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19 Commits

Author SHA1 Message Date
Chris Lattner
05f18920e1 Teach inst combine to merge GEPs through PHIs. This is really 
important because it is sinking the loads using the GEPs, but
not the GEPs themselves.  This triggers 647 times on 403.gcc
and makes the .s file much much nicer.  For example before:

        je      LBB1_87 ## bb78
LBB1_62:        ## bb77
        leal    84(%esi), %eax
LBB1_63:        ## bb79
        movl    (%eax), %eax
...
LBB1_87:        ## bb78
        movl    $0, 4(%esp)
        movl    %esi, (%esp)
        call    L_make_decl_rtl$stub
        jmp     LBB1_62 ## bb77


after:

        jne     LBB1_63 ## bb79
LBB1_62:        ## bb78
        movl    $0, 4(%esp)
        movl    %esi, (%esp)
        call    L_make_decl_rtl$stub
LBB1_63:        ## bb79
        movl    84(%esi), %eax

The input code was (and the GEPs are merged and
the PHI is now eliminated by instcombine):

        br i1 %tmp233, label %bb78, label %bb77
bb77:           
        %tmp234 = getelementptr %struct.tree_node* %t_addr.3, i32 0, i32 0, i32 22              
        br label %bb79
bb78:           
        call void @make_decl_rtl(%struct.tree_node* %t_addr.3, i8* null) nounwind
        %tmp235 = getelementptr %struct.tree_node* %t_addr.3, i32 0, i32 0, i32 22              
        br label %bb79
bb79:           
        %iftmp.12.0.in = phi %struct.rtx_def** [ %tmp235, %bb78 ], [ %tmp234, %bb77 ]           
        %iftmp.12.0 = load %struct.rtx_def** %iftmp.12.0.in             



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60322 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-12-01 02:34:36 +00:00
Tanya Lattner
ec9a35a6f9 Remove llvm-upgrade and update test cases. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47793 91177308-0d34-0410-b5e6-96231b3b80d8
 2008-03-01 09:15:35 +00:00
Reid Spencer
7c65d4345e For PR1319: 
Make use of the END. facility on all files > 1K so that we aren't wasting CPU
cycles searching for RUN: lines that we'll never find.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36059 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-15 07:38:21 +00:00
Reid Spencer
2b544beda3 For PR1319: 
Upgrade tests to work with new llvm.exp version of llvm_runtest.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36013 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-04-14 20:13:02 +00:00
Chris Lattner
151becec7e new testcase 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33233 91177308-0d34-0410-b5e6-96231b3b80d8
 2007-01-15 07:29:29 +00:00
Reid Spencer
69ccadd753 Use the llvm-upgrade program to upgrade llvm assembly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32115 91177308-0d34-0410-b5e6-96231b3b80d8
 2006-12-02 04:23:10 +00:00
Chris Lattner
6e54db0852 New testcase: the phi can be eliminated if the casts are sucked into it. 
Note that this reduces code size anyway (as well as making further
optimizations simpler) so it's always a win.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17739 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-11-14 19:12:17 +00:00
Chris Lattner
e58b25490b Fix typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17738 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-11-14 17:54:58 +00:00
Chris Lattner
56ef3aebd8 add a testcase, which we already handle 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17737 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-11-14 17:54:27 +00:00
Chris Lattner
7bbf388753 remove bogus test 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13827 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-05-27 07:39:51 +00:00
Chris Lattner
efd74a0159 The instruction combining pass removes dead instructions, there is no need 
to run the die pass after it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11942 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-28 05:26:06 +00:00
Chris Lattner
d8bed768ab A new testcase for a situation that occurs in 181.mcf 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11493 91177308-0d34-0410-b5e6-96231b3b80d8
 2004-02-16 05:06:36 +00:00
Misha Brukman
e78760e179 Renamed as' => llvm-as', dis' => llvm-dis', link' => llvm-link'. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8558 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-09-16 15:29:54 +00:00
Chris Lattner
060c1f816c Remove usage of grep-not script 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6966 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-28 23:32:04 +00:00
Chris Lattner
c6cab24151 Convert scripts from using explicit control flow to use the new grep-not script 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6955 91177308-0d34-0410-b5e6-96231b3b80d8
 2003-06-28 22:44:42 +00:00
Chris Lattner
b81258c278 Add new testcases for instcombine 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3477 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-08-22 21:26:15 +00:00
Chris Lattner
dce9427985 New testcase for instcombine 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@3396 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-08-20 15:27:45 +00:00
Chris Lattner
fee97e83ce Make the testcase more interesting so that DCE does not eliminate it. 
Use DIE instead of DCE anyway


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2500 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-05-06 17:59:23 +00:00
Chris Lattner
32e1740c7c New testcase for PHI folding 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2495 91177308-0d34-0410-b5e6-96231b3b80d8
 2002-05-06 17:43:38 +00:00