[llvm-commits] [llvm] r46372 - /llvm/trunk/test/CFrontend/2008-01-25-ByValReadNone.c

[Chris Lattner]

On Jan 25, 2008, at 4:35 PM, Evan Cheng wrote:
> How would this test case pass if the target does not pass structs  
> byval?

That's why I picked a big struct.  :)

-Chris

>
> Evan
>
> On Jan 25, 2008, at 2:36 PM, Chris Lattner wrote:
>
>> Author: lattner
>> Date: Fri Jan 25 16:36:24 2008
>> New Revision: 46372
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=46372&view=rev
>> Log:
>> add a testcase for a bug Duncan pointed out.
>>
>> Added:
>>    llvm/trunk/test/CFrontend/2008-01-25-ByValReadNone.c
>>
>> Added: llvm/trunk/test/CFrontend/2008-01-25-ByValReadNone.c
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CFrontend/
>> 2008-01-25-ByValReadNone.c?rev=46372&view=auto
>>
>> = 
>> =====================================================================
>> ========
>> --- llvm/trunk/test/CFrontend/2008-01-25-ByValReadNone.c (added)
>> +++ llvm/trunk/test/CFrontend/2008-01-25-ByValReadNone.c Fri Jan 25
>> 16:36:24 2008
>> @@ -0,0 +1,10 @@
>> +// RUN: %llvmgcc -O3 -S -o - -emit-llvm %s | grep readonly
>> +// RUN: %llvmgcc -O3 -S -o - -emit-llvm %s | not grep readnone
>> +
>> +
>> +// The struct being passed byval means that we need to mark the
>> +// function readonly instead of readnone.  Readnone would allow
>> +// stores to the arg to be deleted in the caller.
>> +struct S { int A[1000]; };
>> +int __attribute__ ((const)) f(struct S x) { return x.A[0]; }
>> +
>>
>>
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