[llvm] 36096c2 - [NFC][JumpThreading] Remove InsertFreezeWhenUnfoldingSelect pass parameter
Arthur Eubanks via llvm-commits
llvm-commits at lists.llvm.org
Thu May 26 16:13:48 PDT 2022
Author: Arthur Eubanks
Date: 2022-05-26T16:13:34-07:00
New Revision: 36096c2b383ec78030aad47c6b9f479f34d571d7
URL: https://github.com/llvm/llvm-project/commit/36096c2b383ec78030aad47c6b9f479f34d571d7
DIFF: https://github.com/llvm/llvm-project/commit/36096c2b383ec78030aad47c6b9f479f34d571d7.diff
LOG: [NFC][JumpThreading] Remove InsertFreezeWhenUnfoldingSelect pass parameter
All callers pass true.
select-unfold-freeze.ll is now a subset of select.ll so delete it.
Reviewed By: nikic
Differential Revision: https://reviews.llvm.org/D126501
Added:
Modified:
llvm/include/llvm/Transforms/Scalar.h
llvm/include/llvm/Transforms/Scalar/JumpThreading.h
llvm/lib/Passes/PassBuilderPipelines.cpp
llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
llvm/lib/Transforms/Scalar/JumpThreading.cpp
Removed:
llvm/test/Transforms/JumpThreading/select-unfold-freeze.ll
################################################################################
diff --git a/llvm/include/llvm/Transforms/Scalar.h b/llvm/include/llvm/Transforms/Scalar.h
index f903f64f57a58..edd492b0343d2 100644
--- a/llvm/include/llvm/Transforms/Scalar.h
+++ b/llvm/include/llvm/Transforms/Scalar.h
@@ -240,12 +240,10 @@ FunctionPass *createReassociatePass();
//===----------------------------------------------------------------------===//
//
// JumpThreading - Thread control through mult-pred/multi-succ blocks where some
-// preds always go to some succ. If FreezeSelectCond is true, unfold the
-// condition of a select that unfolds to branch. Thresholds other than minus one
+// preds always go to some succ. Thresholds other than minus one
// override the internal BB duplication default threshold.
//
-FunctionPass *createJumpThreadingPass(bool FreezeSelectCond = false,
- int Threshold = -1);
+FunctionPass *createJumpThreadingPass(int Threshold = -1);
//===----------------------------------------------------------------------===//
//
diff --git a/llvm/include/llvm/Transforms/Scalar/JumpThreading.h b/llvm/include/llvm/Transforms/Scalar/JumpThreading.h
index 07db880a6d74b..09d08bf423a6a 100644
--- a/llvm/include/llvm/Transforms/Scalar/JumpThreading.h
+++ b/llvm/include/llvm/Transforms/Scalar/JumpThreading.h
@@ -92,10 +92,9 @@ class JumpThreadingPass : public PassInfoMixin<JumpThreadingPass> {
unsigned BBDupThreshold;
unsigned DefaultBBDupThreshold;
- bool InsertFreezeWhenUnfoldingSelect;
public:
- JumpThreadingPass(bool InsertFreezeWhenUnfoldingSelect = true, int T = -1);
+ JumpThreadingPass(int T = -1);
// Glue for old PM.
bool runImpl(Function &F, TargetLibraryInfo *TLI, TargetTransformInfo *TTI,
diff --git a/llvm/lib/Passes/PassBuilderPipelines.cpp b/llvm/lib/Passes/PassBuilderPipelines.cpp
index 7a2960a669eaf..eef964442ee7d 100644
--- a/llvm/lib/Passes/PassBuilderPipelines.cpp
+++ b/llvm/lib/Passes/PassBuilderPipelines.cpp
@@ -1617,7 +1617,7 @@ PassBuilder::buildLTODefaultPipeline(OptimizationLevel Level,
FPM.addPass(InstCombinePass());
invokePeepholeEPCallbacks(FPM, Level);
- FPM.addPass(JumpThreadingPass(/*InsertFreezeWhenUnfoldingSelect*/ true));
+ FPM.addPass(JumpThreadingPass());
// Do a post inline PGO instrumentation and use pass. This is a context
// sensitive PGO pass.
