[llvm] [InstCombine] Add function attribute `instcombine-no-verify-fixpoint` (PR #113822)
Yingwei Zheng via llvm-commits
llvm-commits at lists.llvm.org
Sun Oct 27 23:44:21 PDT 2024
https://github.com/dtcxzyw updated https://github.com/llvm/llvm-project/pull/113822
>From fa34cf18dd472fc499f819ddf665e0db70cf070e Mon Sep 17 00:00:00 2001
From: Yingwei Zheng <dtcxzyw2333 at gmail.com>
Date: Mon, 28 Oct 2024 00:14:52 +0800
Subject: [PATCH 1/2] [InstCombine] Add function attribute
`instcombine-no-verify-fixpoint`
---
.../Transforms/InstCombine/InstructionCombining.cpp | 12 ++++++++----
.../ValueTracking/numsignbits-from-assume.ll | 2 +-
.../Transforms/InstCombine/2007-10-31-RangeCrash.ll | 7 ++++---
llvm/test/Transforms/InstCombine/cast_phi.ll | 4 ++--
.../InstCombine/constant-fold-iteration.ll | 5 +++--
llvm/test/Transforms/InstCombine/icmp-or.ll | 6 +++---
llvm/test/Transforms/InstCombine/pr55228.ll | 4 ++--
llvm/test/Transforms/InstCombine/shift.ll | 4 ++--
llvm/test/Transforms/InstCombine/sink_instruction.ll | 4 ++--
llvm/test/Transforms/InstCombine/zext-or-icmp.ll | 4 ++--
llvm/test/Transforms/PGOProfile/chr.ll | 4 ++--
.../SimpleLoopUnswitch/2007-08-01-LCSSA.ll | 6 +++---
12 files changed, 34 insertions(+), 28 deletions(-)
diff --git a/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp b/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
index c8b9f166b16020..64288fb060fc82 100644
--- a/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
@@ -5462,6 +5462,8 @@ static bool combineInstructionsOverFunction(
BranchProbabilityInfo *BPI, ProfileSummaryInfo *PSI,
const InstCombineOptions &Opts) {
auto &DL = F.getDataLayout();
+ bool VerifyFixpoint = Opts.VerifyFixpoint &&
+ !F.hasFnAttribute("instcombine-no-verify-fixpoint");
/// Builder - This is an IRBuilder that automatically inserts new
/// instructions into the worklist when they are created.
@@ -5486,7 +5488,7 @@ static bool combineInstructionsOverFunction(
while (true) {
++Iteration;
- if (Iteration > Opts.MaxIterations && !Opts.VerifyFixpoint) {
+ if (Iteration > Opts.MaxIterations && !VerifyFixpoint) {
LLVM_DEBUG(dbgs() << "\n\n[IC] Iteration limit #" << Opts.MaxIterations
<< " on " << F.getName()
<< " reached; stopping without verifying fixpoint\n");
@@ -5508,9 +5510,11 @@ static bool combineInstructionsOverFunction(
MadeIRChange = true;
if (Iteration > Opts.MaxIterations) {
report_fatal_error(
- "Instruction Combining did not reach a fixpoint after " +
- Twine(Opts.MaxIterations) + " iterations. " +
- "Use 'instcombine<no-verify-fixpoint>' to suppress this error.",
+ "Instruction Combining on " + Twine(F.getName()) +
+ " did not reach a fixpoint after " + Twine(Opts.MaxIterations) +
+ " iterations. " +
+ "Use 'instcombine<no-verify-fixpoint>' or function attribute "
+ "'instcombine-no-verify-fixpoint' to suppress this error.",
/*GenCrashDiag=*/false);
}
}
diff --git a/llvm/test/Analysis/ValueTracking/numsignbits-from-assume.ll b/llvm/test/Analysis/ValueTracking/numsignbits-from-assume.ll
index 95ac98532da621..7b0ccb25a2c1a2 100644
--- a/llvm/test/Analysis/ValueTracking/numsignbits-from-assume.ll
+++ b/llvm/test/Analysis/ValueTracking/numsignbits-from-assume.ll
@@ -1,5 +1,5 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -passes='instcombine<no-verify-fixpoint>' -S | FileCheck %s
+; RUN: opt < %s -passes=instcombine -S | FileCheck %s
; FIXME: This does not currently reach a fix point, because an assume can only
; be propagated backwards after its argument has been simplified.
