[LLVMdev] 32bit math being promoted to 64 bit

[Villmow, Micah]

I've attached the original ll file and the result of doing

llvm-as < test_fc_27.ll | opt -std-compile-opts > test_fc_27-opt.bc

llvm-dis test_fc_27-opt.bc

 

This is very problematic as 64 bit integer operations are software
emulated and I would rather not have them generated unless explicitly
requested by the programmer.

 

________________________________

From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu]
On Behalf Of Chris Lattner
Sent: Thursday, December 04, 2008 10:08 AM
To: LLVM Developers Mailing List
Subject: Re: [LLVMdev] 32bit math being promoted to 64 bit

 

 

On Dec 4, 2008, at 8:58 AM, Villmow, Micah wrote:





What optimization pass promotes 32 bit math operations to 64 bit
operations so I can disable it? I have code that works fine with
optimizations turned off but fails with it turned on because of this
stage.

 

 

Do you have a testcase?  An .ll file with no 64-bit operations, and one
optimization pass that introduces them?

 

-Chris

 

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