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35 lines
1.0 KiB
LLVM
35 lines
1.0 KiB
LLVM
; RUN: opt -S -licm -enable-mssa-loop-dependency=true %s | FileCheck %s
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@v_1 = global i8 0, align 1
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@v_2 = global i8 0, align 1
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; CHECK-LABEL: @foo()
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; CHECK: for.cond:
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; CHECK-NOT: store
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; CHECK: for.body:
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; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
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; CHECK: store
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define void @foo() {
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entry:
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br label %for.cond
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for.cond: ; preds = %for.body, %entry
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%0 = phi i16 [ %inc, %for.body ], [ 0, %entry ]
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%cmp = icmp slt i16 %0, 1
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br i1 %cmp, label %for.body, label %for.end
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for.body: ; preds = %for.cond
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* @v_1, i8 * @v_2, i64 1, i1 false)
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store i8 1, i8 * @v_2, align 1
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%inc = add nsw i16 %0, 1
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br label %for.cond
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for.end: ; preds = %for.cond
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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) #2
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attributes #2 = { argmemonly nounwind willreturn }
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