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llvm-project/llvm/test/CodeGen/AArch64/machine-outliner-ordering.mir

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[MachineOutliner] Outline functions by order of benefit Mostly NFC, only change is the order of outlined function names. Loop over the outlined functions instead of walking the candidate list. This is a bit easier to understand. It's far more natural to create a function, then replace all of its occurrences with calls than the other way around. The functions outlined after this do not change, but their names will be decided by their benefit. E.g, OUTLINED_FUNCTION_0 will now always be the most beneficial function, rather than the first one seen. This makes it easier to enforce an ordering on the outlined functions. So, this also adds a test to make sure that the ordering works as expected. llvm-svn: 348414
2018-12-06 05:36:04 +08:00
# RUN: llc -mtriple=aarch64-unknown-unknown -run-pass=machine-outliner \
# RUN: -verify-machineinstrs %s -o - | FileCheck %s
# Ensure that outlined function names appear as expected. Currently, they are
# output in order of benefit.
--- |
define void @should_have_fn2() #0 { ret void }
define void @should_have_fn0() #0 { ret void }
define void @should_have_fn1() #0 { ret void }
attributes #0 = { noredzone optsize minsize }
...
---
name: should_have_fn2
tracksRegLiveness: true
body: |
bb.0:
; CHECK-LABEL: name: should_have_fn2
; CHECK-NOT: OUTLINED_FUNCTION_1
; CHECK-NOT: OUTLINED_FUNCTION_0
; CHECK: OUTLINED_FUNCTION_2
$w0 = ORRWri $wzr, 1
$w0 = ORRWri $wzr, 1
$w0 = ORRWri $wzr, 1
bb.1:
; CHECK-DAG: OUTLINED_FUNCTION_2
$w0 = ORRWri $wzr, 1
$w0 = ORRWri $wzr, 1
$w0 = ORRWri $wzr, 1
bb.2:
; CHECK-DAG: OUTLINED_FUNCTION_2
$w0 = ORRWri $wzr, 1
$w0 = ORRWri $wzr, 1
$w0 = ORRWri $wzr, 1
bb.3:
; CHECK-DAG: OUTLINED_FUNCTION_2
$w0 = ORRWri $wzr, 1
$w0 = ORRWri $wzr, 1
$w0 = ORRWri $wzr, 1
bb.4:
RET undef $lr
...
---
name: should_have_fn0
tracksRegLiveness: true
body: |
bb.0:
; CHECK-LABEL: name: should_have_fn0
; CHECK-NOT: OUTLINED_FUNCTION_1
; CHECK-NOT: OUTLINED_FUNCTION_2
; CHECK: OUTLINED_FUNCTION_0
$w1 = ORRWri $wzr, 1
$w1 = ORRWri $wzr, 1
$w1 = ORRWri $wzr, 1
$w1 = ORRWri $wzr, 1
$w1 = ORRWri $wzr, 1
bb.1:
; CHECK-DAG: OUTLINED_FUNCTION_0
$w1 = ORRWri $wzr, 1
$w1 = ORRWri $wzr, 1
$w1 = ORRWri $wzr, 1
$w1 = ORRWri $wzr, 1
$w1 = ORRWri $wzr, 1
bb.3:
; CHECK-DAG: OUTLINED_FUNCTION_0
$w1 = ORRWri $wzr, 1
$w1 = ORRWri $wzr, 1
$w1 = ORRWri $wzr, 1
$w1 = ORRWri $wzr, 1
$w1 = ORRWri $wzr, 1
bb.4:
RET undef $lr
...
---
name: should_have_fn1
tracksRegLiveness: true
body: |
bb.0:
; CHECK-LABEL: name: should_have_fn1
; CHECK-NOT: OUTLINED_FUNCTION_0
; CHECK-NOT: OUTLINED_FUNCTION_2
; CHECK: OUTLINED_FUNCTION_1
$w2 = ORRWri $wzr, 1
$w2 = ORRWri $wzr, 1
$w2 = ORRWri $wzr, 1
$w2 = ORRWri $wzr, 1
bb.1:
; CHECK-DAG: OUTLINED_FUNCTION_1
$w2 = ORRWri $wzr, 1
$w2 = ORRWri $wzr, 1
$w2 = ORRWri $wzr, 1
$w2 = ORRWri $wzr, 1
bb.3:
; CHECK-DAG: OUTLINED_FUNCTION_1
$w2 = ORRWri $wzr, 1
$w2 = ORRWri $wzr, 1
$w2 = ORRWri $wzr, 1
$w2 = ORRWri $wzr, 1
bb.4:
RET undef $lr