llvm-mirror/test/Analysis/BasicAA/global-size.ll
2008-08-16 00:00:54 +00:00

16 lines
479 B
LLVM

; A store or load cannot alias a global if the accessed amount is larger then
; the global.
; RUN: llvm-as < %s | opt -basicaa -gvn -instcombine | llvm-dis | not grep load
@B = global i16 8 ; <i16*> [#uses=2]
define i16 @test(i32* %P) {
%X = load i16* @B ; <i16> [#uses=1]
store i32 7, i32* %P
%Y = load i16* @B ; <i16> [#uses=1]
%Z = sub i16 %Y, %X ; <i16> [#uses=1]
ret i16 %Z
}