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llvm-project/llvm/test/Transforms/SimplifyCFG/preserve-branchweights.ll

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add minimal test to show dropped metadata llvm-svn: 268141
2016-04-30 08:12:54 +08:00
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
Update the branch weight metadata when reversing the order of a branch. llvm-svn: 147280
2011-12-27 04:54:14 +08:00
; RUN: opt -simplifycfg -S -o - < %s | FileCheck %s
declare void @helper(i32)
define void @test1(i1 %a, i1 %b) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3@$FUNC(/g" $TEMP done mv $TEMP $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @test1(
Update the branch weight metadata when reversing the order of a branch. llvm-svn: 147280
2011-12-27 04:54:14 +08:00
entry:
br i1 %a, label %Y, label %X, !prof !0
; CHECK: br i1 %or.cond, label %Z, label %Y, !prof !0
Teach simplifycfg to recompute branch weights when merging some branches, and to discard weights when appropriate. Still more to do (and a new TODO), but it's a start! llvm-svn: 147286
2011-12-27 12:31:52 +08:00
X:
%c = or i1 %b, false
br i1 %c, label %Z, label %Y, !prof !1
Y:
call void @helper(i32 0)
ret void
Z:
call void @helper(i32 1)
ret void
}
Add check for "branch_weights" with prof metadata While we're here, fix the comment and variable names to make it clear that these are raw weights, not percentages. llvm-svn: 267491
2016-04-26 07:15:16 +08:00
; Make sure the metadata name string is "branch_weights" before propagating it.
define void @fake_weights(i1 %a, i1 %b) {
; CHECK-LABEL: @fake_weights(
entry:
br i1 %a, label %Y, label %X, !prof !12
; CHECK: %or.cond = and i1 %a.not, %c
Follow-up patch of http://reviews.llvm.org/D19948 to handle missing profiles when simplifying CFG. Summary: Set default branch weight to 1:1 if one of the branch has profile missing when simplifying CFG. Reviewers: spatel, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: http://reviews.llvm.org/D20307 llvm-svn: 269995
2016-05-19 06:41:03 +08:00
; CHECK-NEXT: br i1 %or.cond, label %Z, label %Y, !prof !1
Add check for "branch_weights" with prof metadata While we're here, fix the comment and variable names to make it clear that these are raw weights, not percentages. llvm-svn: 267491
2016-04-26 07:15:16 +08:00
; CHECK: Y:
X:
%c = or i1 %b, false
br i1 %c, label %Z, label %Y, !prof !1
Y:
call void @helper(i32 0)
ret void
Z:
call void @helper(i32 1)
ret void
}
Teach simplifycfg to recompute branch weights when merging some branches, and to discard weights when appropriate. Still more to do (and a new TODO), but it's a start! llvm-svn: 147286
2011-12-27 12:31:52 +08:00
define void @test2(i1 %a, i1 %b) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3@$FUNC(/g" $TEMP done mv $TEMP $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @test2(
Teach simplifycfg to recompute branch weights when merging some branches, and to discard weights when appropriate. Still more to do (and a new TODO), but it's a start! llvm-svn: 147286
2011-12-27 12:31:52 +08:00
entry:
br i1 %a, label %X, label %Y, !prof !1
Follow-up patch of http://reviews.llvm.org/D19948 to handle missing profiles when simplifying CFG. Summary: Set default branch weight to 1:1 if one of the branch has profile missing when simplifying CFG. Reviewers: spatel, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: http://reviews.llvm.org/D20307 llvm-svn: 269995
2016-05-19 06:41:03 +08:00
; CHECK: br i1 %or.cond, label %Z, label %Y, !prof !2
Teach simplifycfg to recompute branch weights when merging some branches, and to discard weights when appropriate. Still more to do (and a new TODO), but it's a start! llvm-svn: 147286
2011-12-27 12:31:52 +08:00
; CHECK-NOT: !prof
X:
%c = or i1 %b, false
br i1 %c, label %Z, label %Y, !prof !2
Y:
call void @helper(i32 0)
ret void
Z:
call void @helper(i32 1)
ret void
}
define void @test3(i1 %a, i1 %b) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3@$FUNC(/g" $TEMP done mv $TEMP $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @test3(
Follow-up patch of http://reviews.llvm.org/D19948 to handle missing profiles when simplifying CFG. Summary: Set default branch weight to 1:1 if one of the branch has profile missing when simplifying CFG. Reviewers: spatel, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: http://reviews.llvm.org/D20307 llvm-svn: 269995
2016-05-19 06:41:03 +08:00
; CHECK: br i1 %or.cond, label %Z, label %Y, !prof !1
Teach simplifycfg to recompute branch weights when merging some branches, and to discard weights when appropriate. Still more to do (and a new TODO), but it's a start! llvm-svn: 147286
2011-12-27 12:31:52 +08:00
entry:
br i1 %a, label %X, label %Y, !prof !1
Update the branch weight metadata when reversing the order of a branch. llvm-svn: 147280
2011-12-27 04:54:14 +08:00
X:
%c = or i1 %b, false
br i1 %c, label %Z, label %Y
Y:
call void @helper(i32 0)
ret void
Z:
call void @helper(i32 1)
ret void
}
Teach simplifycfg to recompute branch weights when merging some branches, and to discard weights when appropriate. Still more to do (and a new TODO), but it's a start! llvm-svn: 147286
2011-12-27 12:31:52 +08:00
define void @test4(i1 %a, i1 %b) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3@$FUNC(/g" $TEMP done mv $TEMP $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @test4(
Follow-up patch of http://reviews.llvm.org/D19948 to handle missing profiles when simplifying CFG. Summary: Set default branch weight to 1:1 if one of the branch has profile missing when simplifying CFG. Reviewers: spatel, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: http://reviews.llvm.org/D20307 llvm-svn: 269995
2016-05-19 06:41:03 +08:00
; CHECK: br i1 %or.cond, label %Z, label %Y, !prof !1
Teach simplifycfg to recompute branch weights when merging some branches, and to discard weights when appropriate. Still more to do (and a new TODO), but it's a start! llvm-svn: 147286
2011-12-27 12:31:52 +08:00
entry:
br i1 %a, label %X, label %Y
X:
%c = or i1 %b, false
br i1 %c, label %Z, label %Y, !prof !1
Y:
call void @helper(i32 0)
ret void
Z:
call void @helper(i32 1)
ret void
}
PGO: preserve branch-weight metadata when removing a case which jumps to the default target. llvm-svn: 163724
2012-09-13 01:04:11 +08:00
;; test5 - The case where it jumps to the default target will be removed.
