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62 lines
2.3 KiB
LLVM
62 lines
2.3 KiB
LLVM
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; RUN: opt -disable-verify -passes='default<O2>' -S < %s | FileCheck %s
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; The local array %tmp can only be optimized away by sroa after loop unroll.
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; CHECK-LABEL: define void @foo
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; CHECK-NOT: alloca
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; CHECK-NOT: call void @llvm.memcpy.p0i8.p0i8.i64
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; Function Attrs: nounwind uwtable
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define void @foo(i32* %a, i32* %b) {
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entry:
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%a.addr = alloca i32*, align 8
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%b.addr = alloca i32*, align 8
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%tmp = alloca [4 x float], align 16
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%i = alloca i32, align 4
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store i32* %a, i32** %a.addr, align 8
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store i32* %b, i32** %b.addr, align 8
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store i32 0, i32* %i, align 4
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br label %for.cond
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for.cond: ; preds = %for.inc, %entry
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%iter2 = load i32, i32* %i, align 4
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%cmp = icmp slt i32 %iter2, 4
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br i1 %cmp, label %for.body, label %for.cond.cleanup
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for.cond.cleanup: ; preds = %for.cond
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br label %for.end
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for.body: ; preds = %for.cond
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%inptr = load i32*, i32** %a.addr, align 8
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%idx2 = load i32, i32* %i, align 4
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%idxprom = sext i32 %idx2 to i64
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%arrayidx = getelementptr inbounds i32, i32* %inptr, i64 %idxprom
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%val = load i32, i32* %arrayidx, align 4
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%conv = sitofp i32 %val to float
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%idx = load i32, i32* %i, align 4
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%idxprom1 = sext i32 %idx to i64
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%arrayidx2 = getelementptr inbounds [4 x float], [4 x float]* %tmp, i64 0, i64 %idxprom1
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store float %conv, float* %arrayidx2, align 4
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br label %for.inc
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for.inc: ; preds = %for.body
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%iter = load i32, i32* %i, align 4
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%inc = add nsw i32 %iter, 1
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store i32 %inc, i32* %i, align 4
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br label %for.cond
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for.end: ; preds = %for.cond.cleanup
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%dstptr = load i32*, i32** %b.addr, align 8
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%dst = bitcast i32* %dstptr to i8*
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%arraydecay = getelementptr inbounds [4 x float], [4 x float]* %tmp, i64 0, i64 0
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%src = bitcast float* %arraydecay to i8*
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %dst, i8* align 16 %src, i64 16, i1 false)
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ret void
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}
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; Function Attrs: argmemonly nounwind willreturn
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg)
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