[llvm-commits] [llvm] r44626 - in /llvm/trunk/lib: Analysis/AliasAnalysis.cpp VMCore/Instruction.cpp

[Duncan Sands]

Author: baldrick
Date: Wed Dec  5 15:03:28 2007
New Revision: 44626

URL: http://llvm.org/viewvc/llvm-project?rev=44626&view=rev
Log:
Commit 44487 broke bootstrap of llvm-gcc-4.2.  It is
not yet clear why, but in the meantime work around the
problem by making less use of readnone/readonly info.

Modified:
    llvm/trunk/lib/Analysis/AliasAnalysis.cpp
    llvm/trunk/lib/VMCore/Instruction.cpp

Modified: llvm/trunk/lib/Analysis/AliasAnalysis.cpp
URL: 
http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/AliasAnalysis.cpp?rev=44626&r1=44625&r2=44626&view=diff

==============================================================================
--- llvm/trunk/lib/Analysis/AliasAnalysis.cpp (original)
+++ llvm/trunk/lib/Analysis/AliasAnalysis.cpp Wed Dec  5 15:03:28 2007
@@ -116,13 +116,17 @@
 AliasAnalysis::ModRefBehavior
 AliasAnalysis::getModRefBehavior(CallSite CS,
                                  std::vector<PointerAccessInfo> *Info) {
-  if (CS.doesNotAccessMemory())
+  if (CS.doesNotAccessMemory() &&
+      // FIXME: workaround gcc bootstrap breakage
+      CS.getCalledFunction() && CS.getCalledFunction()->isDeclaration())
     // Can't do better than this.
     return DoesNotAccessMemory;
   ModRefBehavior MRB = UnknownModRefBehavior;
   if (Function *F = CS.getCalledFunction())
     MRB = getModRefBehavior(F, CS, Info);
-  if (MRB != DoesNotAccessMemory && CS.onlyReadsMemory())
+  if (MRB != DoesNotAccessMemory && CS.onlyReadsMemory() &&
+      // FIXME: workaround gcc bootstrap breakage
+      CS.getCalledFunction() && CS.getCalledFunction()->isDeclaration())
     return OnlyReadsMemory;
   return MRB;
 }
@@ -130,11 +134,15 @@
 AliasAnalysis::ModRefBehavior
 AliasAnalysis::getModRefBehavior(Function *F,
                                  std::vector<PointerAccessInfo> *Info) {
-  if (F->doesNotAccessMemory())
+  if (F->doesNotAccessMemory() &&
+      // FIXME: workaround gcc bootstrap breakage
+      F->isDeclaration())
     // Can't do better than this.
     return DoesNotAccessMemory;
   ModRefBehavior MRB = getModRefBehavior(F, CallSite(), Info);
-  if (MRB != DoesNotAccessMemory && F->onlyReadsMemory())
+  if (MRB != DoesNotAccessMemory && F->onlyReadsMemory() &&
+      // FIXME: workaround gcc bootstrap breakage
+      F->isDeclaration())
     return OnlyReadsMemory;
   return MRB;
 }

Modified: llvm/trunk/lib/VMCore/Instruction.cpp
URL: 
http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/VMCore/Instruction.cpp?rev=44626&r1=44625&r2=44626&view=diff

==============================================================================
--- llvm/trunk/lib/VMCore/Instruction.cpp (original)
+++ llvm/trunk/lib/VMCore/Instruction.cpp Wed Dec  5 15:03:28 2007
@@ -13,6 +13,7 @@
 
 #include "llvm/Type.h"
 #include "llvm/Instructions.h"
+#include "llvm/IntrinsicInst.h" // FIXME: remove
 #include "llvm/Function.h"
 #include "llvm/Support/CallSite.h"
 #include "llvm/Support/LeakDetector.h"
@@ -208,6 +209,8 @@
   case Instruction::VAArg:
     return true;
   case Instruction::Call:
+    if (!isa<IntrinsicInst>(this))
+      return true; // FIXME: workaround gcc bootstrap breakage
     return !cast<CallInst>(this)->onlyReadsMemory();
   case Instruction::Load:
     return cast<LoadInst>(this)->isVolatile();


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