From 547d824da661fedaeeda3a4bcb83a3464fa1b7b9 Mon Sep 17 00:00:00 2001
From: Krasimir Georgiev <krasimir@google.com>
Date: Tue, 16 Oct 2018 18:50:09 +0000
Subject: Revert "[WebAssembly] LSDA info generation"

This reverts commit r344575.
Newly introduced test eh-lsda.ll.test fails with use-after-free under
ASAN build.

llvm-svn: 344639
---
 llvm/lib/CodeGen/MachineFunction.cpp | 45 ++++++++++++++++--------------------
 1 file changed, 20 insertions(+), 25 deletions(-)

(limited to 'llvm/lib/CodeGen/MachineFunction.cpp')

diff --git a/llvm/lib/CodeGen/MachineFunction.cpp b/llvm/lib/CodeGen/MachineFunction.cpp
index 9e4963c4bdb..431484f078b 100644
--- a/llvm/lib/CodeGen/MachineFunction.cpp
+++ b/llvm/lib/CodeGen/MachineFunction.cpp
@@ -661,11 +661,8 @@ MCSymbol *MachineFunction::addLandingPad(MachineBasicBlock *LandingPad) {
       }
     }
 
-  } else if (const auto *CPI = dyn_cast<CatchPadInst>(FirstI)) {
-    for (unsigned I = CPI->getNumArgOperands(); I != 0; --I) {
-      Value *TypeInfo = CPI->getArgOperand(I - 1)->stripPointerCasts();
-      addCatchTypeInfo(LandingPad, dyn_cast<GlobalValue>(TypeInfo));
-    }
+  } else if (isa<CatchPadInst>(FirstI)) {
+    // TODO
 
   } else {
     assert(isa<CleanupPadInst>(FirstI) && "Invalid landingpad!");
@@ -690,8 +687,7 @@ void MachineFunction::addFilterTypeInfo(MachineBasicBlock *LandingPad,
   LP.TypeIds.push_back(getFilterIDFor(IdsInFilter));
 }
 
-void MachineFunction::tidyLandingPads(DenseMap<MCSymbol *, uintptr_t> *LPMap,
-                                      bool TidyIfNoBeginLabels) {
+void MachineFunction::tidyLandingPads(DenseMap<MCSymbol*, uintptr_t> *LPMap) {
   for (unsigned i = 0; i != LandingPads.size(); ) {
     LandingPadInfo &LandingPad = LandingPads[i];
     if (LandingPad.LandingPadLabel &&
@@ -706,25 +702,24 @@ void MachineFunction::tidyLandingPads(DenseMap<MCSymbol *, uintptr_t> *LPMap,
       continue;
     }
 
-    if (TidyIfNoBeginLabels) {
-      for (unsigned j = 0, e = LandingPads[i].BeginLabels.size(); j != e; ++j) {
-        MCSymbol *BeginLabel = LandingPad.BeginLabels[j];
-        MCSymbol *EndLabel = LandingPad.EndLabels[j];
-        if ((BeginLabel->isDefined() || (LPMap && (*LPMap)[BeginLabel] != 0)) &&
-            (EndLabel->isDefined() || (LPMap && (*LPMap)[EndLabel] != 0)))
-          continue;
-
-        LandingPad.BeginLabels.erase(LandingPad.BeginLabels.begin() + j);
-        LandingPad.EndLabels.erase(LandingPad.EndLabels.begin() + j);
-        --j;
-        --e;
-      }
+    for (unsigned j = 0, e = LandingPads[i].BeginLabels.size(); j != e; ++j) {
+      MCSymbol *BeginLabel = LandingPad.BeginLabels[j];
+      MCSymbol *EndLabel = LandingPad.EndLabels[j];
+      if ((BeginLabel->isDefined() ||
+           (LPMap && (*LPMap)[BeginLabel] != 0)) &&
+          (EndLabel->isDefined() ||
+           (LPMap && (*LPMap)[EndLabel] != 0))) continue;
+
+      LandingPad.BeginLabels.erase(LandingPad.BeginLabels.begin() + j);
+      LandingPad.EndLabels.erase(LandingPad.EndLabels.begin() + j);
+      --j;
+      --e;
+    }
 
-      // Remove landing pads with no try-ranges.
-      if (LandingPads[i].BeginLabels.empty()) {
-        LandingPads.erase(LandingPads.begin() + i);
-        continue;
-      }
+    // Remove landing pads with no try-ranges.
+    if (LandingPads[i].BeginLabels.empty()) {
+      LandingPads.erase(LandingPads.begin() + i);
+      continue;
     }
 
     // If there is no landing pad, ensure that the list of typeids is empty.
-- 
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