forked from OSchip/llvm-project
90 lines
2.6 KiB
LLVM
90 lines
2.6 KiB
LLVM
; RUN: opt -codegenprepare -S < %s | FileCheck %s
|
|
|
|
; #include<stdlib.h>
|
|
; #define STATIC_BUF_SIZE 10
|
|
; #define LARGER_BUF_SIZE 30
|
|
;
|
|
; size_t foo1(int flag) {
|
|
; char *cptr;
|
|
; char chararray[LARGER_BUF_SIZE];
|
|
; char chararray2[STATIC_BUF_SIZE];
|
|
; if(flag)
|
|
; cptr = chararray2;
|
|
; else
|
|
; cptr = chararray;
|
|
;
|
|
; return __builtin_object_size(cptr, 2);
|
|
; }
|
|
;
|
|
; size_t foo2(int n) {
|
|
; char Small[10];
|
|
; char Large[20];
|
|
; char *Ptr = n ? Small : Large + 19;
|
|
; return __builtin_object_size(Ptr, 0);
|
|
; }
|
|
;
|
|
; void foo() {
|
|
; size_t ret;
|
|
; size_t ret1;
|
|
; ret = foo1(0);
|
|
; ret1 = foo2(0);
|
|
; printf("\n%d %d\n", ret, ret1);
|
|
; }
|
|
|
|
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-unknown-linux-gnu"
|
|
|
|
@.str = private unnamed_addr constant [8 x i8] c"\0A%d %d\0A\00", align 1
|
|
|
|
define i64 @foo1(i32 %flag) {
|
|
entry:
|
|
%chararray = alloca [30 x i8], align 16
|
|
%chararray2 = alloca [10 x i8], align 1
|
|
%0 = getelementptr inbounds [30 x i8], [30 x i8]* %chararray, i64 0, i64 0
|
|
call void @llvm.lifetime.start(i64 30, i8* %0)
|
|
%1 = getelementptr inbounds [10 x i8], [10 x i8]* %chararray2, i64 0, i64 0
|
|
call void @llvm.lifetime.start(i64 10, i8* %1)
|
|
%tobool = icmp eq i32 %flag, 0
|
|
%cptr.0 = select i1 %tobool, i8* %0, i8* %1
|
|
%2 = call i64 @llvm.objectsize.i64.p0i8(i8* %cptr.0, i1 true)
|
|
call void @llvm.lifetime.end(i64 10, i8* %1)
|
|
call void @llvm.lifetime.end(i64 30, i8* %0)
|
|
ret i64 %2
|
|
; CHECK-LABEL: foo1
|
|
; CHECK: ret i64 10
|
|
}
|
|
|
|
declare void @llvm.lifetime.start(i64, i8* nocapture)
|
|
|
|
declare i64 @llvm.objectsize.i64.p0i8(i8*, i1)
|
|
|
|
declare void @llvm.lifetime.end(i64, i8* nocapture)
|
|
|
|
define i64 @foo2(i32 %n) {
|
|
entry:
|
|
%Small = alloca [10 x i8], align 1
|
|
%Large = alloca [20 x i8], align 16
|
|
%0 = getelementptr inbounds [10 x i8], [10 x i8]* %Small, i64 0, i64 0
|
|
call void @llvm.lifetime.start(i64 10, i8* %0)
|
|
%1 = getelementptr inbounds [20 x i8], [20 x i8]* %Large, i64 0, i64 0
|
|
call void @llvm.lifetime.start(i64 20, i8* %1)
|
|
%tobool = icmp ne i32 %n, 0
|
|
%add.ptr = getelementptr inbounds [20 x i8], [20 x i8]* %Large, i64 0, i64 19
|
|
%cond = select i1 %tobool, i8* %0, i8* %add.ptr
|
|
%2 = call i64 @llvm.objectsize.i64.p0i8(i8* %cond, i1 false)
|
|
call void @llvm.lifetime.end(i64 20, i8* %1)
|
|
call void @llvm.lifetime.end(i64 10, i8* %0)
|
|
ret i64 %2
|
|
; CHECK-LABEL: foo2
|
|
; CHECK: ret i64 10
|
|
}
|
|
|
|
define void @foo() {
|
|
entry:
|
|
%call = tail call i64 @foo1(i32 0)
|
|
%call1 = tail call i64 @foo2(i32 0)
|
|
%call2 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i64 %call, i64 %call1)
|
|
ret void
|
|
}
|
|
|
|
declare i32 @printf(i8* nocapture readonly, ...) |