Make BasicAliasAnalysis a normal AliasAnalysis implementation which

does normal initialization and normal chaining. Change the default
AliasAnalysis implementation to NoAlias.

Update StandardCompileOpts.h and friends to explicitly request
BasicAliasAnalysis.

Update tests to explicitly request -basicaa.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116720 91177308-0d34-0410-b5e6-96231b3b80d8

test/Analysis/GlobalsModRef/aliastest.ll

@@ -1,4 +1,4 @@
-; RUN: opt < %s -globalsmodref-aa -gvn -S | not grep load
+; RUN: opt < %s -basicaa -globalsmodref-aa -gvn -S | not grep load
 @X = internal global i32 4		; <i32*> [#uses=1]
 
 define i32 @test(i32* %P) {

test/Analysis/GlobalsModRef/chaining-analysis.ll

@@ -1,4 +1,4 @@
-; RUN: opt < %s -globalsmodref-aa -gvn -S | not grep load
+; RUN: opt < %s -basicaa -globalsmodref-aa -gvn -S | not grep load
 
 ; This test requires the use of previous analyses to determine that
 ; doesnotmodX does not modify X (because 'sin' doesn't).

test/Analysis/GlobalsModRef/indirect-global.ll

@@ -1,4 +1,4 @@
-; RUN: opt < %s -globalsmodref-aa -gvn -instcombine -S | \
+; RUN: opt < %s -basicaa -globalsmodref-aa -gvn -instcombine -S | \
 ; RUN:   grep {ret i32 0}
 
 @G = internal global i32* null		; <i32**> [#uses=3]

test/Analysis/GlobalsModRef/modreftest.ll

@@ -1,4 +1,4 @@
-; RUN: opt < %s -globalsmodref-aa -gvn -S | not grep load
+; RUN: opt < %s -basicaa -globalsmodref-aa -gvn -S | not grep load
 @X = internal global i32 4		; <i32*> [#uses=2]
 
 define i32 @test(i32* %P) {