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range_nw_flag.ll
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range_nw_flag.ll
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; RUN: opt < %s -S -analyze -scalar-evolution | FileCheck %s
; copied from flags-from-poison.ll
; CHECK-LABEL: @test-add-nuw
; CHECK: --> {(1 + %offset)<nuw>,+,1}<nuw><%loop> U: full-set S: full-set
define void @test-add-nuw(float* %input, i32 %offset, i32 %numIterations) {
entry:
br label %loop
loop:
%i = phi i32 [ %nexti, %loop ], [ 0, %entry ]
%nexti = add nuw i32 %i, 1
%index32 = add nuw i32 %nexti, %offset
%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
}
; 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
}