external add_lower_expect_intrinsic
: [< Llvm.PassManager.any ] Llvm.PassManager.t -> unit
= "llvm_add_lower_expect_intrinsic"
+external add_lower_constant_intrinsics
+ : [< Llvm.PassManager.any ] Llvm.PassManager.t -> unit
+ = "llvm_add_lower_constant_intrinsics"
external add_type_based_alias_analysis
: [< Llvm.PassManager.any ] Llvm.PassManager.t -> unit
= "llvm_add_type_based_alias_analysis"
: [< Llvm.PassManager.any ] Llvm.PassManager.t -> unit
= "llvm_add_lower_expect_intrinsic"
+(** See the [llvm::createLowerConstantIntrinsicsPass] function. *)
+external add_lower_constant_intrinsics
+ : [< Llvm.PassManager.any ] Llvm.PassManager.t -> unit
+ = "llvm_add_lower_constant_intrinsics"
+
(** See the [llvm::createTypeBasedAliasAnalysisPass] function. *)
external add_type_based_alias_analysis
: [< Llvm.PassManager.any ] Llvm.PassManager.t -> unit
return Val_unit;
}
+/* [<Llvm.PassManager.any] Llvm.PassManager.t -> unit */
+CAMLprim value llvm_add_lower_constant_intrinsics(LLVMPassManagerRef PM) {
+ LLVMAddLowerConstantIntrinsicsPass(PM);
+ return Val_unit;
+}
+
/* [<Llvm.PassManager.any] Llvm.PassManager.t -> unit */
CAMLprim value llvm_add_type_based_alias_analysis(LLVMPassManagerRef PM) {
LLVMAddTypeBasedAliasAnalysisPass(PM);
/** See llvm::createLowerExpectIntrinsicPass function */
void LLVMAddLowerExpectIntrinsicPass(LLVMPassManagerRef PM);
+/** See llvm::createLowerConstantIntrinsicsPass function */
+void LLVMAddLowerConstantIntrinsicsPass(LLVMPassManagerRef PM);
+
/** See llvm::createTypeBasedAliasAnalysisPass function */
void LLVMAddTypeBasedAliasAnalysisPass(LLVMPassManagerRef PM);
void initializeLoopVersioningLICMPass(PassRegistry&);
void initializeLoopVersioningPassPass(PassRegistry&);
void initializeLowerAtomicLegacyPassPass(PassRegistry&);
+void initializeLowerConstantIntrinsicsPass(PassRegistry&);
void initializeLowerEmuTLSPass(PassRegistry&);
void initializeLowerExpectIntrinsicPass(PassRegistry&);
void initializeLowerGuardIntrinsicLegacyPassPass(PassRegistry&);
(void) llvm::createLoopVersioningLICMPass();
(void) llvm::createLoopIdiomPass();
(void) llvm::createLoopRotatePass();
+ (void) llvm::createLowerConstantIntrinsicsPass();
(void) llvm::createLowerExpectIntrinsicPass();
(void) llvm::createLowerInvokePass();
(void) llvm::createLowerSwitchPass();
// "block_weights" metadata.
FunctionPass *createLowerExpectIntrinsicPass();
+//===----------------------------------------------------------------------===//
+//
+// LowerConstantIntrinsicss - Expand any remaining llvm.objectsize and
+// llvm.is.constant intrinsic calls, even for the unknown cases.
+//
+FunctionPass *createLowerConstantIntrinsicsPass();
+
//===----------------------------------------------------------------------===//
//
// PartiallyInlineLibCalls - Tries to inline the fast path of library
--- /dev/null
+//===- LowerConstantIntrinsics.h - Lower constant int. pass -*- C++ -*-========//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+/// \file
+///
+/// The header file for the LowerConstantIntrinsics pass as used by the new pass
+/// manager.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TRANSFORMS_SCALAR_LOWERCONSTANTINTRINSICS_H
+#define LLVM_TRANSFORMS_SCALAR_LOWERCONSTANTINTRINSICS_H
+
+#include "llvm/IR/Function.h"
+#include "llvm/IR/PassManager.h"
+
+namespace llvm {
+
+struct LowerConstantIntrinsicsPass :
+ PassInfoMixin<LowerConstantIntrinsicsPass> {
+public:
+ explicit LowerConstantIntrinsicsPass() {}
+
+ /// Run the pass over the function.
+ ///
+ /// This will lower all remaining 'objectsize' and 'is.constant'`
+ /// intrinsic calls in this function, even when the argument has no known
+ /// size or is not a constant respectively. The resulting constant is
+ /// propagated and conditional branches are resolved where possible.
+ /// This complements the Instruction Simplification and
+ /// Instruction Combination passes of the optimized pass chain.
+ PreservedAnalyses run(Function &F, FunctionAnalysisManager &);
+};
+
+}
+
+#endif
});
return true;
}
- case Intrinsic::objectsize: {
- // Lower all uses of llvm.objectsize.*
- Value *RetVal =
- lowerObjectSizeCall(II, *DL, TLInfo, /*MustSucceed=*/true);
-
- resetIteratorIfInvalidatedWhileCalling(BB, [&]() {
- replaceAndRecursivelySimplify(CI, RetVal, TLInfo, nullptr);
- });
- return true;
- }
- case Intrinsic::is_constant: {
- // If is_constant hasn't folded away yet, lower it to false now.
- Constant *RetVal = ConstantInt::get(II->getType(), 0);
- resetIteratorIfInvalidatedWhileCalling(BB, [&]() {
- replaceAndRecursivelySimplify(CI, RetVal, TLInfo, nullptr);
- });
- return true;
- }
+ case Intrinsic::objectsize:
+ llvm_unreachable("llvm.objectsize.* should have been lowered already");
+ case Intrinsic::is_constant:
+ llvm_unreachable("llvm.is.constant.* should have been lowered already");
case Intrinsic::aarch64_stlxr:
case Intrinsic::aarch64_stxr: {
ZExtInst *ExtVal = dyn_cast<ZExtInst>(CI->getArgOperand(0));
MIRBuilder.buildConstant(Reg, TypeID);
return true;
}
- case Intrinsic::objectsize: {
- // If we don't know by now, we're never going to know.
