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944814b41a
After a lot of discussion, we realized it's not the best option for run-time bounds checking llvm-svn: 157255
56 lines
2.6 KiB
LLVM
56 lines
2.6 KiB
LLVM
; RUN: llc -O0 < %s -march=x86-64 | FileCheck %s -check-prefix=X64
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; ModuleID = 'ts.c'
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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"
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@p = common global i8* null, align 8 ; <i8**> [#uses=4]
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@.str = private constant [3 x i8] c"Hi\00" ; <[3 x i8]*> [#uses=1]
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define void @bar() nounwind ssp {
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entry:
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%tmp = load i8** @p ; <i8*> [#uses=1]
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%0 = call i64 @llvm.objectsize.i64(i8* %tmp, i1 0) ; <i64> [#uses=1]
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%cmp = icmp ne i64 %0, -1 ; <i1> [#uses=1]
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; X64: movabsq $-1, [[RAX:%r..]]
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; X64: cmpq $-1, [[RAX]]
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br i1 %cmp, label %cond.true, label %cond.false
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cond.true: ; preds = %entry
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%tmp1 = load i8** @p ; <i8*> [#uses=1]
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%tmp2 = load i8** @p ; <i8*> [#uses=1]
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%1 = call i64 @llvm.objectsize.i64(i8* %tmp2, i1 1) ; <i64> [#uses=1]
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%call = call i8* @__strcpy_chk(i8* %tmp1, i8* getelementptr inbounds ([3 x i8]* @.str, i32 0, i32 0), i64 %1) ssp ; <i8*> [#uses=1]
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br label %cond.end
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cond.false: ; preds = %entry
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%tmp3 = load i8** @p ; <i8*> [#uses=1]
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%call4 = call i8* @__inline_strcpy_chk(i8* %tmp3, i8* getelementptr inbounds ([3 x i8]* @.str, i32 0, i32 0)) ssp ; <i8*> [#uses=1]
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br label %cond.end
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cond.end: ; preds = %cond.false, %cond.true
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%cond = phi i8* [ %call, %cond.true ], [ %call4, %cond.false ] ; <i8*> [#uses=0]
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ret void
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}
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declare i64 @llvm.objectsize.i64(i8*, i1) nounwind readonly
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declare i8* @__strcpy_chk(i8*, i8*, i64) ssp
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define internal i8* @__inline_strcpy_chk(i8* %__dest, i8* %__src) nounwind ssp {
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entry:
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%retval = alloca i8* ; <i8**> [#uses=2]
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%__dest.addr = alloca i8* ; <i8**> [#uses=3]
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%__src.addr = alloca i8* ; <i8**> [#uses=2]
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store i8* %__dest, i8** %__dest.addr
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store i8* %__src, i8** %__src.addr
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%tmp = load i8** %__dest.addr ; <i8*> [#uses=1]
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%tmp1 = load i8** %__src.addr ; <i8*> [#uses=1]
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%tmp2 = load i8** %__dest.addr ; <i8*> [#uses=1]
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%0 = call i64 @llvm.objectsize.i64(i8* %tmp2, i1 1) ; <i64> [#uses=1]
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%call = call i8* @__strcpy_chk(i8* %tmp, i8* %tmp1, i64 %0) ssp ; <i8*> [#uses=1]
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store i8* %call, i8** %retval
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%1 = load i8** %retval ; <i8*> [#uses=1]
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ret i8* %1
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}
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