150 lines
6.5 KiB
YAML
150 lines
6.5 KiB
YAML
# RUN: llc -mtriple=aarch64 -run-pass=machine-outliner -machine-outline-runs=2 -verify-machineinstrs %s -o - | FileCheck %s --check-prefix TWO-RUNS
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# RUN: llc -mtriple=aarch64 -run-pass=machine-outliner -machine-outline-runs=1 -verify-machineinstrs %s -o - | FileCheck %s --check-prefix ONE-RUN
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# RUN: llc -mtriple=aarch64 -run-pass=machine-outliner -machine-outline-runs=4 -verify-machineinstrs %s -o - | FileCheck %s --check-prefix FOUR-RUNS
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# Example of Repeated Instruction Sequence - Iterative Machine Outlining
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#
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#; define void @"$s12"(...) { define i64 @"$s5” (...) { define void @"$s13"(...) {
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# ... ... ...
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# %8 = load i1, i1* %7 %8 = load i1, i1* %7
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# %9 = load i4, i4*, %6 %9 = load i4, i4*, %6 %9 = load i4, i4*, %6
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# store i4 %9, i4* %5 store i4 %9, i4* %5 store i4 %9, i4* %5
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# ... ... ...
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# } } }
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#
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# After machine outliner (1st time)
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#
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# define void @"$s12"(...) { define i64 @"$s5” (...) { define void @"$s13"(...) {
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# ... ... ...
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# %8 = load i1, i1* %7 %8 = load i1, i1* %7
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# call void @outlined_function_1_1 call void @outlined_function_1_1 call void @outlined_function_1_1
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# ... ... ...
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# } } }
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#
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# After machine outliner (2nd time)
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#
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# define void @"$s12"(...) { define i64 @"$s5” (...) { define void @"$s13"(...) {
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# ... ... ...
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# call void @outlined_function_2_1 call void @outlined_function_1_1 call void @outlined_function_2_1
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# ... ... ...
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# } } }
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#
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# Check whether machine outliner can further find the outlining opportunity after machine
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# outlining has performed.
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#
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--- |
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declare void @foo() local_unnamed_addr
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declare void @widget() local_unnamed_addr
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; Function Attrs: minsize noredzone optsize
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define void @baz.14() #0 {
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ret void
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}
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; Function Attrs: minsize noredzone optsize
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define void @baz.15() #0 {
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ret void
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}
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; Function Attrs: minsize noredzone optsize
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define void @baz.16() #0 {
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ret void
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}
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attributes #0 = { minsize noredzone optsize }
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...
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---
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name: baz.14
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tracksRegLiveness: true
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stack:
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- { id: 0, offset: -8, size: 8 }
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- { id: 1, offset: -16, size: 8 }
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body: |
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bb.0:
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liveins: $x0, $x19, $lr
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early-clobber $sp = frame-setup STPXpre killed $lr, killed $x19, $sp, -2 :: (store 8 into %stack.1), (store 8 into %stack.0)
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frame-setup CFI_INSTRUCTION def_cfa_offset 16
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frame-setup CFI_INSTRUCTION offset $w19, -8
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frame-setup CFI_INSTRUCTION offset $w30, -16
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renamable $x19 = COPY $x0
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renamable $x0 = nuw ADDXri $x0, 48, 0
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$x1 = ADDXri $sp, 0, 0
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dead $w2 = MOVi32imm 33, implicit-def $x2
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$x3 = COPY $xzr
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BL @foo, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit killed $x1, implicit killed $x2, implicit killed $x3, implicit-def $sp
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$x0 = COPY killed renamable $x19
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BL @widget, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit-def $sp
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early-clobber $sp, $lr, $x19 = frame-destroy LDPXpost $sp, 2 :: (load 8 from %stack.1), (load 8 from %stack.0)
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RET_ReallyLR
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...
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---
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name: baz.15
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tracksRegLiveness: true
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stack:
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- { id: 0, offset: -8, size: 8 }
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- { id: 1, offset: -16, size: 8 }
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body: |
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bb.0:
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liveins: $x0, $x19, $lr
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early-clobber $sp = frame-setup STPXpre killed $lr, killed $x19, $sp, -2 :: (store 8 into %stack.1), (store 8 into %stack.0)
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frame-setup CFI_INSTRUCTION def_cfa_offset 16
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frame-setup CFI_INSTRUCTION offset $w19, -8
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frame-setup CFI_INSTRUCTION offset $w30, -16
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renamable $x19 = COPY $x0
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renamable $x0 = nuw ADDXri killed renamable $x0, 16, 0
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$x1 = ADDXri $sp, 0, 0
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dead $w2 = MOVi32imm 33, implicit-def $x2
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$x3 = COPY $xzr
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BL @foo, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit $x1, implicit killed $x2, implicit killed $x3, implicit-def $sp
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$x0 = COPY killed renamable $x19
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BL @widget, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit-def $sp
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early-clobber $sp, $lr, $x19 = frame-destroy LDPXpost $sp, 2 :: (load 8 from %stack.1), (load 8 from %stack.0)
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RET_ReallyLR
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...
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---
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name: baz.16
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tracksRegLiveness: true
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stack:
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- { id: 0, offset: -8, size: 8 }
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- { id: 1, offset: -16, size: 8 }
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body: |
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bb.0:
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liveins: $x0, $x19, $lr
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early-clobber $sp = frame-setup STPXpre killed $lr, killed $x19, $sp, -2 :: (store 8 into %stack.1), (store 8 into %stack.0)
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frame-setup CFI_INSTRUCTION def_cfa_offset 16
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frame-setup CFI_INSTRUCTION offset $w19, -8
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frame-setup CFI_INSTRUCTION offset $w30, -16
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renamable $x19 = COPY $x0
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renamable $x0 = nuw ADDXri $x0, 48, 0
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$x1 = ADDXri $sp, 0, 0
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dead $w2 = MOVi32imm 33, implicit-def $x2
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$x3 = COPY $xzr
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BL @foo, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit killed $x1, implicit killed $x2, implicit killed $x3, implicit-def $sp
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$x0 = COPY killed renamable $x19
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BL @widget, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit-def $sp
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early-clobber $sp, $lr, $x19 = frame-destroy LDPXpost $sp, 2 :: (load 8 from %stack.1), (load 8 from %stack.0)
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RET_ReallyLR
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...
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# TWO-RUNS: name: OUTLINED_FUNCTION_2_0
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# TWO-RUNS-DAG: bb.0:
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# TWO-RUNS-DAG: renamable $x19 = COPY $x0
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# TWO-RUNS-NEXT: renamable $x0 = nuw ADDXri $x0, 48, 0
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# TWO-RUNS-NEXT: TCRETURNdi @OUTLINED_FUNCTION_0, 0, implicit $sp
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#
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# The machine outliner is expected to stop at the 1st iteration for case ONE-RUN
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# since machine-outline-runs is specified as 1.
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# ONE-RUN-NOT: [[OUTLINED:OUTLINED_FUNCTION_2_[0-9]+]]
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#
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# The machine outliner is expected to stop at the 3rd iteration for case FOUR-RUNS
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# since the MIR has no change at the 3rd iteration.
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# FOUR-RUNS-NOT: [[OUTLINED:OUTLINED_FUNCTION_3_[0-9]+]]
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# FOUR-RUNS-NOT: [[OUTLINED:OUTLINED_FUNCTION_4_[0-9]+]]
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