1 # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 5
2 # Ensure that loads into FAKE_USEs are correctly removed by the
3 # remove-loads-into-fake-uses pass, and that if the function does not use
4 # instruction referencing then no changes are made.
5 # RUN: llc %s -run-pass remove-loads-into-fake-uses -mtriple=x86_64-unknown-linux -debug-only=remove-loads-into-fake-uses 2>&1 -o - | FileCheck %s
9 ## - The load into the FAKE_USE is removed, along with the FAKE_USE itself,
10 ## even when the FAKE_USE is for a subregister of the move.
11 ## - We correctly handle situations where FAKE_USE has additional `killed`
12 ## operands added by other passes.
13 ## - The store to the stack slot still exists.
14 ## - When the register has a use between the restore and the FAKE_USE, we do
15 ## not delete the load or fake use.
21 tracksRegLiveness: true
25 tracksDebugUserValues: true
28 - { reg: '$rdi', virtual-reg: '' }
29 - { reg: '$esi', virtual-reg: '' }
30 - { reg: '$rdx', virtual-reg: '' }
32 isCalleeSavedInfoValid: true
34 - { id: 0, name: '', type: spill-slot, offset: -8, size: 8, alignment: 8,
35 stack-id: default, callee-saved-register: '', callee-saved-restored: true,
36 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
37 - { id: 1, name: '', type: spill-slot, offset: -16, size: 8, alignment: 8,
38 stack-id: default, callee-saved-register: '', callee-saved-restored: true,
39 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
42 liveins: $esi, $rdi, $rdx, $r15, $r14, $r13, $r12, $r11, $rbx
44 ; CHECK-LABEL: name: enabled
45 ; CHECK: liveins: $esi, $rdi, $rdx, $r15, $r14, $r13, $r12, $r11, $rbx
47 ; CHECK-NEXT: $rbx = MOV64rr $rdx
48 ; CHECK-NEXT: $r14d = MOV32rr $esi
49 ; CHECK-NEXT: $r15 = MOV64rr $rdi
50 ; CHECK-NEXT: renamable $r12d = XOR32rr undef $r12d, undef $r12d, implicit-def dead $eflags, implicit-def $r12
51 ; CHECK-NEXT: renamable $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $rax
53 ;; The store to the stack slot is still present.
54 ; CHECK-NEXT: MOV64mr $rbp, 1, $noreg, -48, $noreg, killed renamable $rax :: (store (s64) into %stack.0)
56 ; CHECK-NEXT: MOV64mr $rbp, 1, $noreg, -40, $noreg, killed renamable $r11 :: (store (s64) into %stack.1)
57 ; CHECK-NEXT: renamable $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags
58 ; CHECK-NEXT: $r13d = MOV32rr killed $eax
59 ; CHECK-NEXT: $rdi = MOV64rr $r15
60 ; CHECK-NEXT: CALL64r renamable $r12, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp
61 ; CHECK-NEXT: dead renamable $eax = MOV32rm renamable $rbx, 1, $noreg, 0, $noreg
62 ; CHECK-NEXT: renamable $eax = MOV32ri 1
63 ; CHECK-NEXT: TEST8ri renamable $r14b, 1, implicit-def $eflags
65 ;; First FAKE_USE and its corresponding load are removed; second FAKE_USE of
66 ;; a restored value that is also used is preserved.
67 ; CHECK-NEXT: renamable $r11 = MOV64rm $rbp, 1, $noreg, -40, $noreg :: (load (s64) from %stack.1)
68 ; CHECK-NEXT: renamable $r12d = XOR32rr $r12d, $r11d, implicit-def dead $eflags
69 ; CHECK-NEXT: FAKE_USE killed renamable $r11d
71 ; CHECK-NEXT: TEST32rr killed renamable $r13d, renamable $r13d, implicit-def $eflags
77 renamable $r12d = XOR32rr undef $r12d, undef $r12d, implicit-def dead $eflags, implicit-def $r12
78 renamable $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $rax
79 MOV64mr $rbp, 1, $noreg, -48, $noreg, killed renamable $rax :: (store (s64) into %stack.0)
80 MOV64mr $rbp, 1, $noreg, -40, $noreg, killed renamable $r11 :: (store (s64) into %stack.1)
81 renamable $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags
82 $r13d = MOV32rr killed $eax
84 CALL64r renamable $r12, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp
85 dead renamable $eax = MOV32rm renamable $rbx, 1, $noreg, 0, $noreg
86 renamable $eax = MOV32ri 1
87 TEST8ri renamable $r14b, 1, implicit-def $eflags
88 renamable $rax = MOV64rm $rbp, 1, $noreg, -48, $noreg :: (load (s64) from %stack.0)