@@ -1701,7 +1701,7 @@ PassBuilder::buildLTODefaultPipeline(OptimizationLevel Level,
createModuleToPostOrderCGSCCPassAdaptor(OpenMPOptCGSCCPass()));
invokePeepholeEPCallbacks(MainFPM, Level);
- MainFPM.addPass(JumpThreadingPass(/*InsertFreezeWhenUnfoldingSelect*/ true));
+ MainFPM.addPass(JumpThreadingPass());
MPM.addPass(createModuleToFunctionPassAdaptor(std::move(MainFPM),
PTO.EagerlyInvalidateAnalyses));
diff --git a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
index beac7d6ff8e8b..c4e660fe09b57 100644
--- a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
+++ b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
@@ -1011,7 +1011,7 @@ void PassManagerBuilder::addLTOOptimizationPasses(legacy::PassManagerBase &PM) {
// The IPO passes may leave cruft around. Clean up after them.
PM.add(createInstructionCombiningPass());
addExtensionsToPM(EP_Peephole, PM);
- PM.add(createJumpThreadingPass(/*FreezeSelectCond*/ true));
+ PM.add(createJumpThreadingPass());
// Break up allocas
PM.add(createSROAPass());
@@ -1056,7 +1056,7 @@ void PassManagerBuilder::addLTOOptimizationPasses(legacy::PassManagerBase &PM) {
addExtensionsToPM(EP_Peephole, PM);
- PM.add(createJumpThreadingPass(/*FreezeSelectCond*/ true));
+ PM.add(createJumpThreadingPass());
}
void PassManagerBuilder::addLateLTOOptimizationPasses(
diff --git a/llvm/lib/Transforms/Scalar/JumpThreading.cpp b/llvm/lib/Transforms/Scalar/JumpThreading.cpp
index 5b1f703ffef0b..a9e5b811f15d4 100644
--- a/llvm/lib/Transforms/Scalar/JumpThreading.cpp
+++ b/llvm/lib/Transforms/Scalar/JumpThreading.cpp
@@ -104,11 +104,6 @@ static cl::opt<bool> PrintLVIAfterJumpThreading(
cl::desc("Print the LazyValueInfo cache after JumpThreading"), cl::init(false),
cl::Hidden);
-static cl::opt<bool> JumpThreadingFreezeSelectCond(
- "jump-threading-freeze-select-cond",
- cl::desc("Freeze the condition when unfolding select"), cl::init(true),
- cl::Hidden);
-
static cl::opt<bool> ThreadAcrossLoopHeaders(
"jump-threading-across-loop-headers",
cl::desc("Allow JumpThreading to thread across loop headers, for testing"),
@@ -138,8 +133,7 @@ namespace {
public:
static char ID; // Pass identification
- JumpThreading(bool InsertFreezeWhenUnfoldingSelect = true, int T = -1)
- : FunctionPass(ID), Impl(InsertFreezeWhenUnfoldingSelect, T) {
+ JumpThreading(int T = -1) : FunctionPass(ID), Impl(T) {
initializeJumpThreadingPass(*PassRegistry::getPassRegistry());
}
@@ -173,12 +167,11 @@ INITIALIZE_PASS_END(JumpThreading, "jump-threading",
"Jump Threading", false, false)
// Public interface to the Jump Threading pass
-FunctionPass *llvm::createJumpThreadingPass(bool InsertFr, int Threshold) {
- return new JumpThreading(InsertFr, Threshold);
+FunctionPass *llvm::createJumpThreadingPass(int Threshold) {
+ return new JumpThreading(Threshold);
}
-JumpThreadingPass::JumpThreadingPass(bool InsertFr, int T) {
- InsertFreezeWhenUnfoldingSelect = JumpThreadingFreezeSelectCond | InsertFr;
+JumpThreadingPass::JumpThreadingPass(int T) {
DefaultBBDupThreshold = (T == -1) ? BBDuplicateThreshold : unsigned(T);
}
@@ -2911,8 +2904,7 @@ bool JumpThreadingPass::tryToUnfoldSelectInCurrBB(BasicBlock *BB) {
continue;
// Expand the select.