- const ConstantInt *Min = cast<ConstantInt>(CI.getArgOperand(1));
+ case Intrinsic::objectsize:
+ llvm_unreachable("llvm.objectsize.* should have been lowered already");
- MIRBuilder.buildConstant(getOrCreateVReg(CI), Min->isZero() ? -1ULL : 0);
- return true;
- }
case Intrinsic::is_constant:
- // If this wasn't constant-folded away by now, then it's not a
- // constant.
- MIRBuilder.buildConstant(getOrCreateVReg(CI), 0);
- return true;
+ llvm_unreachable("llvm.is.constant.* should have been lowered already");
+
case Intrinsic::stackguard:
getStackGuard(getOrCreateVReg(CI), MIRBuilder);
return true;
TII.get(TargetOpcode::DBG_LABEL)).addMetadata(DI->getLabel());
return true;
}
- case Intrinsic::objectsize: {
- ConstantInt *CI = cast<ConstantInt>(II->getArgOperand(1));
- unsigned long long Res = CI->isZero() ? -1ULL : 0;
- Constant *ResCI = ConstantInt::get(II->getType(), Res);
- unsigned ResultReg = getRegForValue(ResCI);
- if (!ResultReg)
- return false;
- updateValueMap(II, ResultReg);
- return true;
- }
- case Intrinsic::is_constant: {
- Constant *ResCI = ConstantInt::get(II->getType(), 0);
- unsigned ResultReg = getRegForValue(ResCI);
- if (!ResultReg)
- return false;
- updateValueMap(II, ResultReg);
- return true;
- }
+ case Intrinsic::objectsize:
+ llvm_unreachable("llvm.objectsize.* should have been lowered already");
+
+ case Intrinsic::is_constant:
+ llvm_unreachable("llvm.is.constant.* should have been lowered already");
+
case Intrinsic::launder_invariant_group:
case Intrinsic::strip_invariant_group:
case Intrinsic::expect: {
DAG.setRoot(Res);
return;
}
- case Intrinsic::objectsize: {
- // If we don't know by now, we're never going to know.
- ConstantInt *CI = dyn_cast<ConstantInt>(I.getArgOperand(1));
-
- assert(CI && "Non-constant type in __builtin_object_size?");
-
- SDValue Arg = getValue(I.getCalledValue());
- EVT Ty = Arg.getValueType();
-
- if (CI->isZero())
- Res = DAG.getConstant(-1ULL, sdl, Ty);
- else
- Res = DAG.getConstant(0, sdl, Ty);
-
- setValue(&I, Res);
- return;
- }
+ case Intrinsic::objectsize:
+ llvm_unreachable("llvm.objectsize.* should have been lowered already");
case Intrinsic::is_constant:
- // If this wasn't constant-folded away by now, then it's not a
- // constant.
- setValue(&I, DAG.getConstant(0, sdl, MVT::i1));
- return;
+ llvm_unreachable("llvm.is.constant.* should have been lowered already");
case Intrinsic::annotation:
case Intrinsic::ptr_annotation:
// TODO: add a pass insertion point here
addPass(createGCLoweringPass());
addPass(createShadowStackGCLoweringPass());
+ addPass(createLowerConstantIntrinsicsPass());
// Make sure that no unreachable blocks are instruction selected.
addPass(createUnreachableBlockEliminationPass());
#include "llvm/Transforms/Scalar/LoopUnrollAndJamPass.h"
#include "llvm/Transforms/Scalar/LoopUnrollPass.h"
#include "llvm/Transforms/Scalar/LowerAtomic.h"
+#include "llvm/Transforms/Scalar/LowerConstantIntrinsics.h"
#include "llvm/Transforms/Scalar/LowerExpectIntrinsic.h"
#include "llvm/Transforms/Scalar/LowerGuardIntrinsic.h"
#include "llvm/Transforms/Scalar/LowerWidenableCondition.h"
FunctionPassManager OptimizePM(DebugLogging);
OptimizePM.addPass(Float2IntPass());
+ OptimizePM.addPass(LowerConstantIntrinsicsPass());
+
// FIXME: We need to run some loop optimizations to re-rotate loops after
// simplify-cfg and others undo their rotation.
FUNCTION_PASS("loweratomic", LowerAtomicPass())
FUNCTION_PASS("lower-expect", LowerExpectIntrinsicPass())
FUNCTION_PASS("lower-guard-intrinsic", LowerGuardIntrinsicPass())
+FUNCTION_PASS("lower-constant-intrinsics", LowerConstantIntrinsicsPass())
FUNCTION_PASS("lower-widenable-condition", LowerWidenableConditionPass())
FUNCTION_PASS("guard-widening", GuardWideningPass())
FUNCTION_PASS("gvn", GVN())
MPM.add(createGlobalsAAWrapperPass());
MPM.add(createFloat2IntPass());
+ MPM.add(createLowerConstantIntrinsicsPass());
addExtensionsToPM(EP_VectorizerStart, MPM);
LoopUnswitch.cpp
LoopVersioningLICM.cpp
LowerAtomic.cpp
+ LowerConstantIntrinsics.cpp
LowerExpectIntrinsic.cpp
LowerGuardIntrinsic.cpp
LowerWidenableCondition.cpp
--- /dev/null
+//===- LowerConstantIntrinsics.cpp - Lower constant intrinsic calls -------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This pass lowers all remaining 'objectsize' 'is.constant' intrinsic calls
+// and provides constant propagation and basic CFG cleanup on the result.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Transforms/Scalar/LowerConstantIntrinsics.h"
+#include "llvm/ADT/PostOrderIterator.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/Analysis/InstructionSimplify.h"
