llvm-6502/test/Analysis/BasicAA/2008-12-09-GEP-IndicesAlias.ll

; RUN: opt < %s -aa-eval -print-all-alias-modref-info -disable-output |& grep {MustAlias:.*%R,.*%r}
; Make sure that basicaa thinks R and r are must aliases.

define i32 @test(i8 * %P) {
entry:
	%Q = bitcast i8* %P to {i32, i32}*
	%R = getelementptr {i32, i32}* %Q, i32 0, i32 1
	%S = load i32* %R

	%q = bitcast i8* %P to {i32, i32}*
	%r = getelementptr {i32, i32}* %q, i32 0, i32 1
	%s = load i32* %r

	%t = sub i32 %S, %s
	ret i32 %t
}
Change tests from "opt %s" to "opt < %s" so that opt doesn't see the input filename so that opt doesn't print the input filename in the output so that grep lines in the tests don't unintentionally match strings in the input filename. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81537 91177308-0d34-0410-b5e6-96231b3b80d8 2009-09-11 18:01:28 +00:00			`; RUN: opt < %s -aa-eval -print-all-alias-modref-info -disable-output \|& grep {MustAlias:.%R,.%r}`
Allow basicaa to walk through geps with identical indices in parallel, allowing it to decide that P/Q must alias if A/B must alias in things like: P = gep A, 0, i, 1 Q = gep B, 0, i, 1 This allows GVN to delete 62 more instructions out of 403.gcc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60820 91177308-0d34-0410-b5e6-96231b3b80d8 2008-12-10 01:04:47 +00:00			`; Make sure that basicaa thinks R and r are must aliases.`

			`define i32 @test(i8 * %P) {`
			`entry:`
			`%Q = bitcast i8* %P to {i32, i32}*`
			`%R = getelementptr {i32, i32}* %Q, i32 0, i32 1`
			`%S = load i32* %R`

			`%q = bitcast i8* %P to {i32, i32}*`
			`%r = getelementptr {i32, i32}* %q, i32 0, i32 1`
			`%s = load i32* %r`

			`%t = sub i32 %S, %s`
			`ret i32 %t`
			`}`