Value *Cond = SI->getCondition();
- if (InsertFreezeWhenUnfoldingSelect &&
- !isGuaranteedNotToBeUndefOrPoison(Cond, nullptr, SI))
+ if (!isGuaranteedNotToBeUndefOrPoison(Cond, nullptr, SI))
Cond = new FreezeInst(Cond, "cond.fr", SI);
Instruction *Term = SplitBlockAndInsertIfThen(Cond, SI, false);
BasicBlock *SplitBB = SI->getParent();
diff --git a/llvm/test/Transforms/JumpThreading/select-unfold-freeze.ll b/llvm/test/Transforms/JumpThreading/select-unfold-freeze.ll
deleted file mode 100644
index 5f6f5ddcd7cfd..0000000000000
--- a/llvm/test/Transforms/JumpThreading/select-unfold-freeze.ll
+++ /dev/null
@@ -1,244 +0,0 @@
-; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt -S -jump-threading-freeze-select-cond -jump-threading < %s | FileCheck %s
-
-declare void @foo()
-declare void @bar()
-declare void @baz()
-declare void @quux()
-
-
-define void @test_switch_cmp(i1 %cond, i32 %val, i8 %value) nounwind {
-; CHECK-LABEL: @test_switch_cmp(
-; CHECK-NEXT: entry:
-; CHECK-NEXT: br i1 [[COND:%.*]], label [[L0:%.*]], label [[L0_THREAD:%.*]]
-; CHECK: L0:
-; CHECK-NEXT: [[VAL_PHI:%.*]] = phi i32 [ [[VAL:%.*]], [[ENTRY:%.*]] ]
-; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[VAL_PHI]], 0
-; CHECK-NEXT: [[COND_FR:%.*]] = freeze i1 [[CMP]]
-; CHECK-NEXT: br i1 [[COND_FR]], label [[L1:%.*]], label [[TMP0:%.*]]
-; CHECK: 0:
-; CHECK-NEXT: [[TMP1:%.*]] = phi i8 [ [[VALUE:%.*]], [[L0]] ]
-; CHECK-NEXT: switch i8 [[TMP1]], label [[L3:%.*]] [
-; CHECK-NEXT: i8 1, label [[L1]]
-; CHECK-NEXT: i8 2, label [[L2:%.*]]
-; CHECK-NEXT: ]
-; CHECK: L1:
-; CHECK-NEXT: call void @foo()
-; CHECK-NEXT: ret void
-; CHECK: L2:
-; CHECK-NEXT: call void @bar()
-; CHECK-NEXT: ret void
-; CHECK: L3:
-; CHECK-NEXT: call void @baz()
-; CHECK-NEXT: ret void
-; CHECK: L0.thread:
-; CHECK-NEXT: call void @quux()
-; CHECK-NEXT: br label [[L1]]
-;
-entry:
- br i1 %cond, label %L0, label %L4
-L0:
- %val.phi = phi i32 [%val, %entry], [-1, %L4]
- %cmp = icmp slt i32 %val.phi, 0
- %expr = select i1 %cmp, i8 1, i8 %value
- switch i8 %expr, label %L3 [i8 1, label %L1 i8 2, label %L2]
-
-L1:
- call void @foo()
- ret void
-L2:
- call void @bar()
- ret void
-L3:
- call void @baz()
- ret void
-L4:
- call void @quux()
- br label %L0
-}
-
-define i32 @unfold3(i32 %u, i32 %v, i32 %w, i32 %x, i32 %y, i32 %z, i32 %j) nounwind {
-; CHECK-LABEL: @unfold3(
