aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/libs/llvm12/lib/Transforms/Utils/CanonicalizeAliases.cpp
diff options
context:
space:
mode:
authororivej <orivej@yandex-team.ru>2022-02-10 16:44:49 +0300
committerDaniil Cherednik <dcherednik@yandex-team.ru>2022-02-10 16:44:49 +0300
commit718c552901d703c502ccbefdfc3c9028d608b947 (patch)
tree46534a98bbefcd7b1f3faa5b52c138ab27db75b7 /contrib/libs/llvm12/lib/Transforms/Utils/CanonicalizeAliases.cpp
parente9656aae26e0358d5378e5b63dcac5c8dbe0e4d0 (diff)
downloadydb-718c552901d703c502ccbefdfc3c9028d608b947.tar.gz
Restoring authorship annotation for <orivej@yandex-team.ru>. Commit 1 of 2.
Diffstat (limited to 'contrib/libs/llvm12/lib/Transforms/Utils/CanonicalizeAliases.cpp')
-rw-r--r--contrib/libs/llvm12/lib/Transforms/Utils/CanonicalizeAliases.cpp210
1 files changed, 105 insertions, 105 deletions
diff --git a/contrib/libs/llvm12/lib/Transforms/Utils/CanonicalizeAliases.cpp b/contrib/libs/llvm12/lib/Transforms/Utils/CanonicalizeAliases.cpp
index 6b01c0c71d..295fc67108 100644
--- a/contrib/libs/llvm12/lib/Transforms/Utils/CanonicalizeAliases.cpp
+++ b/contrib/libs/llvm12/lib/Transforms/Utils/CanonicalizeAliases.cpp
@@ -1,105 +1,105 @@
-//===- CanonicalizeAliases.cpp - ThinLTO Support: Canonicalize Aliases ----===//
-//
-// 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
-//
-//===----------------------------------------------------------------------===//
-//
-// Currently this file implements partial alias canonicalization, to
-// flatten chains of aliases (also done by GlobalOpt, but not on for
-// O0 compiles). E.g.
-// @a = alias i8, i8 *@b
-// @b = alias i8, i8 *@g
-//
-// will be converted to:
-// @a = alias i8, i8 *@g <-- @a is now an alias to base object @g
-// @b = alias i8, i8 *@g
-//
-// Eventually this file will implement full alias canonicalation, so that
-// all aliasees are private anonymous values. E.g.
-// @a = alias i8, i8 *@g
-// @g = global i8 0
-//
-// will be converted to:
-// @0 = private global
-// @a = alias i8, i8* @0
-// @g = alias i8, i8* @0
-//
-// This simplifies optimization and ThinLTO linking of the original symbols.
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Transforms/Utils/CanonicalizeAliases.h"
-#include "llvm/IR/Operator.h"
-#include "llvm/IR/ValueHandle.h"
-#include "llvm/InitializePasses.h"
-#include "llvm/Pass.h"
-
-using namespace llvm;
-
-namespace {
-
-static Constant *canonicalizeAlias(Constant *C, bool &Changed) {
- if (auto *GA = dyn_cast<GlobalAlias>(C)) {
- auto *NewAliasee = canonicalizeAlias(GA->getAliasee(), Changed);
- if (NewAliasee != GA->getAliasee()) {
- GA->setAliasee(NewAliasee);
- Changed = true;
- }
- return NewAliasee;
- }
-
- auto *CE = dyn_cast<ConstantExpr>(C);
- if (!CE)
- return C;
-
- std::vector<Constant *> Ops;
- for (Use &U : CE->operands())
- Ops.push_back(canonicalizeAlias(cast<Constant>(U), Changed));
- return CE->getWithOperands(Ops);
-}
-
-/// Convert aliases to canonical form.
-static bool canonicalizeAliases(Module &M) {
- bool Changed = false;
- for (auto &GA : M.aliases())
- canonicalizeAlias(&GA, Changed);
- return Changed;
-}
-
-// Legacy pass that canonicalizes aliases.