diff --git a/llvm/test/Transforms/InstCombine/2007-10-31-RangeCrash.ll b/llvm/test/Transforms/InstCombine/2007-10-31-RangeCrash.ll
index 8b472aa5af0902..b5ae08e1daa3af 100644
--- a/llvm/test/Transforms/InstCombine/2007-10-31-RangeCrash.ll
+++ b/llvm/test/Transforms/InstCombine/2007-10-31-RangeCrash.ll
@@ -1,13 +1,14 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
-; RUN: opt < %s -S -passes='instcombine<no-verify-fixpoint>' | FileCheck %s
+; RUN: opt < %s -S -passes=instcombine | FileCheck %s
; We do not reach a fixpoint, because we first have to infer nsw on the IV add,
; and could eliminate the icmp slt afterwards, but don't revisit it.
target datalayout = "E-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f128:64:128"
-define i32 @test() {
-; CHECK-LABEL: define i32 @test() {
+define i32 @test() "instcombine-no-verify-fixpoint" {
+; CHECK-LABEL: define i32 @test(
+; CHECK-SAME: ) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 true, label [[BB_I:%.*]], label [[CALCULATECOLORSPECIFICBLACKLEVEL_EXIT:%.*]]
; CHECK: bb.i:
diff --git a/llvm/test/Transforms/InstCombine/cast_phi.ll b/llvm/test/Transforms/InstCombine/cast_phi.ll
index 2819b7d05f7b30..6b05edc31deb87 100644
--- a/llvm/test/Transforms/InstCombine/cast_phi.ll
+++ b/llvm/test/Transforms/InstCombine/cast_phi.ll
@@ -1,5 +1,5 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -passes="instcombine<no-verify-fixpoint>" -S | FileCheck %s
+; RUN: opt < %s -passes=instcombine -S | FileCheck %s
target datalayout = "n32:64"
@@ -309,7 +309,7 @@ exit:
ret i64 %r
}
-define i8 @trunc_in_loop_exit_block() {
+define i8 @trunc_in_loop_exit_block() "instcombine-no-verify-fixpoint" {
; CHECK-LABEL: @trunc_in_loop_exit_block(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
diff --git a/llvm/test/Transforms/InstCombine/constant-fold-iteration.ll b/llvm/test/Transforms/InstCombine/constant-fold-iteration.ll
index 7f800f614c47d7..ed4fcc6ecaac72 100644
--- a/llvm/test/Transforms/InstCombine/constant-fold-iteration.ll
+++ b/llvm/test/Transforms/InstCombine/constant-fold-iteration.ll
@@ -1,11 +1,12 @@
-; RUN: opt < %s -passes='instcombine<no-verify-fixpoint>' -S -debug 2>&1 | FileCheck %s
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
+; RUN: opt < %s -passes=instcombine -S -debug 2>&1 | FileCheck %s
; REQUIRES: asserts
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32"
; This test disables fixpoint verification, because that would cause a second
; iteration for verification.
-define i32 @a() nounwind readnone {
+define i32 @a() nounwind readnone "instcombine-no-verify-fixpoint" {
entry:
%cmp = icmp eq i32 0, ptrtoint (ptr @a to i32)
%ext = zext i1 %cmp to i32
diff --git a/llvm/test/Transforms/InstCombine/icmp-or.ll b/llvm/test/Transforms/InstCombine/icmp-or.ll
index 36b3216196f846..56115f6d7d3414 100644
--- a/llvm/test/Transforms/InstCombine/icmp-or.ll
+++ b/llvm/test/Transforms/InstCombine/icmp-or.ll
@@ -1,5 +1,5 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -passes='instcombine<no-verify-fixpoint>' -S | FileCheck %s
+; RUN: opt < %s -passes=instcombine -S | FileCheck %s
declare void @use(i8)
@@ -432,7 +432,7 @@ define i1 @icmp_or_xor_2_ne_fail(i64 %x1, i64 %y1, i64 %x2, i64 %y2) {
; simplify `%cmp_1 = icmp eq i64 %xor, 0`, `%xor = xor i64 %x1, %y1`
; has one use which allows for complete simplification (rooted on
; `%or1 = or i1 %cmp, %cmp_1` so we don't end up adding it back).
