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llvm-6502/test/Transforms/Sink/basic.ll
Dan Gohman c1be92f3bb 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
2010-10-18 18:04:47 +00:00

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LLVM

; RUN: opt < %s -basicaa -sink -S | FileCheck %s
@A = external global i32
@B = external global i32
; Sink should sink the load past the store (which doesn't overlap) into
; the block that uses it.
; CHECK: @foo
; CHECK: true:
; CHECK-NEXT: %l = load i32* @A
; CHECK-NEXT: ret i32 %l
define i32 @foo(i1 %z) {
%l = load i32* @A
store i32 0, i32* @B
br i1 %z, label %true, label %false
true:
ret i32 %l
false:
ret i32 0
}