1, %bb.2, implicit killed $nzcv
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bb.4:
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liveins: $d0
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bb.1.common.ret:
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liveins: $d0
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RET_ReallyLR implicit $d0
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bb.2.if.else:
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successors: %bb.3(0x50000000), %bb.1(0x30000000)
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ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
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BL @foo, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp, implicit-def $d0
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ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
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renamable $d1 = COPY $d0
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renamable $d0 = FMOVD0
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nofpexcept FCMPDri killed renamable $d1, implicit-def $nzcv, implicit $fpcr
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Bcc 1, %bb.1, implicit killed $nzcv
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B %bb.3
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bb.3.exit1:
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ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
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BL @foo, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp, implicit-def $d0
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ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
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B %bb.1
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...
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