fix a crash building SPASS by tolerating a callsite that doesn't exist

in the callgraph, see the big comment at the top of the testcase.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80541 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/Inline/crash.ll

@@ -0,0 +1,57 @@
+; RUN: llvm-as < %s | opt -inline -argpromotion -instcombine -disable-output
+
+; This test was failing because the inliner would inline @list_DeleteElement
+; into @list_DeleteDuplicates and then into @inf_GetBackwardPartnerLits,
+; turning the indirect call into a direct one.  This allowed instcombine to see
+; the bitcast and eliminate it, deleting the original call and introducing
+; another one.  This crashed the inliner because the new call was not in the
+; callgraph.
+
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
+target triple = "i386-apple-darwin10.0"
+
+
+define void @list_DeleteElement(i32 (i8*, i8*)* nocapture %Test) nounwind ssp {
+entry:
+  %0 = call i32 %Test(i8* null, i8* undef) nounwind
+  ret void
+}
+
+
+define void @list_DeleteDuplicates(i32 (i8*, i8*)* nocapture %Test) nounwind ssp {
+foo:
+  call void @list_DeleteElement(i32 (i8*, i8*)* %Test) nounwind ssp 
+  call fastcc void @list_Rplacd1284() nounwind ssp
+  unreachable
+
+}
+
+define internal i32 @inf_LiteralsHaveSameSubtermAndAreFromSameClause(i32* nocapture %L1, i32* nocapture %L2) nounwind readonly ssp {
+entry:
+  unreachable
+}
+
+
+define internal fastcc void @inf_GetBackwardPartnerLits(i32* nocapture %Flags) nounwind ssp {
+test:
+  call void @list_DeleteDuplicates(i32 (i8*, i8*)* bitcast (i32 (i32*, i32*)* @inf_LiteralsHaveSameSubtermAndAreFromSameClause to i32 (i8*, i8*)*)) nounwind 
+  ret void
+}
+
+
+define void @inf_BackwardEmptySortPlusPlus() nounwind ssp {
+entry:
+  call fastcc void @inf_GetBackwardPartnerLits(i32* null) nounwind ssp
+  unreachable
+}
+
+define void @inf_BackwardWeakening() nounwind ssp {
+entry:
+  call fastcc void @inf_GetBackwardPartnerLits(i32* null) nounwind ssp
+  unreachable
+}
+
+
+
+
+declare fastcc void @list_Rplacd1284() nounwind ssp