derek.holloway
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131 lines
5.1 KiB
LLVM
131 lines
5.1 KiB
LLVM
; This test is mainly for the -outliner-leaf-descendants flag for MachineOutliner.
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;
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; ===================== -outliner-leaf-descendants=false =====================
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; MachineOutliner finds THREE key `OutlinedFunction` and outlines them. They are:
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; ```
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; mov w0, #1
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; mov w1, #2
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; mov w2, #3
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; mov w3, #4
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; mov w4, #5
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; mov w5, #6 or #7 or #8
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; b
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; ```
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; Each has:
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; - `SequenceSize=28` and `OccurrenceCount=2`
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; - each Candidate has `CallOverhead=4` and `FrameOverhead=0`
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; - `NotOutlinedCost=28*2=56` and `OutliningCost=4*2+28+0=36`
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; - `Benefit=56-36=20` and `Priority=56/36=1.56`
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;
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; ===================== -outliner-leaf-descendants=true =====================
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; MachineOutliner finds a FOURTH key `OutlinedFunction`, which is:
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; ```
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; mov w0, #1
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; mov w1, #2
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; mov w2, #3
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; mov w3, #4
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; mov w4, #5
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; ```
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; This corresponds to an internal node that has ZERO leaf children, but SIX leaf descendants.
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; It has:
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; - `SequenceSize=20` and `OccurrenceCount=6`
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; - each Candidate has `CallOverhead=12` and `FrameOverhead=4`
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; - `NotOutlinedCost=20*6=120` and `OutliningCost=12*6+20+4=96`
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; - `Benefit=120-96=24` and `Priority=120/96=1.25`
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;
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; The FOURTH `OutlinedFunction` has lower _priority_ compared to the first THREE `OutlinedFunction`.
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; Hence, we use `-outliner-benefit-threshold=22` to check if the FOURTH `OutlinedFunction` is identified.
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; RUN: llc %s -enable-machine-outliner=always -outliner-leaf-descendants=false -mattr=+m -mtriple=riscv64 -filetype=obj -o %t
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; RUN: llvm-objdump -d %t | FileCheck %s --check-prefix=CHECK-BASELINE
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; RUN: llc %s -enable-machine-outliner=always -outliner-leaf-descendants=false -mattr=+m -mtriple=riscv64 -outliner-benefit-threshold=22 -filetype=obj -o %t
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; RUN: llvm-objdump -d %t | FileCheck %s --check-prefix=CHECK-NO-CANDIDATE
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; RUN: llc %s -enable-machine-outliner=always -outliner-leaf-descendants=false -mattr=+m -mtriple=riscv32 -filetype=obj -o %t
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; RUN: llvm-objdump -d %t | FileCheck %s --check-prefix=CHECK-BASELINE
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; RUN: llc %s -enable-machine-outliner=always -outliner-leaf-descendants=false -mattr=+m -mtriple=riscv32 -outliner-benefit-threshold=22 -filetype=obj -o %t
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; RUN: llvm-objdump -d %t | FileCheck %s --check-prefix=CHECK-NO-CANDIDATE
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; RUN: llc %s -enable-machine-outliner=always -outliner-leaf-descendants=true -mattr=+m -mtriple=riscv64 -filetype=obj -o %t
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; RUN: llvm-objdump -d %t | FileCheck %s --check-prefix=CHECK-LEAF-DESCENDANTS
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; RUN: llc %s -enable-machine-outliner=always -outliner-leaf-descendants=true -mattr=+m -mtriple=riscv64 -outliner-benefit-threshold=22 -filetype=obj -o %t
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; RUN: llvm-objdump -d %t | FileCheck %s --check-prefix=CHECK-LEAF-DESCENDANTS
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declare i32 @_Z3fooiiii(i32 noundef, i32 noundef, i32 noundef, i32 noundef, i32 noundef, i32 noundef)
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define i32 @_Z2f1v() minsize {
