90 lines
2.7 KiB
YAML
90 lines
2.7 KiB
YAML
# RUN: llc -mtriple=aarch64--linux-gnu -mattr=+sve -run-pass=peephole-opt -verify-machineinstrs %s -o - | FileCheck %s
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# Test that RDFFR followed by PTEST is replaced with RDFFRS.
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---
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# CHECK-LABEL: name:{{\s*}} substitute_rdffr_pp_with_rdffrs_pp
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name: substitute_rdffr_pp_with_rdffrs_pp
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $ffr, $p0
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%0:ppr_3b = COPY $p0
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; CHECK: RDFFRS_PPz
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; CHECK-NOT: PTEST
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%1:ppr_3b = RDFFR_PPz %0:ppr_3b
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PTEST_PP killed %0:ppr_3b, killed %1:ppr_3b, implicit-def $nzcv
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; Consume nzcv
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%2:gpr32 = COPY $wzr
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%3:gpr32 = CSINCWr killed %2, $wzr, 0, implicit $nzcv
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$w0 = COPY %3
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RET_ReallyLR implicit $w0
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...
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---
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# CHECK-LABEL: name:{{\s*}} fail_to_substitute_rdffr_pp_with_rdffrs_pp_differing_mask
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name: fail_to_substitute_rdffr_pp_with_rdffrs_pp_differing_mask
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $ffr, $p0, $p1
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%0:ppr_3b = COPY $p0
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%1:ppr_3b = COPY $p1
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; CHECK: RDFFR_PPz
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; CHECK: PTEST
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%2:ppr_3b = RDFFR_PPz %0:ppr_3b
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PTEST_PP killed %1:ppr_3b, killed %2:ppr_3b, implicit-def $nzcv
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; Consume nzcv
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%3:gpr32 = COPY $wzr
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%4:gpr32 = CSINCWr killed %3, $wzr, 0, implicit $nzcv
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$w0 = COPY %4
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RET_ReallyLR implicit $w0
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...
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---
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# CHECK-LABEL: name:{{\s*}} fail_to_substitute_rdffr_pp_with_rdffrs_pp_nzcv_clobbered
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name: fail_to_substitute_rdffr_pp_with_rdffrs_pp_nzcv_clobbered
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $ffr, $p0, $x0
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%0:ppr_3b = COPY $p0
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; CHECK: RDFFR_PPz
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; CHECK-NEXT: ADDSXrr
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; CHECK-NEXT: PTEST_PP
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%1:ppr_3b = RDFFR_PPz %0:ppr_3b
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; Clobber nzcv
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$x0 = ADDSXrr $x0, $x0, implicit-def $nzcv
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PTEST_PP killed %0:ppr_3b, killed %1:ppr_3b, implicit-def $nzcv
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; Consume nzcv
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%2:gpr32 = COPY $wzr
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%3:gpr32 = CSINCWr killed %2, $wzr, 0, implicit $nzcv
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$w0 = COPY %3
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RET_ReallyLR implicit $w0
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...
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---
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# CHECK-LABEL: name:{{\s*}} fail_to_substitute_rdffr_pp_with_rdffrs_pp_nzcv_flags_used_between
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name: fail_to_substitute_rdffr_pp_with_rdffrs_pp_nzcv_flags_used_between
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $ffr, $p0, $x0
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%0:ppr_3b = COPY $p0
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$wzr = SUBSWri $w0, 0, 0, implicit-def $nzcv
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; CHECK: RDFFR_PPz
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; CHECK-NEXT: CSINCWr
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; CHECK-NEXT: PTEST_PP
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%1:ppr_3b = RDFFR_PPz %0:ppr_3b
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; Consume nzcv
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%2:gpr32 = CSINCWr $wzr, $wzr, 0, implicit $nzcv
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PTEST_PP killed %0:ppr_3b, killed %1:ppr_3b, implicit-def $nzcv
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; Consume nzcv
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%3:gpr32 = COPY $wzr
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%4:gpr32 = CSINCWr killed %3, $wzr, 0, implicit $nzcv
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$w0 = ORRWrs %4, %2, 1
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RET_ReallyLR implicit $w0
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