llvm-6502/test/Transforms/GVN/load-constant-mem.ll

; RUN: opt < %s -gvn -instcombine -S | grep {ret i32 0}
; PR4189
@G = external constant [4 x i32]

define i32 @test(i8* %p, i32 %i) nounwind {
entry:
	%P = getelementptr [4 x i32]* @G, i32 0, i32 %i
	%A = load i32* %P
	store i8 4, i8* %p
	%B = load i32* %P
	%C = sub i32 %A, %B
	ret i32 %C
}
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 -gvn -instcombine -S \| grep {ret i32 0}`
make memdep use the getModRefInfo method for stores instead of the low-level alias() method, allowing it to reason more aggressively about pointers into constant memory. PR4189 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72403 91177308-0d34-0410-b5e6-96231b3b80d8 2009-05-25 21:28:56 +00:00			`; PR4189`
			`@G = external constant [4 x i32]`

			`define i32 @test(i8* %p, i32 %i) nounwind {`
			`entry:`
			`%P = getelementptr [4 x i32]* @G, i32 0, i32 %i`
			`%A = load i32* %P`
			`store i8 4, i8* %p`
			`%B = load i32* %P`
			`%C = sub i32 %A, %B`
			`ret i32 %C`
			`}`