-define i1 @icmp_or_xor_2_3_fail(i64 %x1, i64 %y1, i64 %x2, i64 %y2) {
+define i1 @icmp_or_xor_2_3_fail(i64 %x1, i64 %y1, i64 %x2, i64 %y2) "instcombine-no-verify-fixpoint" {
; CHECK-LABEL: @icmp_or_xor_2_3_fail(
; CHECK-NEXT: [[XOR:%.*]] = xor i64 [[X1:%.*]], [[Y1:%.*]]
; CHECK-NEXT: [[XOR1:%.*]] = xor i64 [[X2:%.*]], [[Y2:%.*]]
@@ -453,7 +453,7 @@ define i1 @icmp_or_xor_2_3_fail(i64 %x1, i64 %y1, i64 %x2, i64 %y2) {
; negative test - xor multiuse
-define i1 @icmp_or_xor_2_4_fail(i64 %x1, i64 %y1, i64 %x2, i64 %y2) {
+define i1 @icmp_or_xor_2_4_fail(i64 %x1, i64 %y1, i64 %x2, i64 %y2) "instcombine-no-verify-fixpoint" {
; CHECK-LABEL: @icmp_or_xor_2_4_fail(
; CHECK-NEXT: [[XOR:%.*]] = xor i64 [[X1:%.*]], [[Y1:%.*]]
; CHECK-NEXT: [[XOR1:%.*]] = xor i64 [[X2:%.*]], [[Y2:%.*]]
diff --git a/llvm/test/Transforms/InstCombine/pr55228.ll b/llvm/test/Transforms/InstCombine/pr55228.ll
index 5e34c074346e3c..c959bf16bcb5d5 100644
--- a/llvm/test/Transforms/InstCombine/pr55228.ll
+++ b/llvm/test/Transforms/InstCombine/pr55228.ll
@@ -1,5 +1,5 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt -S -passes='instcombine<no-verify-fixpoint>' < %s | FileCheck %s
+; RUN: opt -S -passes=instcombine < %s | FileCheck %s
; This does not reach a fixpoint, because the global initializer is not in
; folded form. This will not happen if preceded by a GlobalOpt run.
@@ -9,7 +9,7 @@ target datalayout = "p:8:8"
@g = external global i8
@c = constant ptr getelementptr inbounds (i8, ptr @g, i64 1)
-define i1 @test(ptr %p) {
+define i1 @test(ptr %p) "instcombine-no-verify-fixpoint" {
; CHECK-LABEL: @test(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq ptr [[P:%.*]], getelementptr inbounds (i8, ptr @g, i64 1)
; CHECK-NEXT: ret i1 [[CMP]]
diff --git a/llvm/test/Transforms/InstCombine/shift.ll b/llvm/test/Transforms/InstCombine/shift.ll
index 558f4ffbfcabe4..3029a475e27b1d 100644
--- a/llvm/test/Transforms/InstCombine/shift.ll
+++ b/llvm/test/Transforms/InstCombine/shift.ll
@@ -1,5 +1,5 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -passes='instcombine<no-verify-fixpoint>' -S | FileCheck %s
+; RUN: opt < %s -passes=instcombine -S | FileCheck %s
; The fuzzer-generated @ashr_out_of_range test case does not reach a fixpoint,
; because a logical and it not relaxed to a bitwise and in one iteration.
@@ -1737,7 +1737,7 @@ define i177 @lshr_out_of_range2(i177 %Y, ptr %A2, ptr %ptr) {
; OSS Fuzz #5032
; https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=5032
-define void @ashr_out_of_range(ptr %A) {
+define void @ashr_out_of_range(ptr %A) "instcombine-no-verify-fixpoint" {
; CHECK-LABEL: @ashr_out_of_range(
; CHECK-NEXT: [[L:%.*]] = load i177, ptr [[A:%.*]], align 4
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i177 [[L]], -1
diff --git a/llvm/test/Transforms/InstCombine/sink_instruction.ll b/llvm/test/Transforms/InstCombine/sink_instruction.ll
index dac40852c4bdcb..fba1dbcaae1632 100644
--- a/llvm/test/Transforms/InstCombine/sink_instruction.ll
+++ b/llvm/test/Transforms/InstCombine/sink_instruction.ll
@@ -1,5 +1,5 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt -passes='instcombine<no-verify-fixpoint>' -S < %s | FileCheck %s
+; RUN: opt -passes=instcombine -S < %s | FileCheck %s
; We fail to reach a fixpoint, because sunk instructions get revisited too
; early. In @test2 the sunk add is revisited before the dominating condition
@@ -33,7 +33,7 @@ endif: ; preds = %entry
;; PHI use, sink divide before call.