-; CHECK-NEXT: entry:
-; CHECK-NEXT: [[ADD3:%.*]] = add nsw i32 [[J:%.*]], 2
-; CHECK-NEXT: [[CMP_I:%.*]] = icmp slt i32 [[U:%.*]], [[V:%.*]]
-; CHECK-NEXT: br i1 [[CMP_I]], label [[DOTEXIT_THREAD4:%.*]], label [[COND_FALSE_I:%.*]]
-; CHECK: cond.false.i:
-; CHECK-NEXT: [[CMP4_I:%.*]] = icmp sgt i32 [[U]], [[V]]
-; CHECK-NEXT: br i1 [[CMP4_I]], label [[DOTEXIT_THREAD:%.*]], label [[COND_FALSE_6_I:%.*]]
-; CHECK: cond.false.6.i:
-; CHECK-NEXT: [[CMP8_I:%.*]] = icmp slt i32 [[W:%.*]], [[X:%.*]]
-; CHECK-NEXT: br i1 [[CMP8_I]], label [[DOTEXIT_THREAD4]], label [[COND_FALSE_10_I:%.*]]
-; CHECK: cond.false.10.i:
-; CHECK-NEXT: [[CMP13_I:%.*]] = icmp sgt i32 [[W]], [[X]]
-; CHECK-NEXT: br i1 [[CMP13_I]], label [[DOTEXIT_THREAD]], label [[DOTEXIT:%.*]]
-; CHECK: .exit:
-; CHECK-NEXT: [[PHITMP:%.*]] = icmp sge i32 [[Y:%.*]], [[Z:%.*]]
-; CHECK-NEXT: [[COND_FR:%.*]] = freeze i1 [[PHITMP]]
-; CHECK-NEXT: br i1 [[COND_FR]], label [[DOTEXIT_THREAD]], label [[DOTEXIT_THREAD4]]
-; CHECK: .exit.thread:
-; CHECK-NEXT: br label [[DOTEXIT_THREAD4]]
-; CHECK: .exit.thread4:
-; CHECK-NEXT: [[TMP0:%.*]] = phi i32 [ [[J]], [[DOTEXIT_THREAD]] ], [ [[ADD3]], [[DOTEXIT]] ], [ [[ADD3]], [[ENTRY:%.*]] ], [ [[ADD3]], [[COND_FALSE_6_I]] ]
-; CHECK-NEXT: ret i32 [[TMP0]]
-;
-entry:
- %add3 = add nsw i32 %j, 2
- %cmp.i = icmp slt i32 %u, %v
- br i1 %cmp.i, label %.exit, label %cond.false.i
-
-cond.false.i: ; preds = %entry
- %cmp4.i = icmp sgt i32 %u, %v
- br i1 %cmp4.i, label %.exit, label %cond.false.6.i
-
-cond.false.6.i: ; preds = %cond.false.i
- %cmp8.i = icmp slt i32 %w, %x
- br i1 %cmp8.i, label %.exit, label %cond.false.10.i
-
-cond.false.10.i: ; preds = %cond.false.6.i
- %cmp13.i = icmp sgt i32 %w, %x
- br i1 %cmp13.i, label %.exit, label %cond.false.15.i
-
-cond.false.15.i: ; preds = %cond.false.10.i
- %phitmp = icmp sge i32 %y, %z
- br label %.exit
-
-.exit: ; preds = %entry, %cond.false.i, %cond.false.6.i, %cond.false.10.i, %cond.false.15.i
- %cond23.i = phi i1 [ false, %entry ], [ true, %cond.false.i ], [ false, %cond.false.6.i ], [ %phitmp, %cond.false.15.i ], [ true, %cond.false.10.i ]
- %j.add3 = select i1 %cond23.i, i32 %j, i32 %add3
- ret i32 %j.add3
-}
-
-define i32 @unfold4(i32 %u, i32 %v, i32 %w, i32 %x, i32 %y, i32 %z, i32 %j) nounwind {
-; CHECK-LABEL: @unfold4(
-; CHECK-NEXT: entry:
-; CHECK-NEXT: [[ADD3:%.*]] = add nsw i32 [[J:%.*]], 2
