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LLVM backend for 6502
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84734ce8ef
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Chris Lattner 84734ce8ef Fix a bug in the 'store fpimm, ptr' -> 'store intimm, ptr' handling code. 
Changing 'op' here caused us to not enter the store into a map, causing
reemission of the code!!  In practice, a simple loop like this:

no_exit:                ; preds = %no_exit, %entry
        %indvar = phi uint [ %indvar.next, %no_exit ], [ 0, %entry ]            ; <uint> [#uses=3]
        %tmp.4 = getelementptr "complex long double"* %P, uint %indvar, uint 0          ; <double*> [#uses=1]
        store double 0.000000e+00, double* %tmp.4
        %indvar.next = add uint %indvar, 1              ; <uint> [#uses=2]
        %exitcond = seteq uint %indvar.next, %N         ; <bool> [#uses=1]
        br bool %exitcond, label %return, label %no_exit

was being code gen'd to:

.LBBtest_1:     # no_exit
        movl %edx, %esi
        shll $4, %esi
        movl $0, 4(%eax,%esi)
        movl $0, (%eax,%esi)
        incl %edx
        movl $0, (%eax,%esi)
        movl $0, 4(%eax,%esi)
        cmpl %ecx, %edx
        jne .LBBtest_1  # no_exit

Note that we are doing 4 32-bit stores instead of 2.  Now we generate:

.LBBtest_1:     # no_exit
        movl %edx, %esi
        incl %esi
        shll $4, %edx
        movl $0, (%eax,%edx)
        movl $0, 4(%eax,%edx)
        cmpl %ecx, %esi
        movl %esi, %edx
        jne .LBBtest_1  # no_exit

This is much happier, though it would be even better if the increment of ESI
was scheduled after the compare :-/


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@20265 91177308-0d34-0410-b5e6-96231b3b80d8
2005-02-22 07:23:39 +00:00
autoconf Remove the "pax" program from the list of those needed to support LLVM. 2005-02-16 16:21:00 +00:00
docs add another plausible reason 2005-02-21 16:35:31 +00:00
examples Use LLVMLIBS=JIT to get JIT libraries 2004-11-29 07:17:18 +00:00
include/llvm Change __MINGW to __MINGW32__. Patch submitted by Henrik Bach. 2005-02-19 03:01:13 +00:00
lib Fix a bug in the 'store fpimm, ptr' -> 'store intimm, ptr' handling code. 2005-02-22 07:23:39 +00:00
projects Update makefile to use PROJ_* makefile variables intead of BUILD_* as 2005-02-14 16:04:28 +00:00
runtime Hrm, who knows what 'uint' is, but it seems to work sometimes? Wierd. 2005-01-28 19:37:35 +00:00
test new testcase for PR523 2005-02-21 04:03:32 +00:00
tools Adjust the help output so that it will fit cleanly within 80 columns. 2005-02-18 20:00:05 +00:00
utils Include local time on the web page for start/end times. 2005-02-13 16:08:30 +00:00
win32 Somehow tablegen.exe got moved... fix up tablegen invocations to match. 2005-02-16 05:06:52 +00:00
.cvsignore Ignore the autom4te.cache directoy. 2004-12-24 15:11:23 +00:00
configure Remove the "pax" program from the list of those needed to support LLVM. 2005-02-16 16:21:00 +00:00
CREDITS.TXT New entry. 2005-02-19 17:14:24 +00:00
LICENSE.TXT Another year, another copyright update. 2005-01-08 19:10:44 +00:00
llvm.spec Updated for 1.3. 2004-08-16 15:17:40 +00:00
llvm.spec.in Updated for 1.3. 2004-08-16 15:17:40 +00:00
Makefile Remove the check target. Its now in Makefile.rules 2004-12-06 05:35:00 +00:00
Makefile.common Update comments to reflect new variable names. Patch contributed by 2005-02-14 16:02:19 +00:00
Makefile.config.in Remove the "pax" program from the list of those needed to support LLVM. 2005-02-16 16:21:00 +00:00
Makefile.rules Fix installation of configuration files. 2005-02-16 16:17:11 +00:00
README.txt Make the text of this file a little more useful. 2004-09-02 22:49:27 +00:00

README.txt 

Low Level Virtual Machine (LLVM)
================================

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LLVM is open source software. You may freely distribute it under the terms of
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Please see the HTML documentation provided in docs/index.html for further
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