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%1 = tail call i32 @_Z3fooiiii(i32 noundef 1, i32 noundef 2, i32 noundef 3, i32 noundef 4, i32 noundef 5, i32 noundef 6)
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ret i32 %1
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}
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define i32 @_Z2f2v() minsize {
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%1 = tail call i32 @_Z3fooiiii(i32 noundef 1, i32 noundef 2, i32 noundef 3, i32 noundef 4, i32 noundef 5, i32 noundef 6)
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ret i32 %1
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}
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define i32 @_Z2f3v() minsize {
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%1 = tail call i32 @_Z3fooiiii(i32 noundef 1, i32 noundef 2, i32 noundef 3, i32 noundef 4, i32 noundef 5, i32 noundef 7)
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ret i32 %1
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}
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define i32 @_Z2f4v() minsize {
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%1 = tail call i32 @_Z3fooiiii(i32 noundef 1, i32 noundef 2, i32 noundef 3, i32 noundef 4, i32 noundef 5, i32 noundef 7)
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ret i32 %1
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}
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define i32 @_Z2f5v() minsize {
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%1 = tail call i32 @_Z3fooiiii(i32 noundef 1, i32 noundef 2, i32 noundef 3, i32 noundef 4, i32 noundef 5, i32 noundef 8)
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ret i32 %1
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}
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define i32 @_Z2f6v() minsize {
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%1 = tail call i32 @_Z3fooiiii(i32 noundef 1, i32 noundef 2, i32 noundef 3, i32 noundef 4, i32 noundef 5, i32 noundef 8)
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ret i32 %1
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}
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; CHECK-BASELINE: <OUTLINED_FUNCTION_0>:
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; CHECK-BASELINE-NEXT: li a0, 0x1
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; CHECK-BASELINE-NEXT: li a1, 0x2
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; CHECK-BASELINE-NEXT: li a2, 0x3
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; CHECK-BASELINE-NEXT: li a3, 0x4
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; CHECK-BASELINE-NEXT: li a4, 0x5
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; CHECK-BASELINE-NEXT: li a5, 0x6
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; CHECK-BASELINE-NEXT: auipc t1, 0x0
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; CHECK-BASELINE-NEXT: jr t1
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; CHECK-BASELINE: <OUTLINED_FUNCTION_1>:
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; CHECK-BASELINE-NEXT: li a0, 0x1
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; CHECK-BASELINE-NEXT: li a1, 0x2
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; CHECK-BASELINE-NEXT: li a2, 0x3
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; CHECK-BASELINE-NEXT: li a3, 0x4
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; CHECK-BASELINE-NEXT: li a4, 0x5
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; CHECK-BASELINE-NEXT: li a5, 0x8
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; CHECK-BASELINE-NEXT: auipc t1, 0x0
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; CHECK-BASELINE-NEXT: jr t1
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; CHECK-BASELINE: <OUTLINED_FUNCTION_2>:
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; CHECK-BASELINE-NEXT: li a0, 0x1
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; CHECK-BASELINE-NEXT: li a1, 0x2
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; CHECK-BASELINE-NEXT: li a2, 0x3
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; CHECK-BASELINE-NEXT: li a3, 0x4
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; CHECK-BASELINE-NEXT: li a4, 0x5
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; CHECK-BASELINE-NEXT: li a5, 0x7
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; CHECK-BASELINE-NEXT: auipc t1, 0x0
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; CHECK-BASELINE-NEXT: jr t1
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; CHECK-LEAF-DESCENDANTS: <OUTLINED_FUNCTION_0>:
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; CHECK-LEAF-DESCENDANTS-NEXT: li a0, 0x1
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; CHECK-LEAF-DESCENDANTS-NEXT: li a1, 0x2
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; CHECK-LEAF-DESCENDANTS-NEXT: li a2, 0x3
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; CHECK-LEAF-DESCENDANTS-NEXT: li a3, 0x4
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; CHECK-LEAF-DESCENDANTS-NEXT: li a4, 0x5
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; CHECK-LEAF-DESCENDANTS-NEXT: jr t0
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; CHECK-LEAF-DESCENDANTS-NOT: <OUTLINED_FUNCTION_1>:
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; CHECK-NO-CANDIDATE-NOT: <OUTLINED_FUNCTION_0>:
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