-; CHECK-NEXT: [[CMP_I:%.*]] = icmp slt i32 [[U:%.*]], [[V:%.*]]
-; CHECK-NEXT: br i1 [[CMP_I]], label [[DOTEXIT_THREAD:%.*]], label [[COND_FALSE_I:%.*]]
-; CHECK: cond.false.i:
-; CHECK-NEXT: [[CMP4_I:%.*]] = icmp sgt i32 [[U]], [[V]]
-; CHECK-NEXT: br i1 [[CMP4_I]], label [[DOTEXIT_THREAD5:%.*]], label [[COND_FALSE_6_I:%.*]]
-; CHECK: cond.false.6.i:
-; CHECK-NEXT: [[CMP8_I:%.*]] = icmp slt i32 [[W:%.*]], [[X:%.*]]
-; CHECK-NEXT: br i1 [[CMP8_I]], label [[DOTEXIT_THREAD]], label [[COND_FALSE_10_I:%.*]]
-; CHECK: cond.false.10.i:
-; CHECK-NEXT: [[CMP13_I:%.*]] = icmp sgt i32 [[W]], [[X]]
-; CHECK-NEXT: br i1 [[CMP13_I]], label [[DOTEXIT_THREAD5]], label [[DOTEXIT:%.*]]
-; CHECK: .exit:
-; CHECK-NEXT: [[CMP19_I:%.*]] = icmp sge i32 [[Y:%.*]], [[Z:%.*]]
-; CHECK-NEXT: [[CONV:%.*]] = zext i1 [[CMP19_I]] to i32
-; CHECK-NEXT: [[LNOT_I18:%.*]] = icmp eq i32 [[CONV]], 1
-; CHECK-NEXT: [[COND_FR:%.*]] = freeze i1 [[LNOT_I18]]
-; CHECK-NEXT: br i1 [[COND_FR]], label [[DOTEXIT_THREAD]], label [[DOTEXIT_THREAD5]]
-; CHECK: .exit.thread:
-; CHECK-NEXT: br label [[DOTEXIT_THREAD5]]
-; CHECK: .exit.thread5:
-; CHECK-NEXT: [[TMP0:%.*]] = phi i32 [ [[J]], [[DOTEXIT_THREAD]] ], [ [[ADD3]], [[DOTEXIT]] ], [ [[ADD3]], [[COND_FALSE_I]] ], [ [[ADD3]], [[COND_FALSE_10_I]] ]
-; CHECK-NEXT: ret i32 [[TMP0]]
-;
-entry:
- %add3 = add nsw i32 %j, 2
- %cmp.i = icmp slt i32 %u, %v
- br i1 %cmp.i, label %.exit, label %cond.false.i
-
-cond.false.i: ; preds = %entry
- %cmp4.i = icmp sgt i32 %u, %v
- br i1 %cmp4.i, label %.exit, label %cond.false.6.i
-
-cond.false.6.i: ; preds = %cond.false.i
- %cmp8.i = icmp slt i32 %w, %x
- br i1 %cmp8.i, label %.exit, label %cond.false.10.i
-
-cond.false.10.i: ; preds = %cond.false.6.i
- %cmp13.i = icmp sgt i32 %w, %x
- br i1 %cmp13.i, label %.exit, label %cond.false.15.i
-
-cond.false.15.i: ; preds = %cond.false.10.i
- %cmp19.i = icmp sge i32 %y, %z
- %conv = zext i1 %cmp19.i to i32
- br label %.exit
-
-.exit: ; preds = %entry, %cond.false.i, %cond.false.6.i, %cond.false.10.i, %cond.false.15.i
- %cond23.i = phi i32 [ 1, %entry ], [ 0, %cond.false.i ], [ 1, %cond.false.6.i ], [ %conv, %cond.false.15.i ], [ 0, %cond.false.10.i ]
- %lnot.i18 = icmp eq i32 %cond23.i, 1
- %j.add3 = select i1 %lnot.i18, i32 %j, i32 %add3
- ret i32 %j.add3
-}
-
-; TODO: cond23_i should be constant-folded.
