Commit c529f005 authored by Tanya Lattner's avatar Tanya Lattner
Browse files

Merge r100936 from mainline to fix PR6760. 

llvm-svn: 101137
parent 2026b3fd

llvm/lib/Transforms/IPO/GlobalOpt.cpp

+2 −1
Original line number Diff line number Diff line
@@ -955,7 +955,8 @@ static bool ValueIsOnlyUsedLocallyOrStoredToOneGlobal(Instruction *V, 
      continue; // Otherwise, storing through it, or storing into GV... fine.

    }

    

    if (isa<GetElementPtrInst>(Inst)) {

    // Must index into the array and into the struct.

    if (isa<GetElementPtrInst>(Inst) && Inst->getNumOperands() >= 3) {

      if (!ValueIsOnlyUsedLocallyOrStoredToOneGlobal(Inst, GV, PHIs))

        return false;

      continue;

llvm/test/Transforms/GlobalOpt/crash.ll

+27 −1
Original line number Diff line number Diff line
@@ -14,3 +14,29 @@ entry: 
  store float 1.0, float* getelementptr inbounds (%struct.btSimdScalar* @_ZL6vTwist, i32 0, i32 0, i32 0, i32 3), align 4

  ret void

}





; PR6760

%T = type { [5 x i32] }



@switch_inf = internal global %T* null



define void @test(i8* %arch_file, i32 %route_type) {

entry:

  %A = sext i32 1 to i64

  %B = mul i64 %A, 20

  %C = call noalias i8* @malloc(i64 %B) nounwind

  %D = bitcast i8* %C to %T*

  store %T* %D, %T** @switch_inf, align 8

  unreachable



bb.nph.i: 

  %scevgep.i539 = getelementptr i8* %C, i64 4

  unreachable



xx:

  %E = load %T** @switch_inf, align 8 

  unreachable

}



declare noalias i8* @malloc(i64) nounwind