define void @test5(i32 %M, i32 %N) nounwind uwtable {
entry:
switch i32 %N, label %sw2 [
i32 1, label %sw2
i32 2, label %sw.bb
i32 3, label %sw.bb1
], !prof !3
test: Prefer CHECK-LABEL to CHECK in branchweight tests llvm-svn: 197789
2013-12-20 16:21:24 +08:00
; CHECK-LABEL: @test5(
PGO: preserve branch-weight metadata when removing a case which jumps to the default target. llvm-svn: 163724
2012-09-13 01:04:11 +08:00
; CHECK: switch i32 %N, label %sw2 [
; CHECK: i32 3, label %sw.bb1
; CHECK: i32 2, label %sw.bb
Follow-up patch of http://reviews.llvm.org/D19948 to handle missing profiles when simplifying CFG. Summary: Set default branch weight to 1:1 if one of the branch has profile missing when simplifying CFG. Reviewers: spatel, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: http://reviews.llvm.org/D20307 llvm-svn: 269995
2016-05-19 06:41:03 +08:00
; CHECK: ], !prof !3
PGO: preserve branch-weight metadata when removing a case which jumps to the default target. llvm-svn: 163724
2012-09-13 01:04:11 +08:00
sw.bb:
call void @helper(i32 0)
br label %sw.epilog
sw.bb1:
call void @helper(i32 1)
br label %sw.epilog
sw2:
call void @helper(i32 2)
br label %sw.epilog
sw.epilog:
ret void
}
PGO: preserve branch-weight metadata when simplifying a switch with a single case to a conditional branch and when removing dead cases. llvm-svn: 163942
2012-09-15 05:53:06 +08:00
;; test6 - Some cases of the second switch are pruned during optimization.
;; Then the second switch will be converted to a branch, finally, the first
;; switch and the branch will be merged into a single switch.
define void @test6(i32 %M, i32 %N) nounwind uwtable {
entry:
switch i32 %N, label %sw2 [
i32 1, label %sw2
i32 2, label %sw.bb
i32 3, label %sw.bb1
], !prof !4
test: Prefer CHECK-LABEL to CHECK in branchweight tests llvm-svn: 197789
2013-12-20 16:21:24 +08:00
; CHECK-LABEL: @test6(
PGO: preserve branch-weight metadata when simplifying a switch with a single case to a conditional branch and when removing dead cases. llvm-svn: 163942
2012-09-15 05:53:06 +08:00
; CHECK: switch i32 %N, label %sw.epilog
; CHECK: i32 3, label %sw.bb1
; CHECK: i32 2, label %sw.bb
; CHECK: i32 4, label %sw.bb5
Follow-up patch of http://reviews.llvm.org/D19948 to handle missing profiles when simplifying CFG. Summary: Set default branch weight to 1:1 if one of the branch has profile missing when simplifying CFG. Reviewers: spatel, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: http://reviews.llvm.org/D20307 llvm-svn: 269995
2016-05-19 06:41:03 +08:00
; CHECK: ], !prof !4
PGO: preserve branch-weight metadata when simplifying a switch with a single case to a conditional branch and when removing dead cases. llvm-svn: 163942
2012-09-15 05:53:06 +08:00
sw.bb:
call void @helper(i32 0)
br label %sw.epilog
sw.bb1:
call void @helper(i32 1)
br label %sw.epilog
sw2:
;; Here "case 2" is invalidated since the default case of the first switch
;; does not include "case 2".
switch i32 %N, label %sw.epilog [
i32 2, label %sw.bb4
i32 4, label %sw.bb5
], !prof !5
sw.bb4:
call void @helper(i32 2)
br label %sw.epilog
sw.bb5:
call void @helper(i32 3)
br label %sw.epilog
sw.epilog:
ret void
}
PGO: preserve branch-weight metadata when simplifying two branches with a common destination. Updated previous implementation to fix a case not covered: // PBI: br i1 %x, TrueDest, BB // BI: br i1 %y, TrueDest, FalseDest The other case was handled correctly. // PBI: br i1 %x, BB, FalseDest // BI: br i1 %y, TrueDest, FalseDest Also tried to use 64-bit arithmetic instead of APInt with scale to simplify the computation. Let me know if you have other opinions about this. llvm-svn: 163954
2012-09-15 08:39:57 +08:00
;; This test is based on test1 but swapped the targets of the second branch.