+#include "llvm/Analysis/MemoryBuiltins.h"
+#include "llvm/Analysis/TargetLibraryInfo.h"
+#include "llvm/IR/BasicBlock.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/IntrinsicInst.h"
+#include "llvm/IR/Intrinsics.h"
+#include "llvm/IR/PatternMatch.h"
+#include "llvm/Pass.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Transforms/Scalar.h"
+#include "llvm/Transforms/Utils/Local.h"
+
+using namespace llvm;
+using namespace llvm::PatternMatch;
+
+#define DEBUG_TYPE "lower-is-constant-intrinsic"
+
+STATISTIC(IsConstantIntrinsicsHandled,
+ "Number of 'is.constant' intrinsic calls handled");
+STATISTIC(ObjectSizeIntrinsicsHandled,
+ "Number of 'objectsize' intrinsic calls handled");
+
+static Value *lowerIsConstantIntrinsic(IntrinsicInst *II) {
+ Value *Op = II->getOperand(0);
+
+ return isa<Constant>(Op) ? ConstantInt::getTrue(II->getType())
+ : ConstantInt::getFalse(II->getType());
+}
+
+static bool replaceConditionalBranchesOnConstant(Instruction *II,
+ Value *NewValue) {
+ bool HasDeadBlocks = false;
+ SmallSetVector<Instruction *, 8> Worklist;
+ replaceAndRecursivelySimplify(II, NewValue, nullptr, nullptr, nullptr,
+ &Worklist);
+ for (auto I : Worklist) {
+ BranchInst *BI = dyn_cast<BranchInst>(I);
+ if (!BI)
+ continue;
+ if (BI->isUnconditional())
+ continue;
+
+ BasicBlock *Target, *Other;
+ if (match(BI->getOperand(0), m_Zero())) {
+ Target = BI->getSuccessor(1);
+ Other = BI->getSuccessor(0);
+ } else if (match(BI->getOperand(0), m_One())) {
+ Target = BI->getSuccessor(0);
+ Other = BI->getSuccessor(1);
+ } else {
+ Target = nullptr;
+ Other = nullptr;
+ }
+ if (Target && Target != Other) {
+ BasicBlock *Source = BI->getParent();
+ Other->removePredecessor(Source);
+ BI->eraseFromParent();
+ BranchInst::Create(Target, Source);
+ if (pred_begin(Other) == pred_end(Other))
+ HasDeadBlocks = true;
+ }
+ }
+ return HasDeadBlocks;
+}
+
+static bool lowerConstantIntrinsics(Function &F, const TargetLibraryInfo *TLI) {
+ bool HasDeadBlocks = false;
+ const auto &DL = F.getParent()->getDataLayout();
+ SmallVector<WeakTrackingVH, 8> Worklist;
+
+ ReversePostOrderTraversal<Function *> RPOT(&F);
+ for (BasicBlock *BB : RPOT) {
+ for (Instruction &I: *BB) {
+ IntrinsicInst *II = dyn_cast<IntrinsicInst>(&I);
+ if (!II)
+ continue;
+ switch (II->getIntrinsicID()) {
+ default:
+ break;
+ case Intrinsic::is_constant:
+ case Intrinsic::objectsize:
+ Worklist.push_back(WeakTrackingVH(&I));
+ break;
+ }
+ }
+ }
+ for (WeakTrackingVH &VH: Worklist) {
+ // Items on the worklist can be mutated by earlier recursive replaces.
+ // This can remove the intrinsic as dead (VH == null), but also replace
+ // the intrinsic in place.
+ if (!VH)
+ continue;
+ IntrinsicInst *II = dyn_cast<IntrinsicInst>(&*VH);
+ if (!II)
+ continue;
+ Value *NewValue;
+ switch (II->getIntrinsicID()) {
+ default:
+ continue;
+ case Intrinsic::is_constant:
+ NewValue = lowerIsConstantIntrinsic(II);
+ IsConstantIntrinsicsHandled++;
+ break;
+ case Intrinsic::objectsize:
+ NewValue = lowerObjectSizeCall(II, DL, TLI, true);
+ ObjectSizeIntrinsicsHandled++;
+ break;
+ }
+ HasDeadBlocks |= replaceConditionalBranchesOnConstant(II, NewValue);
+ }
+ if (HasDeadBlocks)
+ removeUnreachableBlocks(F);
+ return !Worklist.empty();
+}
+
+PreservedAnalyses
+LowerConstantIntrinsicsPass::run(Function &F, FunctionAnalysisManager &AM) {
+ if (lowerConstantIntrinsics(F, AM.getCachedResult<TargetLibraryAnalysis>(F)))
+ return PreservedAnalyses::none();
+
+ return PreservedAnalyses::all();
+}
+
+namespace {
+/// Legacy pass for lowering is.constant intrinsics out of the IR.
+///
+/// When this pass is run over a function it converts is.constant intrinsics
+/// into 'true' or 'false'. This is completements the normal constand folding
+/// to 'true' as part of Instruction Simplify passes.
+class LowerConstantIntrinsics : public FunctionPass {
+public:
+ static char ID;
+ LowerConstantIntrinsics() : FunctionPass(ID) {
+ initializeLowerConstantIntrinsicsPass(*PassRegistry::getPassRegistry());
+ }
+
+ bool runOnFunction(Function &F) override {
+ auto *TLIP = getAnalysisIfAvailable<TargetLibraryInfoWrapperPass>();
+ const TargetLibraryInfo *TLI = TLIP ? &TLIP->getTLI(F) : nullptr;
+ return lowerConstantIntrinsics(F, TLI);
+ }
+};
+} // namespace
+
+char LowerConstantIntrinsics::ID = 0;
+INITIALIZE_PASS(LowerConstantIntrinsics, "lower-constant-intrinsics",
+ "Lower constant intrinsics", false, false)
+
+FunctionPass *llvm::createLowerConstantIntrinsicsPass() {
+ return new LowerConstantIntrinsics();
+}
initializeLoopVersioningLICMPass(Registry);
