1; RUN: opt -S -indvars < %s | FileCheck %s 2 3define void @test1(float* nocapture %autoc, float* nocapture %data, float %d, i32 %data_len, i32 %sample) nounwind { 4entry: 5 %sub = sub i32 %data_len, %sample 6 %cmp4 = icmp eq i32 %data_len, %sample 7 br i1 %cmp4, label %for.end, label %for.body 8 9for.body: ; preds = %entry, %for.body 10 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ] 11 %0 = trunc i64 %indvars.iv to i32 12 %add = add i32 %0, %sample 13 %idxprom = zext i32 %add to i64 14 %arrayidx = getelementptr inbounds float* %data, i64 %idxprom 15 %1 = load float* %arrayidx, align 4 16 %mul = fmul float %1, %d 17 %arrayidx2 = getelementptr inbounds float* %autoc, i64 %indvars.iv 18 %2 = load float* %arrayidx2, align 4 19 %add3 = fadd float %2, %mul 20 store float %add3, float* %arrayidx2, align 4 21 %indvars.iv.next = add i64 %indvars.iv, 1 22 %3 = trunc i64 %indvars.iv.next to i32 23 %cmp = icmp ult i32 %3, %sub 24 br i1 %cmp, label %for.body, label %for.end 25 26for.end: ; preds = %for.body, %entry 27 ret void 28 29; CHECK: @test1 30 31; First check that we move the sub into the preheader, it doesn't have to be 32; executed if %cmp4 == false 33; CHECK: for.body.preheader: 34; CHECK: sub i32 %data_len, %sample 35; CHECK: br label %for.body 36 37; Second, check that we turn the IV test into an eq. 38; CHECK: %lftr.wideiv = trunc i64 %indvars.iv.next to i32 39; CHECK: %exitcond = icmp ne i32 %lftr.wideiv, %0 40; CHECK: br i1 %exitcond, label %for.body, label %for.end.loopexit 41} 42 43