define void @test1_swap(i1 %a, i1 %b) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3@$FUNC(/g" $TEMP done mv $TEMP $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @test1_swap(
PGO: preserve branch-weight metadata when simplifying two branches with a common destination. Updated previous implementation to fix a case not covered: // PBI: br i1 %x, TrueDest, BB // BI: br i1 %y, TrueDest, FalseDest The other case was handled correctly. // PBI: br i1 %x, BB, FalseDest // BI: br i1 %y, TrueDest, FalseDest Also tried to use 64-bit arithmetic instead of APInt with scale to simplify the computation. Let me know if you have other opinions about this. llvm-svn: 163954
2012-09-15 08:39:57 +08:00
entry:
br i1 %a, label %Y, label %X, !prof !0
Follow-up patch of http://reviews.llvm.org/D19948 to handle missing profiles when simplifying CFG. Summary: Set default branch weight to 1:1 if one of the branch has profile missing when simplifying CFG. Reviewers: spatel, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: http://reviews.llvm.org/D20307 llvm-svn: 269995
2016-05-19 06:41:03 +08:00
; CHECK: br i1 %or.cond, label %Y, label %Z, !prof !5
PGO: preserve branch-weight metadata when simplifying two branches with a common destination. Updated previous implementation to fix a case not covered: // PBI: br i1 %x, TrueDest, BB // BI: br i1 %y, TrueDest, FalseDest The other case was handled correctly. // PBI: br i1 %x, BB, FalseDest // BI: br i1 %y, TrueDest, FalseDest Also tried to use 64-bit arithmetic instead of APInt with scale to simplify the computation. Let me know if you have other opinions about this. llvm-svn: 163954
2012-09-15 08:39:57 +08:00
X:
%c = or i1 %b, false
br i1 %c, label %Y, label %Z, !prof !1
Y:
call void @helper(i32 0)
ret void
Z:
call void @helper(i32 1)
ret void
}
PGO: preserve branch-weight metadata when simplifying two branches with a common destination in SimplifyCondBranchToCondBranch. llvm-svn: 164054
2012-09-18 05:30:40 +08:00
define void @test7(i1 %a, i1 %b) {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3@$FUNC(/g" $TEMP done mv $TEMP $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @test7(
PGO: preserve branch-weight metadata when simplifying two branches with a common destination in SimplifyCondBranchToCondBranch. llvm-svn: 164054
2012-09-18 05:30:40 +08:00
entry:
%c = or i1 %b, false
br i1 %a, label %Y, label %X, !prof !0
Follow-up patch of http://reviews.llvm.org/D19948 to handle missing profiles when simplifying CFG. Summary: Set default branch weight to 1:1 if one of the branch has profile missing when simplifying CFG. Reviewers: spatel, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: http://reviews.llvm.org/D20307 llvm-svn: 269995
2016-05-19 06:41:03 +08:00
; CHECK: br i1 %brmerge, label %Y, label %Z, !prof !6
PGO: preserve branch-weight metadata when simplifying two branches with a common destination in SimplifyCondBranchToCondBranch. llvm-svn: 164054
2012-09-18 05:30:40 +08:00
X:
br i1 %c, label %Y, label %Z, !prof !6
Y:
call void @helper(i32 0)
ret void
Z:
call void @helper(i32 1)
ret void
}
PGO: preserve branch-weight metadata when simplifying SwitchOnSelect. llvm-svn: 164068
2012-09-18 06:28:55 +08:00
; Test basic folding to a conditional branch.
define void @test8(i64 %x, i64 %y) nounwind {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3@$FUNC(/g" $TEMP done mv $TEMP $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @test8(
PGO: preserve branch-weight metadata when simplifying SwitchOnSelect. llvm-svn: 164068
2012-09-18 06:28:55 +08:00
entry:
%lt = icmp slt i64 %x, %y
Follow-up patch of http://reviews.llvm.org/D19948 to handle missing profiles when simplifying CFG. Summary: Set default branch weight to 1:1 if one of the branch has profile missing when simplifying CFG. Reviewers: spatel, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: http://reviews.llvm.org/D20307 llvm-svn: 269995
2016-05-19 06:41:03 +08:00
; CHECK: br i1 %lt, label %a, label %b, !prof !7
PGO: preserve branch-weight metadata when simplifying SwitchOnSelect. llvm-svn: 164068
2012-09-18 06:28:55 +08:00
%qux = select i1 %lt, i32 0, i32 2
switch i32 %qux, label %bees [
i32 0, label %a
i32 1, label %b
i32 2, label %b
], !prof !7
a:
call void @helper(i32 0) nounwind
ret void
b:
call void @helper(i32 1) nounwind
ret void
bees:
call void @helper(i32 2) nounwind
ret void
}
PGO: preserve branch-weight metadata when simplifying Switch Hanlde the case when we split the default edge if the default target has "icmp" and unconditinal branch. llvm-svn: 164076
2012-09-18 07:07:43 +08:00
; Test edge splitting when the default target has icmp and unconditinal
; branch
define i1 @test9(i32 %x, i32 %y) nounwind {
Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change. This update was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$NAME" if ! grep -q "^; *RUN: *llc" $NAME; then TEMP=`mktemp -t temp` cp $NAME $TEMP sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \ while read FUNC; do sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3@$FUNC(/g" $TEMP done mv $TEMP $NAME fi done llvm-svn: 186268
2013-07-14 09:42:54 +08:00
; CHECK-LABEL: @test9(
PGO: preserve branch-weight metadata when simplifying Switch Hanlde the case when we split the default edge if the default target has "icmp" and unconditinal branch. llvm-svn: 164076
2012-09-18 07:07:43 +08:00
entry:
switch i32 %x, label %bees [