initializeLoopIdiomRecognizeLegacyPassPass(Registry);
initializeLowerAtomicLegacyPassPass(Registry);
+ initializeLowerConstantIntrinsicsPass(Registry);
initializeLowerExpectIntrinsicPass(Registry);
initializeLowerGuardIntrinsicLegacyPassPass(Registry);
initializeLowerWidenableConditionLegacyPassPass(Registry);
unwrap(PM)->add(createBasicAAWrapperPass());
}
+void LLVMAddLowerConstantIntrinsicsPass(LLVMPassManagerRef PM) {
+ unwrap(PM)->add(createLowerConstantIntrinsicsPass());
+}
+
void LLVMAddLowerExpectIntrinsicPass(LLVMPassManagerRef PM) {
unwrap(PM)->add(createLowerExpectIntrinsicPass());
}
ret void
}
-declare i64 @llvm.objectsize.i64(i8*, i1)
-declare i32 @llvm.objectsize.i32(i8*, i1)
-define void @test_objectsize(i8* %addr0, i8* %addr1) {
-; CHECK-LABEL: name: test_objectsize
-; CHECK: [[ADDR0:%[0-9]+]]:_(p0) = COPY $x0
-; CHECK: [[ADDR1:%[0-9]+]]:_(p0) = COPY $x1
-; CHECK: {{%[0-9]+}}:_(s64) = G_CONSTANT i64 -1
-; CHECK: {{%[0-9]+}}:_(s64) = G_CONSTANT i64 0
-; CHECK: {{%[0-9]+}}:_(s32) = G_CONSTANT i32 -1
-; CHECK: {{%[0-9]+}}:_(s32) = G_CONSTANT i32 0
- %size64.0 = call i64 @llvm.objectsize.i64(i8* %addr0, i1 0)
- %size64.intmin = call i64 @llvm.objectsize.i64(i8* %addr0, i1 1)
- %size32.0 = call i32 @llvm.objectsize.i32(i8* %addr0, i1 0)
- %size32.intmin = call i32 @llvm.objectsize.i32(i8* %addr0, i1 1)
- ret void
-}
-
define void @test_large_const(i128* %addr) {
; CHECK-LABEL: name: test_large_const
; CHECK: [[ADDR:%[0-9]+]]:_(p0) = COPY $x0
; CHECK-NEXT: Module Verifier
; CHECK-NEXT: Lower Garbage Collection Instructions
; CHECK-NEXT: Shadow Stack GC Lowering
+; CHECK-NEXT: Lower constant intrinsics
; CHECK-NEXT: Remove unreachable blocks from the CFG
; CHECK-NEXT: Instrument function entry/exit with calls to e.g. mcount() (post inlining)
; CHECK-NEXT: Scalarize Masked Memory Intrinsics
; CHECK-NEXT: Expand memcmp() to load/stores
; CHECK-NEXT: Lower Garbage Collection Instructions
; CHECK-NEXT: Shadow Stack GC Lowering
+; CHECK-NEXT: Lower constant intrinsics
; CHECK-NEXT: Remove unreachable blocks from the CFG
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Natural Loop Information
; CHECK-NEXT: Expand memcmp() to load/stores
; CHECK-NEXT: Lower Garbage Collection Instructions
; CHECK-NEXT: Shadow Stack GC Lowering
+; CHECK-NEXT: Lower constant intrinsics
; CHECK-NEXT: Remove unreachable blocks from the CFG
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Natural Loop Information
+++ /dev/null
-; RUN: opt -O2 -S < %s | FileCheck %s
-; RUN: llc -o /dev/null 2>&1 < %s
-; RUN: llc -O0 -o /dev/null 2>&1 < %s
-
-;; The llc runs above are just to ensure it doesn't blow up upon
-;; seeing an is_constant intrinsic.
-
-declare i1 @llvm.is.constant.i32(i32 %a)
-declare i1 @llvm.is.constant.i64(i64 %a)
-declare i1 @llvm.is.constant.i256(i256 %a)
-declare i1 @llvm.is.constant.v2i64(<2 x i64> %a)
-declare i1 @llvm.is.constant.f32(float %a)
-declare i1 @llvm.is.constant.sl_i32i32s({i32, i32} %a)
-declare i1 @llvm.is.constant.a2i64([2 x i64] %a)
-declare i1 @llvm.is.constant.p0i64(i64* %a)
-
-;; Basic test that optimization folds away the is.constant when given
-;; a constant.
-define i1 @test_constant() #0 {
-; CHECK-LABEL: @test_constant(
-; CHECK-NOT: llvm.is.constant
-; CHECK: ret i1 true
-%y = call i1 @llvm.is.constant.i32(i32 44)
- ret i1 %y
-}
-
-;; And test that the intrinsic sticks around when given a
-;; non-constant.
-define i1 @test_nonconstant(i32 %x) #0 {
-; CHECK-LABEL: @test_nonconstant(
-; CHECK: @llvm.is.constant
- %y = call i1 @llvm.is.constant.i32(i32 %x)
- ret i1 %y
-}
-
-;; Ensure that nested is.constants fold.
-define i32 @test_nested() #0 {
-; CHECK-LABEL: @test_nested(
-; CHECK-NOT: llvm.is.constant
-; CHECK: ret i32 13
- %val1 = call i1 @llvm.is.constant.i32(i32 27)
- %val2 = zext i1 %val1 to i32
- %val3 = add i32 %val2, 12
- %1 = call i1 @llvm.is.constant.i32(i32 %val3)
- %2 = zext i1 %1 to i32
- %3 = add i32 %2, 12
- ret i32 %3
-}
-
-@G = global [2 x i64] zeroinitializer
-define i1 @test_global() #0 {
-; CHECK-LABEL: @test_global(
-; CHECK: llvm.is.constant
- %ret = call i1 @llvm.is.constant.p0i64(i64* getelementptr ([2 x i64], [2 x i64]* @G, i32 0, i32 0))
- ret i1 %ret
-}
-
-define i1 @test_diff() #0 {
-; CHECK-LABEL: @test_diff(
- %ret = call i1 @llvm.is.constant.i64(i64 sub (
- i64 ptrtoint (i64* getelementptr inbounds ([2 x i64], [2 x i64]* @G, i64 0, i64 1) to i64),
- i64 ptrtoint ([2 x i64]* @G to i64)))
- ret i1 %ret
-}
-
-define i1 @test_various_types(i256 %int, float %float, <2 x i64> %vec, {i32, i32} %struct, [2 x i64] %arr, i64* %ptr) #0 {
-; CHECK-LABEL: @test_various_types(