-define i32 @unfold5(i32 %u, i32 %v, i32 %w, i32 %x, i32 %y, i32 %z, i32 %j) nounwind {
-; CHECK-LABEL: @unfold5(
-; CHECK-NEXT: entry:
-; CHECK-NEXT: [[ADD3:%.*]] = add nsw i32 [[J:%.*]], 2
-; CHECK-NEXT: [[CMP_I:%.*]] = icmp slt i32 [[U:%.*]], [[V:%.*]]
-; CHECK-NEXT: br i1 [[CMP_I]], label [[DOTEXIT:%.*]], label [[COND_FALSE_I:%.*]]
-; CHECK: cond.false.i:
-; CHECK-NEXT: [[CMP4_I:%.*]] = icmp sgt i32 [[U]], [[V]]
-; CHECK-NEXT: br i1 [[CMP4_I]], label [[DOTEXIT]], label [[COND_FALSE_6_I:%.*]]
-; CHECK: cond.false.6.i:
-; CHECK-NEXT: [[CMP8_I:%.*]] = icmp slt i32 [[W:%.*]], [[X:%.*]]
-; CHECK-NEXT: br i1 [[CMP8_I]], label [[DOTEXIT]], label [[COND_FALSE_10_I:%.*]]
-; CHECK: cond.false.10.i:
-; CHECK-NEXT: [[CMP13_I:%.*]] = icmp sgt i32 [[W]], [[X]]
-; CHECK-NEXT: br i1 [[CMP13_I]], label [[DOTEXIT]], label [[COND_FALSE_15_I:%.*]]
-; CHECK: cond.false.15.i:
-; CHECK-NEXT: [[CMP19_I:%.*]] = icmp sge i32 [[Y:%.*]], [[Z:%.*]]
-; CHECK-NEXT: [[CONV:%.*]] = zext i1 [[CMP19_I]] to i32
-; CHECK-NEXT: br label [[DOTEXIT]]
-; CHECK: .exit:
-; CHECK-NEXT: [[TMP0:%.*]] = phi i32 [ [[J]], [[COND_FALSE_10_I]] ], [ [[CONV]], [[COND_FALSE_15_I]] ], [ 1, [[COND_FALSE_6_I]] ], [ 3, [[COND_FALSE_I]] ], [ 2, [[ENTRY:%.*]] ]
-; CHECK-NEXT: ret i32 [[TMP0]]
-;
-entry:
- %add3 = add nsw i32 %j, 2
- %cmp.i = icmp slt i32 %u, %v
- br i1 %cmp.i, label %.exit, label %cond.false.i
-
-cond.false.i: ; preds = %entry
- %cmp4.i = icmp sgt i32 %u, %v
- br i1 %cmp4.i, label %.exit, label %cond.false.6.i
-
-cond.false.6.i: ; preds = %cond.false.i
- %cmp8.i = icmp slt i32 %w, %x
- br i1 %cmp8.i, label %.exit, label %cond.false.10.i
-
-cond.false.10.i: ; preds = %cond.false.6.i
- %cmp13.i = icmp sgt i32 %w, %x
- br i1 %cmp13.i, label %.exit, label %cond.false.15.i
-
-cond.false.15.i: ; preds = %cond.false.10.i
- %cmp19.i = icmp sge i32 %y, %z
- %conv = zext i1 %cmp19.i to i32
- br label %.exit
-
-.exit: ; preds = %entry, %cond.false.i, %cond.false.6.i, %cond.false.10.i, %cond.false.15.i
- %cond23.i = phi i32 [ 2, %entry ], [ 3, %cond.false.i ], [ 1, %cond.false.6.i ], [ %conv, %cond.false.15.i ], [ 7, %cond.false.10.i ]
- %lnot.i18 = icmp sgt i32 %cond23.i, 5
- %j.add3 = select i1 %lnot.i18, i32 %j, i32 %cond23.i
- ret i32 %j.add3
-}
-
-define i32 @TryToUnfoldSelectInCurrBB(i1 %b, i1 %ui, i32 %s, i1 %x) {
-; CHECK-LABEL: @TryToUnfoldSelectInCurrBB(
-; CHECK-NEXT: entry:
-; CHECK-NEXT: br i1 [[B:%.*]], label [[IF_END_THREAD:%.*]], label [[IF_END:%.*]]
-; CHECK: if.end:
-; CHECK-NEXT: [[COND_FR:%.*]] = freeze i1 [[X:%.*]]
-; CHECK-NEXT: br i1 [[COND_FR]], label [[TMP0:%.*]], label [[IF_END_THREAD]]
-; CHECK: 0:
-; CHECK-NEXT: br label [[IF_END_THREAD]]
-; CHECK: if.end.thread:
-; CHECK-NEXT: [[TMP1:%.*]] = phi i32 [ [[S:%.*]], [[TMP0]] ], [ 42, [[IF_END]] ], [ 42, [[ENTRY:%.*]] ]
-; CHECK-NEXT: ret i32 [[TMP1]]
-;
-entry:
- br i1 %b, label %if.end, label %if.else
-
-if.else:
- br label %if.end
-
-if.end:
- %v = phi i1 [ %x, %if.else ], [ false, %entry ]
- %v1 = select i1 %v, i32 %s, i32 42
- ret i32 %v1
-}
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