i32 0, label %a
i32 1, label %end
i32 2, label %end
], !prof !7
; CHECK: switch i32 %x, label %bees [
; CHECK: i32 0, label %a
; CHECK: i32 1, label %end
; CHECK: i32 2, label %end
; CHECK: i32 92, label %end
Follow-up patch of http://reviews.llvm.org/D19948 to handle missing profiles when simplifying CFG. Summary: Set default branch weight to 1:1 if one of the branch has profile missing when simplifying CFG. Reviewers: spatel, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: http://reviews.llvm.org/D20307 llvm-svn: 269995
2016-05-19 06:41:03 +08:00
; CHECK: ], !prof !8
PGO: preserve branch-weight metadata when simplifying Switch Hanlde the case when we split the default edge if the default target has "icmp" and unconditinal branch. llvm-svn: 164076
2012-09-18 07:07:43 +08:00
a:
call void @helper(i32 0) nounwind
%reta = icmp slt i32 %x, %y
ret i1 %reta
bees:
%tmp = icmp eq i32 %x, 92
br label %end
end:
; CHECK: end:
; CHECK: %ret = phi i1 [ true, %entry ], [ false, %bees ], [ true, %entry ], [ true, %entry ]
%ret = phi i1 [ true, %entry ], [%tmp, %bees], [true, %entry]
call void @helper(i32 2) nounwind
ret i1 %ret
}
PGO: preserve branch-weight metadata when simplifying Switch to a sub, an icmp and a conditional branch; also when removing dead cases from a switch. llvm-svn: 164084
2012-09-18 08:47:33 +08:00
define void @test10(i32 %x) nounwind readnone ssp noredzone {
entry:
switch i32 %x, label %lor.rhs [
i32 2, label %lor.end
i32 1, label %lor.end
i32 3, label %lor.end
], !prof !7
lor.rhs:
call void @helper(i32 1) nounwind
ret void
lor.end:
call void @helper(i32 0) nounwind
ret void
test: Prefer CHECK-LABEL to CHECK in branchweight tests llvm-svn: 197789
2013-12-20 16:21:24 +08:00
; CHECK-LABEL: @test10(
PGO: preserve branch-weight metadata when simplifying Switch to a sub, an icmp and a conditional branch; also when removing dead cases from a switch. llvm-svn: 164084
2012-09-18 08:47:33 +08:00
; CHECK: %x.off = add i32 %x, -1
; CHECK: %switch = icmp ult i32 %x.off, 3
Follow-up patch of http://reviews.llvm.org/D19948 to handle missing profiles when simplifying CFG. Summary: Set default branch weight to 1:1 if one of the branch has profile missing when simplifying CFG. Reviewers: spatel, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: http://reviews.llvm.org/D20307 llvm-svn: 269995
2016-05-19 06:41:03 +08:00
; CHECK: br i1 %switch, label %lor.end, label %lor.rhs, !prof !9
PGO: preserve branch-weight metadata when simplifying Switch to a sub, an icmp and a conditional branch; also when removing dead cases from a switch. llvm-svn: 164084
2012-09-18 08:47:33 +08:00
}
; Remove dead cases from the switch.
define void @test11(i32 %x) nounwind {
%i = shl i32 %x, 1
switch i32 %i, label %a [
i32 21, label %b
i32 24, label %c
], !prof !8
test: Prefer CHECK-LABEL to CHECK in branchweight tests llvm-svn: 197789
2013-12-20 16:21:24 +08:00
; CHECK-LABEL: @test11(
PGO: preserve branch-weight metadata when simplifying Switch to a sub, an icmp and a conditional branch; also when removing dead cases from a switch. llvm-svn: 164084
2012-09-18 08:47:33 +08:00
; CHECK: %cond = icmp eq i32 %i, 24
Follow-up patch of http://reviews.llvm.org/D19948 to handle missing profiles when simplifying CFG. Summary: Set default branch weight to 1:1 if one of the branch has profile missing when simplifying CFG. Reviewers: spatel, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: http://reviews.llvm.org/D20307 llvm-svn: 269995
2016-05-19 06:41:03 +08:00
; CHECK: br i1 %cond, label %c, label %a, !prof !10
PGO: preserve branch-weight metadata when simplifying Switch to a sub, an icmp and a conditional branch; also when removing dead cases from a switch. llvm-svn: 164084
2012-09-18 08:47:33 +08:00
a:
call void @helper(i32 0) nounwind
ret void
b:
call void @helper(i32 1) nounwind
ret void
c:
call void @helper(i32 2) nounwind
ret void
}
Transforms: Don't create bad branch weights when folding a switch This avoids creating branch weight metadata of length one when we fold cases into the default of a switch instruction, which was triggering an assert. llvm-svn: 196845
2013-12-10 08:13:41 +08:00
;; test12 - Don't crash if the whole switch is removed
define void @test12(i32 %M, i32 %N) nounwind uwtable {
entry:
switch i32 %N, label %sw.bb [
i32 1, label %sw.bb
], !prof !9
test: Prefer CHECK-LABEL to CHECK in branchweight tests llvm-svn: 197789
2013-12-20 16:21:24 +08:00
; CHECK-LABEL: @test12(
test: Make a branchweight test more specific llvm-svn: 197790
2013-12-20 16:21:27 +08:00
; CHECK-NEXT: entry:
; CHECK-NEXT: call void @helper
; CHECK-NEXT: ret void
Transforms: Don't create bad branch weights when folding a switch This avoids creating branch weight metadata of length one when we fold cases into the default of a switch instruction, which was triggering an assert. llvm-svn: 196845
2013-12-10 08:13:41 +08:00
sw.bb:
call void @helper(i32 0)
br label %sw.epilog
sw.epilog:
ret void
}
Transforms: Don't create bad weights when eliminating dead cases If we happen to eliminate every case in a switch that has branch weights, we currently try to create metadata for the one remaining branch, triggering an assert. Instead, we need to check that the metadata we're trying to create is sensible. llvm-svn: 197791
2013-12-20 16:21:30 +08:00
;; If every case is dead, make sure they are all removed. This used to
;; crash trying to merge the metadata.