-define i32 @test2(i32 %x) nounwind ssp {
+define i32 @test2(i32 %x) nounwind ssp "instcombine-no-verify-fixpoint" {
; CHECK-LABEL: @test2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[BB:%.*]]
diff --git a/llvm/test/Transforms/InstCombine/zext-or-icmp.ll b/llvm/test/Transforms/InstCombine/zext-or-icmp.ll
index acf547b55722fc..feb4be9e370505 100644
--- a/llvm/test/Transforms/InstCombine/zext-or-icmp.ll
+++ b/llvm/test/Transforms/InstCombine/zext-or-icmp.ll
@@ -1,5 +1,5 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -passes='instcombine<no-verify-fixpoint>' -S | FileCheck %s
+; RUN: opt < %s -passes=instcombine -S | FileCheck %s
define i8 @zext_or_icmp_icmp(i8 %a, i8 %b) {
; CHECK-LABEL: @zext_or_icmp_icmp(
@@ -168,7 +168,7 @@ define i32 @PR49475(i32 %x, i16 %y) {
; This would infinite-loop.
-define i8 @PR49475_infloop(i32 %t0, i16 %insert, i64 %e, i8 %i162) {
+define i8 @PR49475_infloop(i32 %t0, i16 %insert, i64 %e, i8 %i162) "instcombine-no-verify-fixpoint" {
; CHECK-LABEL: @PR49475_infloop(
; CHECK-NEXT: [[B2:%.*]] = icmp eq i16 [[INSERT:%.*]], 0
; CHECK-NEXT: [[TMP1:%.*]] = and i32 [[T0:%.*]], 1
diff --git a/llvm/test/Transforms/PGOProfile/chr.ll b/llvm/test/Transforms/PGOProfile/chr.ll
index 34e39fe37979ac..658f915d435677 100644
--- a/llvm/test/Transforms/PGOProfile/chr.ll
+++ b/llvm/test/Transforms/PGOProfile/chr.ll
@@ -1,5 +1,5 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -passes='require<profile-summary>,function(chr,instcombine<no-verify-fixpoint>,simplifycfg)' -S | FileCheck %s
+; RUN: opt < %s -passes='require<profile-summary>,function(chr,instcombine,simplifycfg)' -S | FileCheck %s
; FIXME: This does not currently reach a fix point, because we don't make use
; of a freeze that is pushed up the instruction chain later.
@@ -1928,7 +1928,7 @@ bb4:
; foo();
; }
; return 45;
-define i32 @test_chr_21(i64 %i, i64 %k, i64 %j) !prof !14 {
+define i32 @test_chr_21(i64 %i, i64 %k, i64 %j) "instcombine-no-verify-fixpoint" !prof !14 {
; CHECK-LABEL: @test_chr_21(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[I_FR:%.*]] = freeze i64 [[I:%.*]]
diff --git a/llvm/test/Transforms/SimpleLoopUnswitch/2007-08-01-LCSSA.ll b/llvm/test/Transforms/SimpleLoopUnswitch/2007-08-01-LCSSA.ll
index 9e4b33d4c4d5e5..fb342322b2da7a 100644
--- a/llvm/test/Transforms/SimpleLoopUnswitch/2007-08-01-LCSSA.ll
+++ b/llvm/test/Transforms/SimpleLoopUnswitch/2007-08-01-LCSSA.ll
@@ -1,5 +1,5 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
-; RUN: opt < %s -S -passes='loop(simple-loop-unswitch),instcombine<no-verify-fixpoint>' -verify-memoryssa | FileCheck %s
+; RUN: opt < %s -S -passes='loop(simple-loop-unswitch),instcombine' -verify-memoryssa | FileCheck %s
; We do not reach a fixpoint, because we first have to infer nsw on the IV add,
; and could eliminate the icmp slt afterwards, but don't revisit it.
@@ -8,9 +8,9 @@
declare i32 @strcmp(ptr, ptr)
-define i32 @_ZN9Generator6strregEPKc(ptr %this, ptr %s) {
+define i32 @_ZN9Generator6strregEPKc(ptr %this, ptr %s) "instcombine-no-verify-fixpoint" {
; CHECK-LABEL: define i32 @_ZN9Generator6strregEPKc(
-; CHECK-SAME: ptr [[THIS:%.*]], ptr [[S:%.*]]) {
+; CHECK-SAME: ptr [[THIS:%.*]], ptr [[S:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP122:%.*]] = icmp eq ptr [[S]], null
; CHECK-NEXT: br label [[BB184:%.*]]
>From a3810ab3cda4d9163dc136e510a0c391bf727434 Mon Sep 17 00:00:00 2001
From: Yingwei Zheng <dtcxzyw2333 at gmail.com>
Date: Mon, 28 Oct 2024 14:43:40 +0800
Subject: [PATCH 2/2] [InstCombine] Fix comments. NFC.
