124 lines
3.7 KiB
LLVM
124 lines
3.7 KiB
LLVM
; RUN: opt -codegenprepare -S < %s | FileCheck %s
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; Ensure we act sanely on overflow.
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; CHECK-LABEL: define i32 @bar
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define i32 @bar() {
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entry:
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; CHECK: ret i32 -1
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%az = alloca [2147483649 x i32], align 16
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%a = alloca i8*, align 8
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%arraydecay = getelementptr inbounds [2147483649 x i32], [2147483649 x i32]* %az, i32 0, i32 0
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%0 = bitcast i32* %arraydecay to i8*
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store i8* %0, i8** %a, align 8
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%1 = load i8*, i8** %a, align 8
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%2 = call i32 @llvm.objectsize.i32.p0i8(i8* %1, i1 false)
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ret i32 %2
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}
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; CHECK-LABEL: define i32 @baz
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define i32 @baz(i32 %n) {
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entry:
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; CHECK: ret i32 -1
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%az = alloca [1 x i32], align 16
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%bz = alloca [4294967297 x i32], align 16
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%tobool = icmp ne i32 %n, 0
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%arraydecay = getelementptr inbounds [1 x i32], [1 x i32]* %az, i64 0, i64 0
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%arraydecay1 = getelementptr inbounds [4294967297 x i32], [4294967297 x i32]* %bz, i64 0, i64 0
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%cond = select i1 %tobool, i32* %arraydecay, i32* %arraydecay1
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%0 = bitcast i32* %cond to i8*
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%1 = call i32 @llvm.objectsize.i32.p0i8(i8* %0, i1 false)
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ret i32 %1
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}
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declare i32 @llvm.objectsize.i32.p0i8(i8*, i1)
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; The following tests were generated by:
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; #include<stdlib.h>
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; #define STATIC_BUF_SIZE 10
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; #define LARGER_BUF_SIZE 30
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;
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; size_t foo1(int flag) {
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; char *cptr;
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; char chararray[LARGER_BUF_SIZE];
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; char chararray2[STATIC_BUF_SIZE];
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; if(flag)
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; cptr = chararray2;
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; else
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; cptr = chararray;
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;
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; return __builtin_object_size(cptr, 2);
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; }
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;
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; size_t foo2(int n) {
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; char Small[10];
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; char Large[20];
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; char *Ptr = n ? Small : Large + 19;
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; return __builtin_object_size(Ptr, 0);
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; }
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;
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; void foo() {
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; size_t ret;
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; size_t ret1;
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; ret = foo1(0);
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; ret1 = foo2(0);
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; printf("\n%d %d\n", ret, ret1);
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; }
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@.str = private unnamed_addr constant [8 x i8] c"\0A%d %d\0A\00", align 1
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define i64 @foo1(i32 %flag) {
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entry:
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%chararray = alloca [30 x i8], align 16
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%chararray2 = alloca [10 x i8], align 1
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%0 = getelementptr inbounds [30 x i8], [30 x i8]* %chararray, i64 0, i64 0
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call void @llvm.lifetime.start.p0i8(i64 30, i8* %0)
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%1 = getelementptr inbounds [10 x i8], [10 x i8]* %chararray2, i64 0, i64 0
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call void @llvm.lifetime.start.p0i8(i64 10, i8* %1)
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%tobool = icmp eq i32 %flag, 0
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%cptr.0 = select i1 %tobool, i8* %0, i8* %1
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%2 = call i64 @llvm.objectsize.i64.p0i8(i8* %cptr.0, i1 true)
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call void @llvm.lifetime.end.p0i8(i64 10, i8* %1)
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call void @llvm.lifetime.end.p0i8(i64 30, i8* %0)
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ret i64 %2
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; CHECK-LABEL: foo1
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; CHECK: ret i64 10
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}
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declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture)
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declare i64 @llvm.objectsize.i64.p0i8(i8*, i1)
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declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture)
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define i64 @foo2(i32 %n) {
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entry:
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%Small = alloca [10 x i8], align 1
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%Large = alloca [20 x i8], align 16
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%0 = getelementptr inbounds [10 x i8], [10 x i8]* %Small, i64 0, i64 0
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call void @llvm.lifetime.start.p0i8(i64 10, i8* %0)
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%1 = getelementptr inbounds [20 x i8], [20 x i8]* %Large, i64 0, i64 0
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call void @llvm.lifetime.start.p0i8(i64 20, i8* %1)
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%tobool = icmp ne i32 %n, 0
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%add.ptr = getelementptr inbounds [20 x i8], [20 x i8]* %Large, i64 0, i64 19
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%cond = select i1 %tobool, i8* %0, i8* %add.ptr
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%2 = call i64 @llvm.objectsize.i64.p0i8(i8* %cond, i1 false)
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call void @llvm.lifetime.end.p0i8(i64 20, i8* %1)
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call void @llvm.lifetime.end.p0i8(i64 10, i8* %0)
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ret i64 %2
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; CHECK-LABEL: foo2
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; CHECK: ret i64 10
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}
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define void @foo() {
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entry:
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%call = tail call i64 @foo1(i32 0)
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%call1 = tail call i64 @foo2(i32 0)
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%call2 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i64 %call, i64 %call1)
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ret void
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}
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declare i32 @printf(i8* nocapture readonly, ...)
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