-; CHECK: llvm.is.constant
-; CHECK: llvm.is.constant
-; CHECK: llvm.is.constant
-; CHECK: llvm.is.constant
-; CHECK: llvm.is.constant
-; CHECK: llvm.is.constant
-; CHECK-NOT: llvm.is.constant
- %v1 = call i1 @llvm.is.constant.i256(i256 %int)
- %v2 = call i1 @llvm.is.constant.f32(float %float)
- %v3 = call i1 @llvm.is.constant.v2i64(<2 x i64> %vec)
- %v4 = call i1 @llvm.is.constant.sl_i32i32s({i32, i32} %struct)
- %v5 = call i1 @llvm.is.constant.a2i64([2 x i64] %arr)
- %v6 = call i1 @llvm.is.constant.p0i64(i64* %ptr)
-
- %c1 = call i1 @llvm.is.constant.i256(i256 -1)
- %c2 = call i1 @llvm.is.constant.f32(float 17.0)
- %c3 = call i1 @llvm.is.constant.v2i64(<2 x i64> <i64 -1, i64 44>)
- %c4 = call i1 @llvm.is.constant.sl_i32i32s({i32, i32} {i32 -1, i32 32})
- %c5 = call i1 @llvm.is.constant.a2i64([2 x i64] [i64 -1, i64 32])
- %c6 = call i1 @llvm.is.constant.p0i64(i64* inttoptr (i32 42 to i64*))
-
- %x1 = add i1 %v1, %c1
- %x2 = add i1 %v2, %c2
- %x3 = add i1 %v3, %c3
- %x4 = add i1 %v4, %c4
- %x5 = add i1 %v5, %c5
- %x6 = add i1 %v6, %c6
-
- %res2 = add i1 %x1, %x2
- %res3 = add i1 %res2, %x3
- %res4 = add i1 %res3, %x4
- %res5 = add i1 %res4, %x5
- %res6 = add i1 %res5, %x6
-
- ret i1 %res6
-}
-
-define i1 @test_various_types2() #0 {
-; CHECK-LABEL: @test_various_types2(
-; CHECK: ret i1 false
- %r = call i1 @test_various_types(i256 -1, float 22.0, <2 x i64> <i64 -1, i64 44>,
- {i32, i32} {i32 -1, i32 55}, [2 x i64] [i64 -1, i64 55],
- i64* inttoptr (i64 42 to i64*))
- ret i1 %r
-}
-
-attributes #0 = { nounwind uwtable }
; CHECK-NEXT: Module Verifier
; CHECK-NEXT: Lower Garbage Collection Instructions
; CHECK-NEXT: Shadow Stack GC Lowering
+; CHECK-NEXT: Lower constant intrinsics
; CHECK-NEXT: Remove unreachable blocks from the CFG
; CHECK-NEXT: Instrument function entry/exit with calls to e.g. mcount() (post inlining)
; CHECK-NEXT: Scalarize Masked Memory Intrinsics
; CHECK-NEXT: Expand memcmp() to load/stores
; CHECK-NEXT: Lower Garbage Collection Instructions
; CHECK-NEXT: Shadow Stack GC Lowering
+; CHECK-NEXT: Lower constant intrinsics
; CHECK-NEXT: Remove unreachable blocks from the CFG
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Natural Loop Information
+++ /dev/null
-; RUN: llc -O2 < %s | FileCheck %s --check-prefix=CHECK-O2 --check-prefix=CHECK
-; RUN: llc -O0 -fast-isel < %s | FileCheck %s --check-prefix=CHECK-O0 --check-prefix=CHECK
-; RUN: llc -O0 -fast-isel=0 < %s | FileCheck %s --check-prefix=CHECK-O0 --check-prefix=CHECK
-; RUN: llc -O0 -global-isel < %s | FileCheck %s --check-prefix=CHECK-O0 --check-prefix=CHECK
-
-;; Ensure that an unfoldable is.constant gets lowered reasonably in
-;; optimized codegen, in particular, that the "true" branch is
-;; eliminated.
-;;
-;; This isn't asserting any specific output from non-optimized runs,
-;; (e.g., currently the not-taken branch does not get eliminated). But
-;; it does ensure that lowering succeeds in all 3 codegen paths.
-
-target triple = "x86_64-unknown-linux-gnu"
-
-declare i1 @llvm.is.constant.i32(i32 %a) nounwind readnone
-declare i1 @llvm.is.constant.i64(i64 %a) nounwind readnone
-declare i64 @llvm.objectsize.i64.p0i8(i8*, i1, i1, i1) nounwind readnone
-
-declare i32 @subfun_1()
-declare i32 @subfun_2()
-
-define i32 @test_branch(i32 %in) nounwind {
-; CHECK-LABEL: test_branch:
-; CHECK-O2: %bb.0:
-; CHECK-O2-NEXT: jmp subfun_2
- %v = call i1 @llvm.is.constant.i32(i32 %in)
- br i1 %v, label %True, label %False
-
-True:
- %call1 = tail call i32 @subfun_1()
- ret i32 %call1
-
-False:
- %call2 = tail call i32 @subfun_2()
- ret i32 %call2
-}
-
-;; llvm.objectsize is another tricky case which gets folded to -1 very
-;; late in the game. We'd like to ensure that llvm.is.constant of
-;; llvm.objectsize is true.
-define i1 @test_objectsize(i8* %obj) nounwind {
-; CHECK-LABEL: test_objectsize:
-; CHECK-O2: %bb.0:
-; CHECK-O2: movb $1, %al
-; CHECK-O2-NEXT: retq
- %os = call i64 @llvm.objectsize.i64.p0i8(i8* %obj, i1 false, i1 false, i1 false)
- %v = call i1 @llvm.is.constant.i64(i64 %os)
- ret i1 %v
-}
+++ /dev/null
-; RUN: llc -O0 < %s | FileCheck %s
-
-; ModuleID = 'ts.c'
-target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
-target triple = "x86_64-apple-darwin10.0"
-
-@p = common global i8* null, align 8 ; <i8**> [#uses=4]
-@.str = private constant [3 x i8] c"Hi\00" ; <[3 x i8]*> [#uses=1]
-
-define void @bar() nounwind ssp {
-entry:
- %tmp = load i8*, i8** @p ; <i8*> [#uses=1]
- %0 = call i64 @llvm.objectsize.i64.p0i8(i8* %tmp, i1 0) ; <i64> [#uses=1]
- %cmp = icmp ne i64 %0, -1 ; <i1> [#uses=1]
-; CHECK: movq $-1, [[RAX:%r..]]
