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1; RUN: opt -disable-verify -passes='default<O2>' -S < %s | FileCheck %s2 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 @foo9; CHECK-NOT: alloca10; CHECK-NOT: call void @llvm.memcpy.p0.p0.i6411 12; Function Attrs: nounwind uwtable13define void @foo(ptr %a, ptr %b) {14entry:15 %a.addr = alloca ptr, align 816 %b.addr = alloca ptr, align 817 %tmp = alloca [4 x float], align 1618 %i = alloca i32, align 419 store ptr %a, ptr %a.addr, align 820 store ptr %b, ptr %b.addr, align 821 store i32 0, ptr %i, align 422 br label %for.cond23 24for.cond: ; preds = %for.inc, %entry25 %iter2 = load i32, ptr %i, align 426 %cmp = icmp slt i32 %iter2, 427 br i1 %cmp, label %for.body, label %for.cond.cleanup28 29for.cond.cleanup: ; preds = %for.cond30 br label %for.end31 32for.body: ; preds = %for.cond33 %inptr = load ptr, ptr %a.addr, align 834 %idx2 = load i32, ptr %i, align 435 %idxprom = sext i32 %idx2 to i6436 %arrayidx = getelementptr inbounds i32, ptr %inptr, i64 %idxprom37 %val = load i32, ptr %arrayidx, align 438 %conv = sitofp i32 %val to float39 %idx = load i32, ptr %i, align 440 %idxprom1 = sext i32 %idx to i6441 %arrayidx2 = getelementptr inbounds [4 x float], ptr %tmp, i64 0, i64 %idxprom142 store float %conv, ptr %arrayidx2, align 443 br label %for.inc44 45for.inc: ; preds = %for.body46 %iter = load i32, ptr %i, align 447 %inc = add nsw i32 %iter, 148 store i32 %inc, ptr %i, align 449 br label %for.cond50 51for.end: ; preds = %for.cond.cleanup52 %dstptr = load ptr, ptr %b.addr, align 853 call void @llvm.memcpy.p0.p0.i64(ptr align 4 %dstptr, ptr align 16 %tmp, i64 16, i1 false)54 ret void55}56 57; Function Attrs: argmemonly nounwind willreturn58declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg)59