-class CanonicalizeAliasesLegacyPass : public ModulePass {
-
-public:
- /// Pass identification, replacement for typeid
- static char ID;
-
- /// Specify pass name for debug output
- StringRef getPassName() const override { return "Canonicalize Aliases"; }
-
- explicit CanonicalizeAliasesLegacyPass() : ModulePass(ID) {}
-
- bool runOnModule(Module &M) override { return canonicalizeAliases(M); }
-};
-char CanonicalizeAliasesLegacyPass::ID = 0;
-
-} // anonymous namespace
-
-PreservedAnalyses CanonicalizeAliasesPass::run(Module &M,
- ModuleAnalysisManager &AM) {
- if (!canonicalizeAliases(M))
- return PreservedAnalyses::all();
-
- return PreservedAnalyses::none();
-}
-
-INITIALIZE_PASS_BEGIN(CanonicalizeAliasesLegacyPass, "canonicalize-aliases",
- "Canonicalize aliases", false, false)
-INITIALIZE_PASS_END(CanonicalizeAliasesLegacyPass, "canonicalize-aliases",
- "Canonicalize aliases", false, false)
-
-namespace llvm {
-ModulePass *createCanonicalizeAliasesPass() {
- return new CanonicalizeAliasesLegacyPass();
-}
-} // namespace llvm
+//===- CanonicalizeAliases.cpp - ThinLTO Support: Canonicalize Aliases ----===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// Currently this file implements partial alias canonicalization, to
+// flatten chains of aliases (also done by GlobalOpt, but not on for
+// O0 compiles). E.g.
+// @a = alias i8, i8 *@b
+// @b = alias i8, i8 *@g
+//
+// will be converted to:
+// @a = alias i8, i8 *@g <-- @a is now an alias to base object @g
+// @b = alias i8, i8 *@g
+//
+// Eventually this file will implement full alias canonicalation, so that
+// all aliasees are private anonymous values. E.g.
+// @a = alias i8, i8 *@g
+// @g = global i8 0
+//
+// will be converted to:
+// @0 = private global
+// @a = alias i8, i8* @0
+// @g = alias i8, i8* @0
+//
+// This simplifies optimization and ThinLTO linking of the original symbols.
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Transforms/Utils/CanonicalizeAliases.h"
+#include "llvm/IR/Operator.h"
+#include "llvm/IR/ValueHandle.h"
+#include "llvm/InitializePasses.h"
+#include "llvm/Pass.h"
+
+using namespace llvm;
+
+namespace {
+
+static Constant *canonicalizeAlias(Constant *C, bool &Changed) {
+ if (auto *GA = dyn_cast<GlobalAlias>(C)) {
+ auto *NewAliasee = canonicalizeAlias(GA->getAliasee(), Changed);
+ if (NewAliasee != GA->getAliasee()) {
+ GA->setAliasee(NewAliasee);
+ Changed = true;
+ }
+ return NewAliasee;
+ }
+
+ auto *CE = dyn_cast<ConstantExpr>(C);
+ if (!CE)
+ return C;
+
+ std::vector<Constant *> Ops;
+ for (Use &U : CE->operands())
+ Ops.push_back(canonicalizeAlias(cast<Constant>(U), Changed));
+ return CE->getWithOperands(Ops);
+}
+
+/// Convert aliases to canonical form.
+static bool canonicalizeAliases(Module &M) {
+ bool Changed = false;
+ for (auto &GA : M.aliases())
+ canonicalizeAlias(&GA, Changed);
+ return Changed;
+}
+
+// Legacy pass that canonicalizes aliases.
+class CanonicalizeAliasesLegacyPass : public ModulePass {
+
+public:
+ /// Pass identification, replacement for typeid
+ static char ID;
+
+ /// Specify pass name for debug output
+ StringRef getPassName() const override { return "Canonicalize Aliases"; }
+
+ explicit CanonicalizeAliasesLegacyPass() : ModulePass(ID) {}
+
+ bool runOnModule(Module &M) override { return canonicalizeAliases(M); }
+};
+char CanonicalizeAliasesLegacyPass::ID = 0;
+
+} // anonymous namespace
+
+PreservedAnalyses CanonicalizeAliasesPass::run(Module &M,
+ ModuleAnalysisManager &AM) {
+ if (!canonicalizeAliases(M))
+ return PreservedAnalyses::all();
+
+ return PreservedAnalyses::none();
+}
+
+INITIALIZE_PASS_BEGIN(CanonicalizeAliasesLegacyPass, "canonicalize-aliases",
+ "Canonicalize aliases", false, false)
+INITIALIZE_PASS_END(CanonicalizeAliasesLegacyPass, "canonicalize-aliases",
+ "Canonicalize aliases", false, false)
+
+namespace llvm {
+ModulePass *createCanonicalizeAliasesPass() {
+ return new CanonicalizeAliasesLegacyPass();
+}
+} // namespace llvm