[llvm] r225214 - [PowerPC] Convert a README.txt entry into a better test

[Hal Finkel]

r225220 should fix that. Sorry.

 -Hal

----- Original Message -----
> From: "Duncan P. N. Exon Smith" <dexonsmith at apple.com>
> To: "Hal Finkel" <hfinkel at anl.gov>
> Cc: llvm-commits at cs.uiuc.edu
> Sent: Monday, January 5, 2015 5:16:27 PM
> Subject: Re: [llvm] r225214 - [PowerPC] Convert a README.txt entry into a better test
> 
> I meant this:
> 
> This test fails (at least on Darwin):
> 
> http://lab.llvm.org:8080/green/view/Clang/job/clang-stage1-cmake-RA-incremental_check/2358/
> http://lab.llvm.org:8080/green/view/Clang/job/clang-stage1-cmake-RA-incremental_check/2358/testReport/
> http://lab.llvm.org:8080/green/view/Clang/job/clang-stage1-cmake-RA-incremental_check/2358/testReport/LLVM/CodeGen_PowerPC/2007_03_24_cntlzd_ll/
> 
> > On 2015-Jan-05, at 13:53, Hal Finkel <hfinkel at anl.gov> wrote:
> > 
> > Author: hfinkel
> > Date: Mon Jan  5 15:53:52 2015
> > New Revision: 225214
> > 
> > URL: http://llvm.org/viewvc/llvm-project?rev=225214&view=rev
> > Log:
> > [PowerPC] Convert a README.txt entry into a better test
> > 
> > We now produce the desired code as noted in the README.txt file (no
> > spurious
> > or). Remove the README entry and improve the regression test.
> > 
> > Modified:
> >    llvm/trunk/lib/Target/PowerPC/README.txt
> >    llvm/trunk/test/CodeGen/PowerPC/2007-03-24-cntlzd.ll
> > 
> > Modified: llvm/trunk/lib/Target/PowerPC/README.txt
> > URL:
> > http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/PowerPC/README.txt?rev=225214&r1=225213&r2=225214&view=diff
> > ==============================================================================
> > --- llvm/trunk/lib/Target/PowerPC/README.txt (original)
> > +++ llvm/trunk/lib/Target/PowerPC/README.txt Mon Jan  5 15:53:52
> > 2015
> > @@ -494,19 +494,6 @@ _bar:
> > 
> > ===-------------------------------------------------------------------------===
> > 
> > -test/CodeGen/PowerPC/2007-03-24-cntlzd.ll compiles to:
> > -
> > -__ZNK4llvm5APInt17countLeadingZerosEv:
> > -        ld r2, 0(r3)
> > -        cntlzd r2, r2
> > -        or r2, r2, r2     <<-- silly.
> > -        addi r3, r2, -64
> > -        blr
> > -
> > -The dead or is a 'truncate' from 64- to 32-bits.
> > -
> > -===-------------------------------------------------------------------------===
> > -
> > We generate horrible ppc code for this:
> > 
> > #define N  2000000
> > 
> > Modified: llvm/trunk/test/CodeGen/PowerPC/2007-03-24-cntlzd.ll
> > URL:
> > http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/PowerPC/2007-03-24-cntlzd.ll?rev=225214&r1=225213&r2=225214&view=diff
> > ==============================================================================
> > --- llvm/trunk/test/CodeGen/PowerPC/2007-03-24-cntlzd.ll (original)
> > +++ llvm/trunk/test/CodeGen/PowerPC/2007-03-24-cntlzd.ll Mon Jan  5
> > 15:53:52 2015
> > @@ -1,4 +1,4 @@
> > -; RUN: llc < %s -march=ppc64 -mcpu=g5 | grep cntlzd
> > +; RUN: llc < %s -march=ppc64 -mcpu=g5 | FileCheck %s
> > 
> > define i32 @_ZNK4llvm5APInt17countLeadingZerosEv(i64 *%t) nounwind
> > {
> >         %tmp19 = load i64* %t
> > @@ -7,6 +7,12 @@ define i32 @_ZNK4llvm5APInt17countLeadin
> >         %tmp89 = add i32 %tmp23, -64          ; <i32> [#uses=1]
> >         %tmp90 = add i32 %tmp89, 0            ; <i32> [#uses=1]
> >         ret i32 %tmp90
> > +
> > +; CHECK-LABEL: @_ZNK4llvm5APInt17countLeadingZerosEv
> > +; CHECK: ld [[REG1:[0-9]+]], 0(3)
> > +; CHECK-NEXT: cntlzd [[REG2:[0-9]+]], [[REG1]]
> > +; CHECK-NEXT: addi 3, [[REG2]], -64
> > +; CHECK-NEXT: blr
> > }
> > 
> > declare i64 @llvm.ctlz.i64(i64, i1)
> > 
> > 
> > _______________________________________________
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> > llvm-commits at cs.uiuc.edu
> > http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
> 
> 

-- 
Hal Finkel
Assistant Computational Scientist
Leadership Computing Facility
Argonne National Laboratory