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Add another test for the GlobalOpt change in r212079. 

This is a test that Akira Hatanaka wrote to test GlobalOpt's handling of
aliases with GEP operands. David Majnemer independently made the same
change to GlobalOpt in r212079. Akira's test is a useful addition, so I'm
pulling it over from the llvm repo for Swift on GitHub.

llvm-svn: 262510
This commit is contained in:
Bob Wilson 2016-03-02 20:02:25 +00:00
parent 721f61a00e
commit 9ab86aabba
1 changed files with 19 additions and 0 deletions
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19
llvm/test/Transforms/GlobalOpt/alias-used.ll
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@ -45,3 +45,22 @@ define i8* @g2() {
define i8* @h() {
ret i8* @ca
}
; Check that GlobalOpt doesn't try to resolve aliases with GEP operands.
%struct.S = type { i32, i32, i32 }
@s = global %struct.S { i32 1, i32 2, i32 3 }, align 4
@alias1 = alias i32, i32* getelementptr inbounds (%struct.S, %struct.S* @s, i64 0, i32 1)
@alias2 = alias i32, i32* getelementptr inbounds (%struct.S, %struct.S* @s, i64 0, i32 2)
; CHECK: load i32, i32* @alias1, align 4
; CHECK: load i32, i32* @alias2, align 4
define i32 @foo1() {
entry:
%0 = load i32, i32* @alias1, align 4
%1 = load i32, i32* @alias2, align 4
%add = add nsw i32 %1, %0
ret i32 %add
}