1 # RUN: llc -mtriple=aarch64 -run-pass=machine-outliner -machine-outliner-reruns=1 -verify-machineinstrs %s -o - | FileCheck %s --check-prefix TWO-RUNS
2 # RUN: llc -mtriple=aarch64 -run-pass=machine-outliner -machine-outliner-reruns=0 -verify-machineinstrs %s -o - | FileCheck %s --check-prefix ONE-RUN
3 # RUN: llc -mtriple=aarch64 -run-pass=machine-outliner -machine-outliner-reruns=3 -verify-machineinstrs %s -o - | FileCheck %s --check-prefix FOUR-RUNS
5 # Example of Repeated Instruction Sequence - Iterative Machine Outlining
7 #; define void @"$s12"(...) { define i64 @"$s5” (...) { define void @"$s13"(...) {
9 # %8 = load i1, i1* %7 %8 = load i1, i1* %7
10 # %9 = load i4, i4*, %6 %9 = load i4, i4*, %6 %9 = load i4, i4*, %6
11 # store i4 %9, i4* %5 store i4 %9, i4* %5 store i4 %9, i4* %5
15 # After machine outliner (1st time)
17 # define void @"$s12"(...) { define i64 @"$s5” (...) { define void @"$s13"(...) {
19 # %8 = load i1, i1* %7 %8 = load i1, i1* %7
20 # call void @outlined_function_1_1 call void @outlined_function_1_1 call void @outlined_function_1_1
24 # After machine outliner (2nd time)
26 # define void @"$s12"(...) { define i64 @"$s5” (...) { define void @"$s13"(...) {
28 # call void @outlined_function_2_1 call void @outlined_function_1_1 call void @outlined_function_2_1
32 # Check whether machine outliner can further find the outlining opportunity after machine
33 # outlining has performed.
36 declare void @foo() local_unnamed_addr
38 declare void @widget() local_unnamed_addr
40 ; Function Attrs: minsize noredzone optsize
41 define void @baz.14() #0 {
45 ; Function Attrs: minsize noredzone optsize
46 define void @baz.15() #0 {
50 ; Function Attrs: minsize noredzone optsize
51 define void @baz.16() #0 {
55 attributes #0 = { minsize noredzone optsize }
59 tracksRegLiveness: true
61 - { id: 0, offset: -8, size: 8 }
62 - { id: 1, offset: -16, size: 8 }
65 liveins: $x0, $x19, $lr
67 early-clobber $sp = frame-setup STPXpre killed $lr, killed $x19, $sp, -2 :: (store (s64) into %stack.1), (store (s64) into %stack.0)
68 frame-setup CFI_INSTRUCTION def_cfa_offset 16
69 frame-setup CFI_INSTRUCTION offset $w19, -8
70 frame-setup CFI_INSTRUCTION offset $w30, -16
71 renamable $x19 = COPY $x0
72 renamable $x0 = nuw ADDXri $x0, 48, 0
73 $x1 = ADDXri $sp, 0, 0
74 dead $w2 = MOVi32imm 33, implicit-def $x2
76 BL @foo, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit killed $x1, implicit killed $x2, implicit killed $x3, implicit-def $sp
77 $x0 = COPY killed renamable $x19
78 BL @widget, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit-def $sp
79 early-clobber $sp, $lr, $x19 = frame-destroy LDPXpost $sp, 2 :: (load (s64) from %stack.1), (load (s64) from %stack.0)
85 tracksRegLiveness: true
87 - { id: 0, offset: -8, size: 8 }
88 - { id: 1, offset: -16, size: 8 }
91 liveins: $x0, $x19, $lr
93 early-clobber $sp = frame-setup STPXpre killed $lr, killed $x19, $sp, -2 :: (store (s64) into %stack.1), (store (s64) into %stack.0)
94 frame-setup CFI_INSTRUCTION def_cfa_offset 16
95 frame-setup CFI_INSTRUCTION offset $w19, -8
96 frame-setup CFI_INSTRUCTION offset $w30, -16
97 renamable $x19 = COPY $x0
98 renamable $x0 = nuw ADDXri killed renamable $x0, 16, 0
99 $x1 = ADDXri $sp, 0, 0
100 dead $w2 = MOVi32imm 33, implicit-def $x2
102 BL @foo, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit $x1, implicit killed $x2, implicit killed $x3, implicit-def $sp
103 $x0 = COPY killed renamable $x19
104 BL @widget, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit-def $sp
105 early-clobber $sp, $lr, $x19 = frame-destroy LDPXpost $sp, 2 :: (load (s64) from %stack.1), (load (s64) from %stack.0)
111 tracksRegLiveness: true
113 - { id: 0, offset: -8, size: 8 }
114 - { id: 1, offset: -16, size: 8 }
117 liveins: $x0, $x19, $lr
119 early-clobber $sp = frame-setup STPXpre killed $lr, killed $x19, $sp, -2 :: (store (s64) into %stack.1), (store (s64) into %stack.0)
120 frame-setup CFI_INSTRUCTION def_cfa_offset 16
121 frame-setup CFI_INSTRUCTION offset $w19, -8
122 frame-setup CFI_INSTRUCTION offset $w30, -16
123 renamable $x19 = COPY $x0
124 renamable $x0 = nuw ADDXri $x0, 48, 0
125 $x1 = ADDXri $sp, 0, 0
126 dead $w2 = MOVi32imm 33, implicit-def $x2
128 BL @foo, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit killed $x1, implicit killed $x2, implicit killed $x3, implicit-def $sp
129 $x0 = COPY killed renamable $x19
130 BL @widget, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit-def $sp
131 early-clobber $sp, $lr, $x19 = frame-destroy LDPXpost $sp, 2 :: (load (s64) from %stack.1), (load (s64) from %stack.0)
136 # TWO-RUNS: name: OUTLINED_FUNCTION_2_0
137 # TWO-RUNS-DAG: bb.0:
138 # TWO-RUNS-DAG: renamable $x19 = COPY $x0
139 # TWO-RUNS-NEXT: renamable $x0 = nuw ADDXri $x0, 48, 0
140 # TWO-RUNS-NEXT: TCRETURNdi @OUTLINED_FUNCTION_0, 0, implicit $sp
142 # The machine outliner is expected to stop at the 1st iteration for case ONE-RUN
143 # since machine-outline-runs is specified as 1.
144 # ONE-RUN-NOT: [[OUTLINED:OUTLINED_FUNCTION_2_[0-9]+]]
146 # The machine outliner is expected to stop at the 3rd iteration for case FOUR-RUNS
147 # since the MIR has no change at the 3rd iteration.
148 # FOUR-RUNS-NOT: [[OUTLINED:OUTLINED_FUNCTION_3_[0-9]+]]
149 # FOUR-RUNS-NOT: [[OUTLINED:OUTLINED_FUNCTION_4_[0-9]+]]