89 FAKE_USE renamable $eax, implicit killed $rax
90 renamable $r11 = MOV64rm $rbp, 1, $noreg, -40, $noreg :: (load (s64) from %stack.1)
91 renamable $r12d = XOR32rr $r12d, $r11d, implicit-def dead $eflags
92 FAKE_USE killed renamable $r11d
93 TEST32rr killed renamable $r13d, renamable $r13d, implicit-def $eflags
100 tracksRegLiveness: true
104 tracksDebugUserValues: true
107 - { reg: '$rdi', virtual-reg: '' }
108 - { reg: '$esi', virtual-reg: '' }
109 - { reg: '$rdx', virtual-reg: '' }
111 isCalleeSavedInfoValid: true
113 - { id: 0, name: '', type: spill-slot, offset: -8, size: 8, alignment: 8,
114 stack-id: default, callee-saved-register: '', callee-saved-restored: true,
115 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
116 - { id: 1, name: '', type: spill-slot, offset: -16, size: 8, alignment: 8,
117 stack-id: default, callee-saved-register: '', callee-saved-restored: true,
118 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
121 liveins: $esi, $rdi, $rdx, $r15, $r14, $r13, $r12, $r11, $rbx
123 ; CHECK-LABEL: name: disabled
124 ; CHECK: liveins: $esi, $rdi, $rdx, $r15, $r14, $r13, $r12, $r11, $rbx
126 ; CHECK-NEXT: $rbx = MOV64rr $rdx
127 ; CHECK-NEXT: $r14d = MOV32rr $esi
128 ; CHECK-NEXT: $r15 = MOV64rr $rdi
129 ; CHECK-NEXT: renamable $r12d = XOR32rr undef $r12d, undef $r12d, implicit-def dead $eflags, implicit-def $r12
130 ; CHECK-NEXT: renamable $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $rax
131 ; CHECK-NEXT: MOV64mr $rbp, 1, $noreg, -48, $noreg, killed renamable $rax :: (store (s64) into %stack.0)
132 ; CHECK-NEXT: MOV64mr $rbp, 1, $noreg, -40, $noreg, killed renamable $r11 :: (store (s64) into %stack.1)
133 ; CHECK-NEXT: renamable $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags
134 ; CHECK-NEXT: $r13d = MOV32rr killed $eax
135 ; CHECK-NEXT: $rdi = MOV64rr $r15
136 ; CHECK-NEXT: CALL64r renamable $r12, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp
137 ; CHECK-NEXT: dead renamable $eax = MOV32rm renamable $rbx, 1, $noreg, 0, $noreg
138 ; CHECK-NEXT: renamable $eax = MOV32ri 1
139 ; CHECK-NEXT: TEST8ri renamable $r14b, 1, implicit-def $eflags
141 ;; Verify that when instr-ref is disabled, we do not remove fake uses.
142 ; CHECK-NEXT: renamable $rax = MOV64rm $rbp, 1, $noreg, -48, $noreg :: (load (s64) from %stack.0)
143 ; CHECK-NEXT: FAKE_USE renamable $eax, implicit killed $rax
144 ; CHECK-NEXT: renamable $r11 = MOV64rm $rbp, 1, $noreg, -40, $noreg :: (load (s64) from %stack.1)
145 ; CHECK-NEXT: renamable $r12d = XOR32rr $r12d, $r11d, implicit-def dead $eflags
146 ; CHECK-NEXT: FAKE_USE killed renamable $r11d
147 ; CHECK-NEXT: TEST32rr killed renamable $r13d, renamable $r13d, implicit-def $eflags
152 renamable $r12d = XOR32rr undef $r12d, undef $r12d, implicit-def dead $eflags, implicit-def $r12
153 renamable $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags, implicit-def $rax
154 MOV64mr $rbp, 1, $noreg, -48, $noreg, killed renamable $rax :: (store (s64) into %stack.0)
155 MOV64mr $rbp, 1, $noreg, -40, $noreg, killed renamable $r11 :: (store (s64) into %stack.1)
156 renamable $eax = XOR32rr undef $eax, undef $eax, implicit-def dead $eflags
157 $r13d = MOV32rr killed $eax
159 CALL64r renamable $r12, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp
160 dead renamable $eax = MOV32rm renamable $rbx, 1, $noreg, 0, $noreg
161 renamable $eax = MOV32ri 1
162 TEST8ri renamable $r14b, 1, implicit-def $eflags
163 renamable $rax = MOV64rm $rbp, 1, $noreg, -48, $noreg :: (load (s64) from %stack.0)
164 FAKE_USE renamable $eax, implicit killed $rax
165 renamable $r11 = MOV64rm $rbp, 1, $noreg, -40, $noreg :: (load (s64) from %stack.1)
166 renamable $r12d = XOR32rr $r12d, $r11d, implicit-def dead $eflags
167 FAKE_USE killed renamable $r11d
168 TEST32rr killed renamable $r13d, renamable $r13d, implicit-def $eflags