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+ # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 5
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# Ensure that loads into FAKE_USEs are correctly removed by the
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# remove-loads-into-fake-uses pass.
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- # RUN: llc -run-pass remove-loads-into-fake-uses -mtriple=x86_64-unknown-linux -debug-only=remove-loads-into-fake-uses 2>&1 -o - %s | FileCheck %s --implicit-check-not=DELETING
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+ # RUN: llc -run-pass remove-loads-into-fake-uses -mtriple=x86_64-unknown-linux -debug-only=remove-loads-into-fake-uses 2>&1 -o - %s | FileCheck %s
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# REQUIRES: asserts
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#
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- # # We ensure that the load into the FAKE_USE is removed, along with the FAKE_USE
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- # # itself, even when the FAKE_USE is for a subregister of the move, and that we
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- # # correctly handle situations where FAKE_USE has additional `killed` operands
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- # # added by other passes.
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-
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- # CHECK: DELETING: renamable $rax = MOV64rm $rbp
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- # CHECK: DELETING: FAKE_USE renamable $eax
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-
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- # # Also verify that the store to the stack slot still exists.
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-
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- # CHECK-LABEL: bb.0:
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- # CHECK: MOV64mr $rbp, 1, $noreg, -48, $noreg, killed renamable $rax :: (store (s64) into %stack.0)
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-
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- # # Finally, verify that when the register has a use between the restore and the
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- # # FAKE_USE, we do not delete the load or fake use.
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-
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- # CHECK: renamable $r11 = MOV64rm $rbp, 1, $noreg, -40, $noreg :: (load (s64) from %stack.1)
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- # CHECK: renamable $r12d = XOR32rr $r12d, $r11d, implicit-def dead $eflags
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- # CHECK: FAKE_USE killed renamable $r11d
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+ # # We verify that:
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+ # # - The load into the FAKE_USE is removed, along with the FAKE_USE itself,
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+ # # even when the FAKE_USE is for a subregister of the move.
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+ # # - We correctly handle situations where FAKE_USE has additional `killed`
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+ # # operands added by other passes.
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+ # # - The store to the stack slot still exists.
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+ # # - When the register has a use between the restore and the FAKE_USE, we do
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+ # # not delete the load or fake use.
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---
@@ -39,16 +29,45 @@ liveins:
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frameInfo :
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isCalleeSavedInfoValid : true
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stack :
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- - { id: 0, name: '', type: spill-slot, offset: -8, size: 8, alignment: 8,
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- stack-id : default, callee-saved-register: '', callee-saved-restored: true,
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+ - { id: 0, name: '', type: spill-slot, offset: -8, size: 8, alignment: 8,
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+ stack-id : default, callee-saved-register: '', callee-saved-restored: true,
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debug-info-variable : ' ' , debug-info-expression: '', debug-info-location: '' }
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- - { id: 1, name: '', type: spill-slot, offset: -16, size: 8, alignment: 8,
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- stack-id : default, callee-saved-register: '', callee-saved-restored: true,
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+ - { id: 1, name: '', type: spill-slot, offset: -16, size: 8, alignment: 8,
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+ stack-id : default, callee-saved-register: '', callee-saved-restored: true,
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debug-info-variable : ' ' , debug-info-expression: '', debug-info-location: '' }
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body : |
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bb.0:
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liveins: $esi, $rdi, $rdx, $r15, $r14, $r13, $r12, $r11, $rbx
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+ ; CHECK-LABEL: name: _ZN1g1jEv
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+ ; CHECK: liveins: $esi, $rdi, $rdx, $r15, $r14, $r13, $r12, $r11, $rbx
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+ ; CHECK-NEXT: {{ $}}
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+ ; CHECK-NEXT: $rbx = MOV64rr $rdx
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+ ; CHECK-NEXT: $r14d = MOV32rr $esi
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+ ; CHECK-NEXT: $r15 = MOV64rr $rdi
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+ ; CHECK-NEXT: renamable $r12d = XOR32rr undef $r12d, undef $r12d, implicit-def dead $eflags, implicit-def $r12
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+ ; CHECK-NEXT: renamable $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $rax
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+
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+ ;; The store to the stack slot is still present.
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+ ; CHECK-NEXT: MOV64mr $rbp, 1, $noreg, -48, $noreg, killed renamable $rax :: (store (s64) into %stack.0)
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+
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+ ; CHECK-NEXT: MOV64mr $rbp, 1, $noreg, -40, $noreg, killed renamable $r11 :: (store (s64) into %stack.1)
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+ ; CHECK-NEXT: renamable $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags
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+ ; CHECK-NEXT: $r13d = MOV32rr killed $eax
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+ ; CHECK-NEXT: $rdi = MOV64rr $r15
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+ ; CHECK-NEXT: CALL64r renamable $r12, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp
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+ ; CHECK-NEXT: dead renamable $eax = MOV32rm renamable $rbx, 1, $noreg, 0, $noreg
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+ ; CHECK-NEXT: renamable $eax = MOV32ri 1
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+ ; CHECK-NEXT: TEST8ri renamable $r14b, 1, implicit-def $eflags
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+
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+ ;; First FAKE_USE and its corresponding load are removed; second FAKE_USE of
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+ ;; a restored value that is also used is preserved.
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+ ; CHECK-NEXT: renamable $r11 = MOV64rm $rbp, 1, $noreg, -40, $noreg :: (load (s64) from %stack.1)
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+ ; CHECK-NEXT: renamable $r12d = XOR32rr $r12d, $r11d, implicit-def dead $eflags
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+ ; CHECK-NEXT: FAKE_USE killed renamable $r11d
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+
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+ ; CHECK-NEXT: TEST32rr killed renamable $r13d, renamable $r13d, implicit-def $eflags
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+ ; CHECK-NEXT: RET64
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$rbx = MOV64rr $rdx
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$r14d = MOV32rr $esi
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$r15 = MOV64rr $rdi
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