derek.holloway
7502bf64a4
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46 lines
1.8 KiB
ArmAsm
46 lines
1.8 KiB
ArmAsm
## Tests TailDuplication for moderate (--tail-duplication=moderate) and aggressive (--tail-duplication=aggressive) modes.
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## The test uses a hot edge to a tail block and checks that a duplicated tail block is created and has the correct predecessor.
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# REQUIRES: system-linux
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# RUN: llvm-mc -filetype=obj -triple aarch64-unknown-unknown %s -o %t.o
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# RUN: link_fdata %s %t.o %t.fdata
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# RUN: %clang %cflags --target=aarch64-unknown-linux %t.o -o %t.exe -Wl,-q
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# RUN: llvm-bolt %t.exe --data %t.fdata --reorder-blocks=none \
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# RUN: --print-finalized --tail-duplication=moderate \
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# RUN: --tail-duplication-minimum-offset=1 -o %t.out | FileCheck %s
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# RUN: llvm-bolt %t.exe --data %t.fdata --reorder-blocks=none \
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# RUN: --print-finalized --tail-duplication=aggressive \
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# RUN: --tail-duplication-minimum-offset=1 -o %t.out \
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# RUN: | FileCheck %s --check-prefix=CHECK-NOLOOP
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# FDATA: 1 main 4 1 main #.BB2# 0 10
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# CHECK: BOLT-INFO: tail duplication modified 1 ({{.*}}%) functions; duplicated 1 blocks (4 bytes) responsible for {{.*}} dynamic executions ({{.*}}% of all block executions)
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# CHECK: BB Layout : .LBB00, .Ltail-dup0, .Ltmp0, .Ltmp1
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# CHECK-LABEL: .LBB00 (1 instructions, align : 1)
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# CHECK-NEXT: Entry Point
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# CHECK-NEXT: Exec Count : {{.*}}
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# CHECK-NEXT: eor w0, w0, w0
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# CHECK-NEXT: Successors: .Ltail-dup0
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## Check that the predecessor of Ltail-dup0 is .LBB00, not itself.
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# CHECK-NOLOOP-LABEL: .Ltail-dup0 (1 instructions, align : 1)
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# CHECK-NOLOOP-NEXT: Exec Count : {{.*}}
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# CHECK-NOLOOP-NEXT: Predecessors: .LBB00
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# CHECK-NOLOOP-NEXT: ret
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.text
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.globl main
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.type main, %function
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main:
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.BB0:
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eor w0, w0, w0
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b .BB2
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.BB1:
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add x0, x0, #1
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.BB2:
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ret
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## Force relocation mode against text.
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.reloc 0, R_AARCH64_NONE
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.Lend:
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