llvm dev - Feb 2009 - [LLVMdev] Promoting i1,i8,i16

Is there a way to force llvm to promote all smaller types to i32 instead
of i16?

 

Thanks,

 

Micah Villmow

Systems Engineer

Advanced Technology & Performance

Advanced Micro Devices Inc.

S1-609 One AMD Place

Sunnyvale, CA. 94085

P: 408-749-3966

 

 

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On Tue, Feb 3, 2009 at 10:23 AM, Villmow, Micah <Micah.Villmow at amd.com>
wrote:
> Is there a way to force llvm to promote all smaller types to i32 instead of
> i16?
>
This might help. In TargetLowering.h:

  /// AddPromotedToType - If Opc/OrigVT is specified as being
promoted, the
  /// promotion code defaults to trying a larger integer/fp until it
can find
  /// one that works.  If that default is insufficient, this method
can be used
  /// by the target to override the default.
  void AddPromotedToType(unsigned Opc, MVT OrigVT, MVT DestVT) {
    PromoteToType[std::make_pair(Opc, OrigVT.getSimpleVT())]      
DestVT.getSimpleVT();
  }

-bw

On Tue, Feb 3, 2009 at 10:23 AM, Villmow, Micah <Micah.Villmow at amd.com>
wrote:
> Is there a way to force llvm to promote all smaller types to i32 instead of
> i16?
It should just work if i16 is also set to promote... what are you trying to do?

-Eli

I want to promote i1 to i32 and not i16 as i32 is my native type and i16
is emulated, but I need to handle i16 as a special case so I don't want
to promote it.

I will see if what Bill pointed out is what I need.

Micah

-----Original Message-----
From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu]
On Behalf Of Eli Friedman
Sent: Tuesday, February 03, 2009 11:08 AM
To: LLVM Developers Mailing List
Subject: Re: [LLVMdev] Promoting i1,i8,i16

On Tue, Feb 3, 2009 at 10:23 AM, Villmow, Micah <Micah.Villmow at amd.com>
wrote:
> Is there a way to force llvm to promote all smaller types to i32
instead of
> i16?
It should just work if i16 is also set to promote... what are you trying
to do?

-Eli
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