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[SCEV] add testcase for get accurate range for addrecexpr with nuw flag

This commit is contained in:
czhengsz 2019-12-22 20:58:19 -05:00
parent 2539cd22e9
commit 7259f04dde
1 changed files with 20 additions and 0 deletions
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20
llvm/test/Analysis/ScalarEvolution/range_nw_flag.ll
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@ -19,3 +19,23 @@ exit:
ret void
}
; CHECK-LABEL: @test-addrec-nuw
; CHECK: --> {(1 + (10 smax %offset))<nuw>,+,1}<nuw><%loop> U: full-set S: full-set
define void @test-addrec-nuw(float* %input, i32 %offset, i32 %numIterations) {
entry:
%cmp = icmp sgt i32 %offset, 10
%min.10 = select i1 %cmp, i32 %offset, i32 10
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
%nexti = add nuw i32 %i, 1
%index32 = add nuw i32 %nexti, %min.10
%ptr = getelementptr inbounds float, float* %input, i32 %index32
%f = load float, float* %ptr, align 4
%exitcond = icmp eq i32 %nexti, %numIterations
br i1 %exitcond, label %exit, label %loop
exit:
ret void
}