define void @test13(i32 %x) nounwind {
entry:
%i = shl i32 %x, 1
switch i32 %i, label %a [
i32 21, label %b
i32 25, label %c
], !prof !8
; CHECK-LABEL: @test13(
; CHECK-NEXT: entry:
; CHECK-NEXT: call void @helper
; CHECK-NEXT: ret void
a:
call void @helper(i32 0) nounwind
ret void
b:
call void @helper(i32 1) nounwind
ret void
c:
call void @helper(i32 2) nounwind
ret void
}
PGO branch weight: keep halving the weights until they can fit into uint32. When folding branches to common destination, the updated branch weights can exceed uint32 by more than factor of 2. We should keep halving the weights until they can fit into uint32. llvm-svn: 200262
2014-01-28 07:39:03 +08:00
;; When folding branches to common destination, the updated branch weights
;; can exceed uint32 by more than factor of 2. We should keep halving the
;; weights until they can fit into uint32.
@max_regno = common global i32 0, align 4
define void @test14(i32* %old, i32 %final) {
; CHECK-LABEL: @test14
Follow-up patch of http://reviews.llvm.org/D19948 to handle missing profiles when simplifying CFG. Summary: Set default branch weight to 1:1 if one of the branch has profile missing when simplifying CFG. Reviewers: spatel, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: http://reviews.llvm.org/D20307 llvm-svn: 269995
2016-05-19 06:41:03 +08:00
; CHECK: br i1 %or.cond, label %for.exit, label %for.inc, !prof !11
PGO branch weight: keep halving the weights until they can fit into uint32. When folding branches to common destination, the updated branch weights can exceed uint32 by more than factor of 2. We should keep halving the weights until they can fit into uint32. llvm-svn: 200262
2014-01-28 07:39:03 +08:00
for.cond:
br label %for.cond2
for.cond2:
%i.1 = phi i32 [ %inc19, %for.inc ], [ 0, %for.cond ]
%bit.0 = phi i32 [ %shl, %for.inc ], [ 1, %for.cond ]
%tobool = icmp eq i32 %bit.0, 0
br i1 %tobool, label %for.exit, label %for.body3, !prof !10
for.body3:
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction Essentially the same as the GEP change in r230786. A similar migration script can be used to update test cases, though a few more test case improvements/changes were required this time around: (r229269-r229278) import fileinput import sys import re pat = re.compile(r"((?:=|:|^)\s*load (?:atomic )?(?:volatile )?(.*?))(| addrspace\(\d+\) *)\*($| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$)") for line in sys.stdin: sys.stdout.write(re.sub(pat, r"\1, \2\3*\4", line)) Reviewers: rafael, dexonsmith, grosser Differential Revision: http://reviews.llvm.org/D7649 llvm-svn: 230794
2015-02-28 05:17:42 +08:00
%v3 = load i32, i32* @max_regno, align 4
PGO branch weight: keep halving the weights until they can fit into uint32. When folding branches to common destination, the updated branch weights can exceed uint32 by more than factor of 2. We should keep halving the weights until they can fit into uint32. llvm-svn: 200262
2014-01-28 07:39:03 +08:00
%cmp4 = icmp eq i32 %i.1, %v3
br i1 %cmp4, label %for.exit, label %for.inc, !prof !11
for.inc:
%shl = shl i32 %bit.0, 1
%inc19 = add nsw i32 %i.1, 1
br label %for.cond2
for.exit:
ret void
}
[SimplifyCFG] propagate branch metadata when creating select llvm-svn: 267624
2016-04-27 07:15:48 +08:00
; Don't drop the metadata.
define i32 @HoistThenElseCodeToIf(i32 %n) {
; CHECK-LABEL: @HoistThenElseCodeToIf(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i32 %n, 0
Follow-up patch of http://reviews.llvm.org/D19948 to handle missing profiles when simplifying CFG. Summary: Set default branch weight to 1:1 if one of the branch has profile missing when simplifying CFG. Reviewers: spatel, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: http://reviews.llvm.org/D20307 llvm-svn: 269995
2016-05-19 06:41:03 +08:00
; CHECK-NEXT: [[DOT:%.*]] = select i1 [[TOBOOL]], i32 1, i32 234, !prof !12
[SimplifyCFG] propagate branch metadata when creating select llvm-svn: 267624
2016-04-27 07:15:48 +08:00
; CHECK-NEXT: ret i32 [[DOT]]
;
entry:
%tobool = icmp eq i32 %n, 0
br i1 %tobool, label %if, label %else, !prof !0
if:
br label %return
else:
br label %return
return:
%retval.0 = phi i32 [ 1, %if ], [ 234, %else ]
ret i32 %retval.0
}
[SimplifyCFG] propagate branch metadata when creating select (retry r268550 / r268751 with possible fix) Retrying r268550/r268751 which were reverted at r268577/r268765 due a memory sanitizer failure. I have not been able to reproduce that failure, but I've taken another guess at fixing the problem in this version of the patch and will watch for another failure. Original commit message: Unlike earlier similar fixes, we need to recalculate the branch weights in this case. Differential Revision: http://reviews.llvm.org/D19674 llvm-svn: 268767
2016-05-07 02:07:46 +08:00
; The selects should have freshly calculated branch weights.