-; CHECK: cmpq $-1, [[RAX]]
- br i1 %cmp, label %cond.true, label %cond.false
-
-cond.true: ; preds = %entry
- %tmp1 = load i8*, i8** @p ; <i8*> [#uses=1]
- %tmp2 = load i8*, i8** @p ; <i8*> [#uses=1]
- %1 = call i64 @llvm.objectsize.i64.p0i8(i8* %tmp2, i1 1) ; <i64> [#uses=1]
- %call = call i8* @__strcpy_chk(i8* %tmp1, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i32 0, i32 0), i64 %1) ssp ; <i8*> [#uses=1]
- br label %cond.end
-
-cond.false: ; preds = %entry
- %tmp3 = load i8*, i8** @p ; <i8*> [#uses=1]
- %call4 = call i8* @__inline_strcpy_chk(i8* %tmp3, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i32 0, i32 0)) ssp ; <i8*> [#uses=1]
- br label %cond.end
-
-cond.end: ; preds = %cond.false, %cond.true
- %cond = phi i8* [ %call, %cond.true ], [ %call4, %cond.false ] ; <i8*> [#uses=0]
- ret void
-}
-
-declare i64 @llvm.objectsize.i64.p0i8(i8*, i1) nounwind readonly
-
-declare i8* @__strcpy_chk(i8*, i8*, i64) ssp
-
-define internal i8* @__inline_strcpy_chk(i8* %__dest, i8* %__src) nounwind ssp {
-entry:
- %retval = alloca i8* ; <i8**> [#uses=2]
- %__dest.addr = alloca i8* ; <i8**> [#uses=3]
- %__src.addr = alloca i8* ; <i8**> [#uses=2]
- store i8* %__dest, i8** %__dest.addr
- store i8* %__src, i8** %__src.addr
- %tmp = load i8*, i8** %__dest.addr ; <i8*> [#uses=1]
- %tmp1 = load i8*, i8** %__src.addr ; <i8*> [#uses=1]
- %tmp2 = load i8*, i8** %__dest.addr ; <i8*> [#uses=1]
- %0 = call i64 @llvm.objectsize.i64.p0i8(i8* %tmp2, i1 1) ; <i64> [#uses=1]
- %call = call i8* @__strcpy_chk(i8* %tmp, i8* %tmp1, i64 %0) ssp ; <i8*> [#uses=1]
- store i8* %call, i8** %retval
- %1 = load i8*, i8** %retval ; <i8*> [#uses=1]
- ret i8* %1
-}
; CHECK-O-NEXT: Running pass: ModuleToFunctionPassAdaptor<{{.*}}PassManager{{.*}}>
; CHECK-O-NEXT: Starting llvm::Function pass manager run.
; CHECK-O-NEXT: Running pass: Float2IntPass
+; CHECK-O-NEXT: Running pass: LowerConstantIntrinsicsPass on foo
; CHECK-EP-VECTORIZER-START-NEXT: Running pass: NoOpFunctionPass
; CHECK-O-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}LoopRotatePass
; CHECK-O-NEXT: Starting llvm::Function pass manager run.
; CHECK-POSTLINK-O-NEXT: Running pass: ModuleToFunctionPassAdaptor<{{.*}}PassManager{{.*}}>
; CHECK-POSTLINK-O-NEXT: Starting llvm::Function pass manager run.
; CHECK-POSTLINK-O-NEXT: Running pass: Float2IntPass
+; CHECK-POSTLINK-O-NEXT: Running pass: LowerConstantIntrinsicsPass
; CHECK-POSTLINK-O-NEXT: Running pass: FunctionToLoopPassAdaptor<{{.*}}LoopRotatePass
; CHECK-POSTLINK-O-NEXT: Starting llvm::Function pass manager run
; CHECK-POSTLINK-O-NEXT: Running pass: LoopSimplifyPass
; CHECK-NEXT: FunctionPass Manager
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Float to int
+; CHECK-NEXT: Lower constant intrinsics
+; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Memory SSA
; CHECK-NEXT: FunctionPass Manager
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Float to int
+; CHECK-NEXT: Lower constant intrinsics
+; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Memory SSA
; CHECK-NEXT: FunctionPass Manager
; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Float to int
+; CHECK-NEXT: Lower constant intrinsics
+; CHECK-NEXT: Dominator Tree Construction
; CHECK-NEXT: Basic Alias Analysis (stateless AA impl)
; CHECK-NEXT: Function Alias Analysis Results
; CHECK-NEXT: Memory SSA
ret void
}
-; This was crashing when trying to delay instruction removal/deletion.
-
-declare i64 @llvm.objectsize.i64.p0i8(i8*, i1 immarg, i1 immarg, i1 immarg) #0
-
-define hidden fastcc void @crash() {
-; CHECK-LABEL: @crash(
-; CHECK-NEXT: [[TMP1:%.*]] = call { i64, i1 } @llvm.uadd.with.overflow.i64(i64 undef, i64 undef)
-; CHECK-NEXT: [[MATH:%.*]] = extractvalue { i64, i1 } [[TMP1]], 0
-; CHECK-NEXT: [[OV:%.*]] = extractvalue { i64, i1 } [[TMP1]], 1
-; CHECK-NEXT: [[T2:%.*]] = select i1 undef, i1 undef, i1 [[OV]]
-; CHECK-NEXT: unreachable
-;
- %t0 = add i64 undef, undef
- %t1 = icmp ult i64 %t0, undef
- %t2 = select i1 undef, i1 undef, i1 %t1
- %t3 = call i64 @llvm.objectsize.i64.p0i8(i8* nonnull undef, i1 false, i1 false, i1 false)
- %t4 = icmp ugt i64 %t3, 7
- unreachable
-}
-
; Check that every instruction inserted by -codegenprepare has a debug location.
; DEBUG: CheckModuleDebugify: PASS
+++ /dev/null
-; RUN: opt -codegenprepare -S < %s | FileCheck %s
-
-; Ensure we act sanely on overflow.
