1; RUN: opt -disable-verify -passes='default<O2>' -S < %s | FileCheck %s 2 3target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 4target triple = "x86_64-unknown-linux-gnu" 5 6; The local array %tmp can only be optimized away by sroa after loop unroll. 7 8; CHECK-LABEL: define void @foo 9; CHECK-NOT: alloca 10; CHECK-NOT: call void @llvm.memcpy.p0.p0.i64 11 12; Function Attrs: nounwind uwtable 13define void @foo(ptr %a, ptr %b) { 14entry: 15 %a.addr = alloca ptr, align 8 16 %b.addr = alloca ptr, align 8 17 %tmp = alloca [4 x float], align 16 18 %i = alloca i32, align 4 19 store ptr %a, ptr %a.addr, align 8 20 store ptr %b, ptr %b.addr, align 8 21 store i32 0, ptr %i, align 4 22 br label %for.cond 23 24for.cond: ; preds = %for.inc, %entry 25 %iter2 = load i32, ptr %i, align 4 26 %cmp = icmp slt i32 %iter2, 4 27 br i1 %cmp, label %for.body, label %for.cond.cleanup 28 29for.cond.cleanup: ; preds = %for.cond 30 br label %for.end 31 32for.body: ; preds = %for.cond 33 %inptr = load ptr, ptr %a.addr, align 8 34 %idx2 = load i32, ptr %i, align 4 35 %idxprom = sext i32 %idx2 to i64 36 %arrayidx = getelementptr inbounds i32, ptr %inptr, i64 %idxprom 37 %val = load i32, ptr %arrayidx, align 4 38 %conv = sitofp i32 %val to float 39 %idx = load i32, ptr %i, align 4 40 %idxprom1 = sext i32 %idx to i64 41 %arrayidx2 = getelementptr inbounds [4 x float], ptr %tmp, i64 0, i64 %idxprom1 42 store float %conv, ptr %arrayidx2, align 4 43 br label %for.inc 44 45for.inc: ; preds = %for.body 46 %iter = load i32, ptr %i, align 4 47 %inc = add nsw i32 %iter, 1 48 store i32 %inc, ptr %i, align 4 49 br label %for.cond 50 51for.end: ; preds = %for.cond.cleanup 52 %dstptr = load ptr, ptr %b.addr, align 8 53 call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dstptr, ptr align 16 %tmp, i64 16, i1 false) 54 ret void 55} 56 57; Function Attrs: argmemonly nounwind willreturn 58declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) 59