add minimal test to show dropped metadata llvm-svn: 268141
2016-04-30 08:12:54 +08:00
define i32 @SimplifyCondBranchToCondBranch(i1 %cmpa, i1 %cmpb) {
; CHECK-LABEL: @SimplifyCondBranchToCondBranch(
; CHECK-NEXT: block1:
[SimplifyCFG] propagate branch metadata when creating select (retry r268550 / r268751 with possible fix) Retrying r268550/r268751 which were reverted at r268577/r268765 due a memory sanitizer failure. I have not been able to reproduce that failure, but I've taken another guess at fixing the problem in this version of the patch and will watch for another failure. Original commit message: Unlike earlier similar fixes, we need to recalculate the branch weights in this case. Differential Revision: http://reviews.llvm.org/D19674 llvm-svn: 268767
2016-05-07 02:07:46 +08:00
; CHECK-NEXT: [[BRMERGE:%.*]] = or i1 %cmpa, %cmpb
Follow-up patch of http://reviews.llvm.org/D19948 to handle missing profiles when simplifying CFG. Summary: Set default branch weight to 1:1 if one of the branch has profile missing when simplifying CFG. Reviewers: spatel, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: http://reviews.llvm.org/D20307 llvm-svn: 269995
2016-05-19 06:41:03 +08:00
; CHECK-NEXT: [[DOTMUX:%.*]] = select i1 %cmpa, i32 0, i32 2, !prof !13
; CHECK-NEXT: [[OUTVAL:%.*]] = select i1 [[BRMERGE]], i32 [[DOTMUX]], i32 1, !prof !14
add minimal test to show dropped metadata llvm-svn: 268141
2016-04-30 08:12:54 +08:00
; CHECK-NEXT: ret i32 [[OUTVAL]]
;
block1:
[SimplifyCFG] propagate branch metadata when creating select (retry r268550 / r268751 with possible fix) Retrying r268550/r268751 which were reverted at r268577/r268765 due a memory sanitizer failure. I have not been able to reproduce that failure, but I've taken another guess at fixing the problem in this version of the patch and will watch for another failure. Original commit message: Unlike earlier similar fixes, we need to recalculate the branch weights in this case. Differential Revision: http://reviews.llvm.org/D19674 llvm-svn: 268767
2016-05-07 02:07:46 +08:00
br i1 %cmpa, label %block3, label %block2, !prof !13
add minimal test to show dropped metadata llvm-svn: 268141
2016-04-30 08:12:54 +08:00
block2:
[SimplifyCFG] propagate branch metadata when creating select (retry r268550 / r268751 with possible fix) Retrying r268550/r268751 which were reverted at r268577/r268765 due a memory sanitizer failure. I have not been able to reproduce that failure, but I've taken another guess at fixing the problem in this version of the patch and will watch for another failure. Original commit message: Unlike earlier similar fixes, we need to recalculate the branch weights in this case. Differential Revision: http://reviews.llvm.org/D19674 llvm-svn: 268767
2016-05-07 02:07:46 +08:00
br i1 %cmpb, label %block3, label %exit, !prof !14
block3:
%cowval = phi i32 [ 2, %block2 ], [ 0, %block1 ]
br label %exit
exit:
%outval = phi i32 [ %cowval, %block3 ], [ 1, %block2 ]
ret i32 %outval
}
; Swap the operands of the compares to verify that the weights update correctly.
