[llvm-commits] [llvm] r76823 - /llvm/trunk/test/CodeGen/PowerPC/private.ll

[Evan Cheng]

On Jul 23, 2009, at 7:59 PM, Chris Lattner wrote:

>
> On Jul 22, 2009, at 5:09 PM, Dan Gohman wrote:
>
>> Author: djg
>> Date: Wed Jul 22 19:09:46 2009
>> New Revision: 76823
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=76823&view=rev
>> Log:
>> Revert r75663 (and r76805), as it is causing regressions on powerpc.
>
> Hi Dan,
>
> Are you looking into this?  My understanding is that this test is
> exposing nondeterminism in the backend.  Is there a bug tracking this?

There is an Apple internal bug on this. Dan believes this is some kind  
of non-determinism in the top down scheduler. I have no other  
information at this point.

Evan

>
> -Chris
>
>>
>> Modified:
>>   llvm/trunk/test/CodeGen/PowerPC/private.ll
>>
>> Modified: llvm/trunk/test/CodeGen/PowerPC/private.ll
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/PowerPC/private.ll?rev=76823&r1=76822&r2=76823&view=diff
>>
>> =
>> =
>> =
>> =
>> =
>> =
>> =
>> =
>> = 
>> =====================================================================
>> --- llvm/trunk/test/CodeGen/PowerPC/private.ll (original)
>> +++ llvm/trunk/test/CodeGen/PowerPC/private.ll Wed Jul 22 19:09:46
>> 2009
>> @@ -1,32 +1,24 @@
>> ; Test to make sure that the 'private' is used correctly.
>> ;
>> -; RUN: llvm-as < %s | llc -mtriple=powerpc-unknown-linux-gnu -
>> march=ppc32 | FileCheck %s -check-prefix=LINUX
>> -; RUN: llvm-as < %s | llc -mtriple=powerpc-apple-darwin -
>> march=ppc32 | FileCheck %s -check-prefix=DARWIN
>> +; RUN: llvm-as < %s | llc -mtriple=powerpc-unknown-linux-gnu > %t
>> +; RUN: grep .Lfoo: %t
>> +; RUN: grep bl.*\.Lfoo %t
>> +; RUN: grep .Lbaz: %t
>> +; RUN: grep lis.*\.Lbaz %t
>> +; RUN: llvm-as < %s | llc -mtriple=powerpc-apple-darwin > %t
>> +; RUN: grep L_foo: %t
>> +; RUN: grep bl.*\L_foo %t
>> +; RUN: grep L_baz: %t
>> +; RUN: grep lis.*\L_baz %t
>>
>> define private void @foo() nounwind {
>>        ret void
>> -; LINUX: .Lfoo:
>> -
>> -; DARWIN: L_foo:
>> }
>>
>> + at baz = private global i32 4;
>> +
>> define i32 @bar() nounwind {
>>        call void @foo()
>> 	%1 = load i32* @baz, align 4
>>        ret i32 %1
>> -; LINUX: bar:
>> -; LINUX: bl .Lfoo
>> -; LINUX: lis 3, .Lbaz at ha
>> -; LINUX: lwz 3, .Lbaz at l(3)
>> -
>> -; DARWIN: _bar:
>> -; DARWIN: bl L_foo
>> -; DARWIN: lis r2, ha16(L_baz)
>> -; DARWIN: lwz r3, lo16(L_baz)(r2)
>> }
>> -
>> -
>> -; LINUX: .Lbaz:
>> -; DARWIN: L_baz:
>> - at baz = private global i32 4
>> -
>>
>>
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