---
.../test/Analysis/ValueTracking/numsignbits-from-assume.ll | 3 ---
llvm/test/Transforms/InstCombine/shift.ll | 6 +++---
llvm/test/Transforms/InstCombine/sink_instruction.ll | 7 +++----
llvm/test/Transforms/PGOProfile/chr.ll | 6 +++---
4 files changed, 9 insertions(+), 13 deletions(-)
diff --git a/llvm/test/Analysis/ValueTracking/numsignbits-from-assume.ll b/llvm/test/Analysis/ValueTracking/numsignbits-from-assume.ll
index 7b0ccb25a2c1a2..5beb0c7cadfbaa 100644
--- a/llvm/test/Analysis/ValueTracking/numsignbits-from-assume.ll
+++ b/llvm/test/Analysis/ValueTracking/numsignbits-from-assume.ll
@@ -1,9 +1,6 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
-; FIXME: This does not currently reach a fix point, because an assume can only
-; be propagated backwards after its argument has been simplified.
-
define i32 @computeNumSignBits_add1(i32 %in) {
; CHECK-LABEL: @computeNumSignBits_add1(
; CHECK-NEXT: [[ADD:%.*]] = add i32 [[IN:%.*]], 1
diff --git a/llvm/test/Transforms/InstCombine/shift.ll b/llvm/test/Transforms/InstCombine/shift.ll
index 3029a475e27b1d..d699d10d4b3a83 100644
--- a/llvm/test/Transforms/InstCombine/shift.ll
+++ b/llvm/test/Transforms/InstCombine/shift.ll
@@ -1,9 +1,6 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes=instcombine -S | FileCheck %s
-; The fuzzer-generated @ashr_out_of_range test case does not reach a fixpoint,
-; because a logical and it not relaxed to a bitwise and in one iteration.
-
declare void @use(i64)
declare void @use_i32(i32)
@@ -1735,6 +1732,9 @@ define i177 @lshr_out_of_range2(i177 %Y, ptr %A2, ptr %ptr) {
ret i177 %B1
}
+; The fuzzer-generated @ashr_out_of_range test case does not reach a fixpoint,
+; because a logical and it not relaxed to a bitwise and in one iteration.
+
; OSS Fuzz #5032
; https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=5032
define void @ashr_out_of_range(ptr %A) "instcombine-no-verify-fixpoint" {
diff --git a/llvm/test/Transforms/InstCombine/sink_instruction.ll b/llvm/test/Transforms/InstCombine/sink_instruction.ll
index fba1dbcaae1632..cb9a3069ca5fd4 100644
--- a/llvm/test/Transforms/InstCombine/sink_instruction.ll
+++ b/llvm/test/Transforms/InstCombine/sink_instruction.ll
@@ -1,10 +1,6 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=instcombine -S < %s | FileCheck %s
-; We fail to reach a fixpoint, because sunk instructions get revisited too
-; early. In @test2 the sunk add is revisited before the dominating condition
-; is visited and added to the DomConditionCache.
-
;; This tests that the instructions in the entry blocks are sunk into each
;; arm of the 'if'.
@@ -31,6 +27,9 @@ endif: ; preds = %entry
ret i32 %tmp.2
}
+; We fail to reach a fixpoint, because sunk instructions get revisited too
+; early. In @test2 the sunk add is revisited before the dominating condition
+; is visited and added to the DomConditionCache.
;; PHI use, sink divide before call.
define i32 @test2(i32 %x) nounwind ssp "instcombine-no-verify-fixpoint" {
diff --git a/llvm/test/Transforms/PGOProfile/chr.ll b/llvm/test/Transforms/PGOProfile/chr.ll
index 658f915d435677..46f9a2bde7a235 100644
--- a/llvm/test/Transforms/PGOProfile/chr.ll
+++ b/llvm/test/Transforms/PGOProfile/chr.ll
@@ -1,9 +1,6 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -passes='require<profile-summary>,function(chr,instcombine,simplifycfg)' -S | FileCheck %s
-; FIXME: This does not currently reach a fix point, because we don't make use
-; of a freeze that is pushed up the instruction chain later.
-
declare void @foo()
declare void @bar()
@@ -1910,6 +1907,9 @@ bb4:
ret i32 %v13
}
+; FIXME: This does not currently reach a fix point, because we don't make use
+; of a freeze that is pushed up the instruction chain later.
+
; Test the case where two scopes share a common instruction to hoist (%cmp.i).
; Two scopes would hoist it to their hoist points, but since the outer scope
; hoists (entry/bb6-9) it first to its hoist point, it'd be wrong (causing bad
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