define i32 @SimplifyCondBranchToCondBranchSwap(i1 %cmpa, i1 %cmpb) {
; CHECK-LABEL: @SimplifyCondBranchToCondBranchSwap(
; CHECK-NEXT: block1:
; CHECK-NEXT: [[CMPA_NOT:%.*]] = xor i1 %cmpa, true
; CHECK-NEXT: [[CMPB_NOT:%.*]] = xor i1 %cmpb, true
; CHECK-NEXT: [[BRMERGE:%.*]] = or i1 [[CMPA_NOT]], [[CMPB_NOT]]
Follow-up patch of http://reviews.llvm.org/D19948 to handle missing profiles when simplifying CFG. Summary: Set default branch weight to 1:1 if one of the branch has profile missing when simplifying CFG. Reviewers: spatel, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: http://reviews.llvm.org/D20307 llvm-svn: 269995
2016-05-19 06:41:03 +08:00
; CHECK-NEXT: [[DOTMUX:%.*]] = select i1 [[CMPA_NOT]], i32 0, i32 2, !prof !15
; CHECK-NEXT: [[OUTVAL:%.*]] = select i1 [[BRMERGE]], i32 [[DOTMUX]], i32 1, !prof !16
[SimplifyCFG] propagate branch metadata when creating select (retry r268550 / r268751 with possible fix) Retrying r268550/r268751 which were reverted at r268577/r268765 due a memory sanitizer failure. I have not been able to reproduce that failure, but I've taken another guess at fixing the problem in this version of the patch and will watch for another failure. Original commit message: Unlike earlier similar fixes, we need to recalculate the branch weights in this case. Differential Revision: http://reviews.llvm.org/D19674 llvm-svn: 268767
2016-05-07 02:07:46 +08:00
; CHECK-NEXT: ret i32 [[OUTVAL]]
;
block1:
br i1 %cmpa, label %block2, label %block3, !prof !13
block2:
br i1 %cmpb, label %exit, label %block3, !prof !14
add minimal test to show dropped metadata llvm-svn: 268141
2016-04-30 08:12:54 +08:00
block3:
%cowval = phi i32 [ 2, %block2 ], [ 0, %block1 ]
br label %exit
exit:
%outval = phi i32 [ %cowval, %block3 ], [ 1, %block2 ]
ret i32 %outval
}
Propagate branch metadata when some branch probability is missing. Summary: In sample profile, some branches may have profile missing due to profile inaccuracy. We want existing branch probability still valid after propagation. Reviewers: hfinkel, davidxl, spatel Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D19948 llvm-svn: 269137
2016-05-11 07:07:19 +08:00
define i32 @SimplifyCondBranchToCondBranchSwapMissingWeight(i1 %cmpa, i1 %cmpb) {
; CHECK-LABEL: @SimplifyCondBranchToCondBranchSwapMissingWeight(
; CHECK-NEXT: block1:
; CHECK-NEXT: [[CMPA_NOT:%.*]] = xor i1 %cmpa, true
; CHECK-NEXT: [[CMPB_NOT:%.*]] = xor i1 %cmpb, true
; CHECK-NEXT: [[BRMERGE:%.*]] = or i1 [[CMPA_NOT]], [[CMPB_NOT]]
Follow-up patch of http://reviews.llvm.org/D19948 to handle missing profiles when simplifying CFG. Summary: Set default branch weight to 1:1 if one of the branch has profile missing when simplifying CFG. Reviewers: spatel, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: http://reviews.llvm.org/D20307 llvm-svn: 269995
2016-05-19 06:41:03 +08:00
; CHECK-NEXT: [[DOTMUX:%.*]] = select i1 [[CMPA_NOT]], i32 0, i32 2, !prof !17
; CHECK-NEXT: [[OUTVAL:%.*]] = select i1 [[BRMERGE]], i32 [[DOTMUX]], i32 1, !prof !18
Propagate branch metadata when some branch probability is missing. Summary: In sample profile, some branches may have profile missing due to profile inaccuracy. We want existing branch probability still valid after propagation. Reviewers: hfinkel, davidxl, spatel Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D19948 llvm-svn: 269137
2016-05-11 07:07:19 +08:00
; CHECK-NEXT: ret i32 [[OUTVAL]]
;
block1:
br i1 %cmpa, label %block2, label %block3, !prof !13
block2:
br i1 %cmpb, label %exit, label %block3
block3:
%cowval = phi i32 [ 2, %block2 ], [ 0, %block1 ]
br label %exit
exit:
%outval = phi i32 [ %cowval, %block3 ], [ 1, %block2 ]
ret i32 %outval
}
[SimplifyCFG] propagate branch metadata when creating select llvm-svn: 267624
2016-04-27 07:15:48 +08:00
IR: Make metadata typeless in assembly Now that `Metadata` is typeless, reflect that in the assembly. These are the matching assembly changes for the metadata/value split in r223802. - Only use the `metadata` type when referencing metadata from a call intrinsic -- i.e., only when it's used as a `Value`. - Stop pretending that `ValueAsMetadata` is wrapped in an `MDNode` when referencing it from call intrinsics. So, assembly like this: define @foo(i32 %v) { call void @llvm.foo(metadata !{i32 %v}, metadata !0) call void @llvm.foo(metadata !{i32 7}, metadata !0) call void @llvm.foo(metadata !1, metadata !0) call void @llvm.foo(metadata !3, metadata !0) call void @llvm.foo(metadata !{metadata !3}, metadata !0) ret void, !bar !2 } !0 = metadata !{metadata !2} !1 = metadata !{i32* @global} !2 = metadata !{metadata !3} !3 = metadata !{} turns into this: define @foo(i32 %v) { call void @llvm.foo(metadata i32 %v, metadata !0) call void @llvm.foo(metadata i32 7, metadata !0) call void @llvm.foo(metadata i32* @global, metadata !0) call void @llvm.foo(metadata !3, metadata !0) call void @llvm.foo(metadata !{!3}, metadata !0) ret void, !bar !2 } !0 = !{!2} !1 = !{i32* @global} !2 = !{!3} !3 = !{} I wrote an upgrade script that handled almost all of the tests in llvm and many of the tests in cfe (even handling many `CHECK` lines). I've attached it (or will attach it in a moment if you're speedy) to PR21532 to help everyone update their out-of-tree testcases. This is part of PR21532. llvm-svn: 224257