-; CHECK-LABEL: define i32 @bar
-define i32 @bar() {
-entry:
- ; CHECK: ret i32 -1
- %az = alloca [2147483649 x i32], align 16
- %a = alloca i8*, align 8
- %arraydecay = getelementptr inbounds [2147483649 x i32], [2147483649 x i32]* %az, i32 0, i32 0
- %0 = bitcast i32* %arraydecay to i8*
- store i8* %0, i8** %a, align 8
- %1 = load i8*, i8** %a, align 8
- %2 = call i32 @llvm.objectsize.i32.p0i8(i8* %1, i1 false)
- ret i32 %2
-}
-
-; CHECK-LABEL: define i32 @baz
-define i32 @baz(i32 %n) {
-entry:
- ; CHECK: ret i32 -1
- %az = alloca [1 x i32], align 16
- %bz = alloca [4294967297 x i32], align 16
- %tobool = icmp ne i32 %n, 0
- %arraydecay = getelementptr inbounds [1 x i32], [1 x i32]* %az, i64 0, i64 0
- %arraydecay1 = getelementptr inbounds [4294967297 x i32], [4294967297 x i32]* %bz, i64 0, i64 0
- %cond = select i1 %tobool, i32* %arraydecay, i32* %arraydecay1
- %0 = bitcast i32* %cond to i8*
- %1 = call i32 @llvm.objectsize.i32.p0i8(i8* %0, i1 false)
- ret i32 %1
-}
-
-declare i32 @llvm.objectsize.i32.p0i8(i8*, i1)
-
-; The following tests were generated by:
-; #include<stdlib.h>
-; #define STATIC_BUF_SIZE 10
-; #define LARGER_BUF_SIZE 30
-;
-; size_t foo1(int flag) {
-; char *cptr;
-; char chararray[LARGER_BUF_SIZE];
-; char chararray2[STATIC_BUF_SIZE];
-; if(flag)
-; cptr = chararray2;
-; else
-; cptr = chararray;
-;
-; return __builtin_object_size(cptr, 2);
-; }
-;
-; size_t foo2(int n) {
-; char Small[10];
-; char Large[20];
-; char *Ptr = n ? Small : Large + 19;
-; return __builtin_object_size(Ptr, 0);
-; }
-;
-; void foo() {
-; size_t ret;
-; size_t ret1;
-; ret = foo1(0);
-; ret1 = foo2(0);
-; printf("\n%d %d\n", ret, ret1);
-; }
-
-target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64-unknown-linux-gnu"
-
-@.str = private unnamed_addr constant [8 x i8] c"\0A%d %d\0A\00", align 1
-
-define i64 @foo1(i32 %flag) {
-entry:
- %chararray = alloca [30 x i8], align 16
- %chararray2 = alloca [10 x i8], align 1
- %0 = getelementptr inbounds [30 x i8], [30 x i8]* %chararray, i64 0, i64 0
- call void @llvm.lifetime.start.p0i8(i64 30, i8* %0)
- %1 = getelementptr inbounds [10 x i8], [10 x i8]* %chararray2, i64 0, i64 0
- call void @llvm.lifetime.start.p0i8(i64 10, i8* %1)
- %tobool = icmp eq i32 %flag, 0
- %cptr.0 = select i1 %tobool, i8* %0, i8* %1
- %2 = call i64 @llvm.objectsize.i64.p0i8(i8* %cptr.0, i1 true)
- call void @llvm.lifetime.end.p0i8(i64 10, i8* %1)
- call void @llvm.lifetime.end.p0i8(i64 30, i8* %0)
- ret i64 %2
-; CHECK-LABEL: foo1
-; CHECK: ret i64 10
-}
-
-declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture)
-
-declare i64 @llvm.objectsize.i64.p0i8(i8*, i1)
-
-declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture)
-
-define i64 @foo2(i32 %n) {
-entry:
- %Small = alloca [10 x i8], align 1
- %Large = alloca [20 x i8], align 16
- %0 = getelementptr inbounds [10 x i8], [10 x i8]* %Small, i64 0, i64 0
- call void @llvm.lifetime.start.p0i8(i64 10, i8* %0)
- %1 = getelementptr inbounds [20 x i8], [20 x i8]* %Large, i64 0, i64 0
- call void @llvm.lifetime.start.p0i8(i64 20, i8* %1)
- %tobool = icmp ne i32 %n, 0
- %add.ptr = getelementptr inbounds [20 x i8], [20 x i8]* %Large, i64 0, i64 19
- %cond = select i1 %tobool, i8* %0, i8* %add.ptr
- %2 = call i64 @llvm.objectsize.i64.p0i8(i8* %cond, i1 false)
- call void @llvm.lifetime.end.p0i8(i64 20, i8* %1)
- call void @llvm.lifetime.end.p0i8(i64 10, i8* %0)
- ret i64 %2
-; CHECK-LABEL: foo2
-; CHECK: ret i64 10
-}
-
-define void @foo() {
-entry:
- %call = tail call i64 @foo1(i32 0)
- %call1 = tail call i64 @foo2(i32 0)
- %call2 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i64 %call, i64 %call1)
- ret void
-}
-
-declare i32 @printf(i8* nocapture readonly, ...)
--- /dev/null
+; RUN: opt -lower-constant-intrinsics -S < %s | FileCheck %s
+
+;; Ensure that an unfoldable is.constant gets lowered reasonably in
+;; optimized codegen, in particular, that the "true" branch is
+;; eliminated.
+
+;; Also ensure that any unfoldable objectsize is resolved in order.
+
+;; CHECK-NOT: tail call i32 @subfun_1()
+;; CHECK: tail call i32 @subfun_2()
+;; CHECK-NOT: tail call i32 @subfun_1()
+
+declare i1 @llvm.is.constant.i32(i32 %a) nounwind readnone
+declare i1 @llvm.is.constant.i64(i64 %a) nounwind readnone
+declare i1 @llvm.is.constant.i256(i256 %a) nounwind readnone
+declare i1 @llvm.is.constant.v2i64(<2 x i64> %a) nounwind readnone
+declare i1 @llvm.is.constant.f32(float %a) nounwind readnone
+declare i1 @llvm.is.constant.sl_i32i32s({i32, i32} %a) nounwind readnone
+declare i1 @llvm.is.constant.a2i64([2 x i64] %a) nounwind readnone
+declare i1 @llvm.is.constant.p0i64(i64* %a) nounwind readnone
+
+declare i64 @llvm.objectsize.i64.p0i8(i8*, i1, i1, i1) nounwind readnone
+
+declare i32 @subfun_1()
+declare i32 @subfun_2()
+
+define i32 @test_branch(i32 %in) nounwind {
+ %v = call i1 @llvm.is.constant.i32(i32 %in)
+ br i1 %v, label %True, label %False
+
+True:
+ %call1 = tail call i32 @subfun_1()
+ ret i32 %call1
+
+False:
+ %call2 = tail call i32 @subfun_2()
+ ret i32 %call2
+}
+
+;; llvm.objectsize is another tricky case which gets folded to -1 very
+;; late in the game. We'd like to ensure that llvm.is.constant of
+;; llvm.objectsize is true.
