forked from OSchip/llvm-project
48 lines
1.6 KiB
LLVM
48 lines
1.6 KiB
LLVM
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; RUN: opt -basicaa -loop-idiom < %s -S | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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target triple = "x86_64-apple-darwin10.0.0"
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; CHECK: @memset
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; CHECK-NOT: callq _memset
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define i8* @memset(i8* %b, i32 %c, i64 %len) nounwind uwtable ssp {
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entry:
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%b.addr = alloca i8*, align 8
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%c.addr = alloca i32, align 4
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%len.addr = alloca i64, align 8
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%p = alloca i8*, align 8
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%i = alloca i32, align 4
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store i8* %b, i8** %b.addr, align 8
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store i32 %c, i32* %c.addr, align 4
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store i64 %len, i64* %len.addr, align 8
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%tmp = load i8** %b.addr, align 8
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store i8* %tmp, i8** %p, 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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%tmp2 = load i32* %i, align 4
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%conv = sext i32 %tmp2 to i64
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%tmp3 = load i64* %len.addr, align 8
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%cmp = icmp ult i64 %conv, %tmp3
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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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%tmp5 = load i32* %c.addr, align 4
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%conv6 = trunc i32 %tmp5 to i8
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%tmp7 = load i8** %p, align 8
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%incdec.ptr = getelementptr inbounds i8* %tmp7, i32 1
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store i8* %incdec.ptr, i8** %p, align 8
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store i8 %conv6, i8* %tmp7
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br label %for.inc
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for.inc: ; preds = %for.body
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%tmp8 = load i32* %i, align 4
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%inc = add nsw i32 %tmp8, 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
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%tmp9 = load i8** %b.addr, align 8
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ret i8* %tmp9
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}
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