2014-12-16 03:07:53 +08:00
!0 = !{!"branch_weights", i32 3, i32 5}
!1 = !{!"branch_weights", i32 1, i32 1}
!2 = !{!"branch_weights", i32 1, i32 2}
!3 = !{!"branch_weights", i32 4, i32 3, i32 2, i32 1}
!4 = !{!"branch_weights", i32 4, i32 3, i32 2, i32 1}
!5 = !{!"branch_weights", i32 7, i32 6, i32 5}
!6 = !{!"branch_weights", i32 1, i32 3}
!7 = !{!"branch_weights", i32 33, i32 9, i32 8, i32 7}
!8 = !{!"branch_weights", i32 33, i32 9, i32 8}
!9 = !{!"branch_weights", i32 7, i32 6}
!10 = !{!"branch_weights", i32 672646, i32 21604207}
!11 = !{!"branch_weights", i32 6960, i32 21597248}
Add check for "branch_weights" with prof metadata While we're here, fix the comment and variable names to make it clear that these are raw weights, not percentages. llvm-svn: 267491
2016-04-26 07:15:16 +08:00
!12 = !{!"these_are_not_the_branch_weights_you_are_looking_for", i32 3, i32 5}
[SimplifyCFG] propagate branch metadata when creating select (retry r268550 / r268751 with possible fix) Retrying r268550/r268751 which were reverted at r268577/r268765 due a memory sanitizer failure. I have not been able to reproduce that failure, but I've taken another guess at fixing the problem in this version of the patch and will watch for another failure. Original commit message: Unlike earlier similar fixes, we need to recalculate the branch weights in this case. Differential Revision: http://reviews.llvm.org/D19674 llvm-svn: 268767
2016-05-07 02:07:46 +08:00
!13 = !{!"branch_weights", i32 2, i32 3}
!14 = !{!"branch_weights", i32 4, i32 7}
IR: Make metadata typeless in assembly Now that `Metadata` is typeless, reflect that in the assembly. These are the matching assembly changes for the metadata/value split in r223802. - Only use the `metadata` type when referencing metadata from a call intrinsic -- i.e., only when it's used as a `Value`. - Stop pretending that `ValueAsMetadata` is wrapped in an `MDNode` when referencing it from call intrinsics. So, assembly like this: define @foo(i32 %v) { call void @llvm.foo(metadata !{i32 %v}, metadata !0) call void @llvm.foo(metadata !{i32 7}, metadata !0) call void @llvm.foo(metadata !1, metadata !0) call void @llvm.foo(metadata !3, metadata !0) call void @llvm.foo(metadata !{metadata !3}, metadata !0) ret void, !bar !2 } !0 = metadata !{metadata !2} !1 = metadata !{i32* @global} !2 = metadata !{metadata !3} !3 = metadata !{} turns into this: define @foo(i32 %v) { call void @llvm.foo(metadata i32 %v, metadata !0) call void @llvm.foo(metadata i32 7, metadata !0) call void @llvm.foo(metadata i32* @global, metadata !0) call void @llvm.foo(metadata !3, metadata !0) call void @llvm.foo(metadata !{!3}, metadata !0) ret void, !bar !2 } !0 = !{!2} !1 = !{i32* @global} !2 = !{!3} !3 = !{} I wrote an upgrade script that handled almost all of the tests in llvm and many of the tests in cfe (even handling many `CHECK` lines). I've attached it (or will attach it in a moment if you're speedy) to PR21532 to help everyone update their out-of-tree testcases. This is part of PR21532. llvm-svn: 224257
2014-12-16 03:07:53 +08:00
; CHECK: !0 = !{!"branch_weights", i32 5, i32 11}
Follow-up patch of http://reviews.llvm.org/D19948 to handle missing profiles when simplifying CFG. Summary: Set default branch weight to 1:1 if one of the branch has profile missing when simplifying CFG. Reviewers: spatel, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: http://reviews.llvm.org/D20307 llvm-svn: 269995
2016-05-19 06:41:03 +08:00
; CHECK: !1 = !{!"branch_weights", i32 1, i32 3}
; CHECK: !2 = !{!"branch_weights", i32 1, i32 5}
; CHECK: !3 = !{!"branch_weights", i32 7, i32 1, i32 2}
; CHECK: !4 = !{!"branch_weights", i32 49, i32 12, i32 24, i32 35}
; CHECK: !5 = !{!"branch_weights", i32 11, i32 5}
; CHECK: !6 = !{!"branch_weights", i32 17, i32 15}
; CHECK: !7 = !{!"branch_weights", i32 9, i32 7}
; CHECK: !8 = !{!"branch_weights", i32 17, i32 9, i32 8, i32 7, i32 17}
; CHECK: !9 = !{!"branch_weights", i32 24, i32 33}
; CHECK: !10 = !{!"branch_weights", i32 8, i32 33}
PGO branch weight: keep halving the weights until they can fit into uint32. When folding branches to common destination, the updated branch weights can exceed uint32 by more than factor of 2. We should keep halving the weights until they can fit into uint32. llvm-svn: 200262
2014-01-28 07:39:03 +08:00
;; The false weight prints out as a negative integer here, but inside llvm, we
;; treat the weight as an unsigned integer.
Follow-up patch of http://reviews.llvm.org/D19948 to handle missing profiles when simplifying CFG. Summary: Set default branch weight to 1:1 if one of the branch has profile missing when simplifying CFG. Reviewers: spatel, davidxl Subscribers: danielcdh, llvm-commits Differential Revision: http://reviews.llvm.org/D20307 llvm-svn: 269995
2016-05-19 06:41:03 +08:00
; CHECK: !11 = !{!"branch_weights", i32 112017436, i32 -735157296}
; CHECK: !12 = !{!"branch_weights", i32 3, i32 5}
; CHECK: !13 = !{!"branch_weights", i32 22, i32 12}
; CHECK: !14 = !{!"branch_weights", i32 34, i32 21}
; CHECK: !15 = !{!"branch_weights", i32 33, i32 14}
; CHECK: !16 = !{!"branch_weights", i32 47, i32 8}
; CHECK: !17 = !{!"branch_weights", i32 6, i32 2}
; CHECK: !18 = !{!"branch_weights", i32 8, i32 2}