+define i1 @test_objectsize(i8* %obj) nounwind {
+;; CHECK-LABEL: test_objectsize
+;; CHECK-NOT: llvm.objectsize
+;; CHECK-NOT: llvm.is.constant
+;; CHECK: ret i1 true
+ %os = call i64 @llvm.objectsize.i64.p0i8(i8* %obj, i1 false, i1 false, i1 false)
+ %os1 = add i64 %os, 1
+ %v = call i1 @llvm.is.constant.i64(i64 %os1)
+ ret i1 %v
+}
+
+@test_phi_a = dso_local global i32 0, align 4
+declare dso_local i32 @test_phi_b(...)
+
+; Function Attrs: nounwind uwtable
+define dso_local i32 @test_phi() {
+entry:
+ %0 = load i32, i32* @test_phi_a, align 4
+ %1 = tail call i1 @llvm.is.constant.i32(i32 %0)
+ br i1 %1, label %cond.end, label %cond.false
+
+cond.false: ; preds = %entry
+ %call = tail call i32 bitcast (i32 (...)* @test_phi_b to i32 ()*)() #3
+ %.pre = load i32, i32* @test_phi_a, align 4
+ br label %cond.end
+
+cond.end: ; preds = %entry, %cond.false
+ %2 = phi i32 [ %.pre, %cond.false ], [ %0, %entry ]
+ %cond = phi i32 [ %call, %cond.false ], [ 1, %entry ]
+ %cmp = icmp eq i32 %cond, %2
+ br i1 %cmp, label %cond.true1, label %cond.end4
+
+cond.true1: ; preds = %cond.end
+ %call2 = tail call i32 bitcast (i32 (...)* @test_phi_b to i32 ()*)() #3
+ br label %cond.end4
+
+cond.end4: ; preds = %cond.end, %cond.true1
+ ret i32 undef
+}
+
+define i1 @test_various_types(i256 %int, float %float, <2 x i64> %vec, {i32, i32} %struct, [2 x i64] %arr, i64* %ptr) #0 {
+; CHECK-LABEL: @test_various_types(
+; CHECK-NOT: llvm.is.constant
+ %v1 = call i1 @llvm.is.constant.i256(i256 %int)
+ %v2 = call i1 @llvm.is.constant.f32(float %float)
+ %v3 = call i1 @llvm.is.constant.v2i64(<2 x i64> %vec)
+ %v4 = call i1 @llvm.is.constant.sl_i32i32s({i32, i32} %struct)
+ %v5 = call i1 @llvm.is.constant.a2i64([2 x i64] %arr)
+ %v6 = call i1 @llvm.is.constant.p0i64(i64* %ptr)
+
+ %c1 = call i1 @llvm.is.constant.i256(i256 -1)
+ %c2 = call i1 @llvm.is.constant.f32(float 17.0)
+ %c3 = call i1 @llvm.is.constant.v2i64(<2 x i64> <i64 -1, i64 44>)
+ %c4 = call i1 @llvm.is.constant.sl_i32i32s({i32, i32} {i32 -1, i32 32})
+ %c5 = call i1 @llvm.is.constant.a2i64([2 x i64] [i64 -1, i64 32])
+ %c6 = call i1 @llvm.is.constant.p0i64(i64* inttoptr (i32 42 to i64*))
+
+ %x1 = add i1 %v1, %c1
+ %x2 = add i1 %v2, %c2
+ %x3 = add i1 %v3, %c3
+ %x4 = add i1 %v4, %c4
+ %x5 = add i1 %v5, %c5
+ %x6 = add i1 %v6, %c6
+
+ %res2 = add i1 %x1, %x2
+ %res3 = add i1 %res2, %x3
+ %res4 = add i1 %res3, %x4
+ %res5 = add i1 %res4, %x5
+ %res6 = add i1 %res5, %x6
+
+ ret i1 %res6
+}
-; RUN: opt -S -codegenprepare %s -o - | FileCheck %s
+; RUN: opt -S -lower-constant-intrinsics %s -o - | FileCheck %s
;
; Ensure that we don't {crash,return a bad value} when given an alloca larger
; than what a pointer can represent.
-; RUN: opt -codegenprepare -S < %s | FileCheck %s
+; RUN: opt -lower-constant-intrinsics -S < %s | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
target triple = "x86_64-apple-darwin10.0.0"
+declare i64 @llvm.objectsize.i64(i8*, i1, i1, i1) nounwind readonly
+declare i64 @llvm.objectsize.i64.p1i8(i8 addrspace(1)*, i1, i1, i1) nounwind readonly
+declare void @llvm.trap() nounwind
+
; CHECK-LABEL: @test1(
; objectsize should fold to a constant, which causes the branch to fold to an
-; uncond branch. Next, we fold the control flow alltogether.
-; rdar://8785296
+; uncond branch.
define i32 @test1(i8* %ptr) nounwind ssp noredzone align 2 {
entry:
%0 = tail call i64 @llvm.objectsize.i64(i8* %ptr, i1 false, i1 false, i1 false)
br i1 %1, label %T, label %trap
; CHECK: entry:
-; CHECK-NOT: br label %
+; CHECK-NOT: label %trap
trap: ; preds = %0, %entry
tail call void @llvm.trap() noreturn nounwind
i1 false, i1 false)
ret i64 %0
}
-
-
-declare i64 @llvm.objectsize.i64(i8*, i1, i1, i1) nounwind readonly
-declare i64 @llvm.objectsize.i64.p1i8(i8 addrspace(1)*, i1, i1, i1) nounwind readonly
-
-declare void @llvm.trap() nounwind
"LowerAtomic.cpp",
"LowerExpectIntrinsic.cpp",
"LowerGuardIntrinsic.cpp",
+ "LowerConstantIntrinsics.cpp",
"LowerWidenableCondition.cpp",
"MakeGuardsExplicit.cpp",
"MemCpyOptimizer.cpp",
projects / llvm / commitdiff