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Author SHA1 Message Date
Bill Wendling
869d60d39d Machine sink could potentially sink instructions into a block where the physical 
registers it defines then interfere with an existing preg live range.

For instance, if we had something like these machine instructions:

BB#0
  ... = imul ... EFLAGS<imp-def,dead>
  test ..., EFLAGS<imp-def>
  jcc BB#2 EFLAGS<imp-use>

BB#1
  ... ; fallthrough to BB#2

BB#2
  ... ; No code that defines EFLAGS
  jcc ... EFLAGS<imp-use>

Machine sink will come along, see that imul implicitly defines EFLAGS, but
because it's "dead", it assumes that it can move imul into BB#2. But when it
does, imul's "dead" imp-def of EFLAGS is raised from the dead (a zombie) and
messes up the condition code for the jump (and pretty much anything else which
relies upon it being correct).

The solution is to know which pregs are live going into a basic block. However,
that information isn't calculated at this point. Nor does the LiveVariables pass
take into account non-allocatable physical registers. In lieu of this, we do a
*very* conservative pass through the basic block to determine if a preg is live
coming out of it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105387 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-03 07:54:20 +00:00
Eric Christopher
7310064f4d One underscore, not two. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105379 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-03 04:02:59 +00:00
Eli Friedman
268637ed0f Implement expansion in type legalization for add/sub with overflow. The 
expansion is the same as that used by LegalizeDAG.

The resulting code sucks in terms of performance/codesize on x86-32 for a
64-bit operation; I haven't looked into whether different expansions might be
better in general.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105378 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-03 03:49:50 +00:00
Evan Cheng
9d709a8edb Enable machine cse of instructions which define physical registers. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105308 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-02 01:08:27 +00:00
Devang Patel
735419dfe7 DwarfWrite is now smart enough to drop debug value pointing to undefined register. Update this test to avoid this. 
iSel not properly lowring argument into a well formed DBG_VALUE in some cases is a separate issue and not related to the test in this testcase.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105295 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-01 23:01:43 +00:00
Devang Patel
9126c0d42a Keep track of incoming debug value of unused argument. 
Radar 7927666.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105285 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-01 19:59:01 +00:00
Dan Gohman
956b349034 Fill in missing support for ISD::FEXP, ISD::FPOWI, and friends. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105283 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-01 18:35:14 +00:00
Kalle Raiskila
11fe24624a Fix handling of 'load' nodes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105269 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-06-01 13:34:47 +00:00
Bill Wendling
21330544df Debreak test for non-Darwin. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105257 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-31 21:47:24 +00:00
Duncan Sands
2914ba6ec7 Fix PR7272: when inlining through a callsite with byval arguments, 
the newly created allocas may be used by inlined calls, so these
need to have their tail call flags cleared.  Fixes PR7272.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105255 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-31 21:00:26 +00:00
Eric Christopher
89e735673a Add a test for the llvm-gcc commit in r90200. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105253 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-31 20:39:10 +00:00
Chris Lattner
6c41ad8c9a fix PR6623: when optimizing for size, don't inline memcpy/memsets 
that are too large.  This causes the freebsd bootloader to be too
large apparently.

It's unclear if this should be an -Os or -Oz thing.  Thoughts welcome.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105228 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-31 17:30:14 +00:00
Chris Lattner
0ece9a12ac upgrade and filecheckize this test. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105227 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-31 17:27:17 +00:00
Nick Lewycky
a9d6680cb1 The memcpy intrinsic only takes i8* for %src and %dst, so cast them to that 
first. Fixes PR7265.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105206 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-31 06:16:35 +00:00
Evan Cheng
701d4d309f Remove schedule-livein-copies. It's not being used. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105095 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-29 02:23:39 +00:00
Evan Cheng
9c044674e6 Fix PR7193: if sibling call address can take a register, make sure there are enough registers available by counting inreg arguments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105092 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-29 01:35:22 +00:00
Evan Cheng
046fa3f90a Fix some latency computation bugs: if the use is not a machine opcode do not just return zero. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105061 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-28 23:26:21 +00:00
Dan Gohman
aec2a0dbce Add lint checks for function attributes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105009 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-28 21:43:57 +00:00
Kevin Enderby
31cc9655b6 MC/X86: Add alias for movzx. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105005 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-28 21:20:21 +00:00
Kevin Enderby
5e394429ab MC/X86: Add alias for fwait. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105001 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-28 20:59:10 +00:00
Kevin Enderby
31b6c5b2f3 Fix the use of x86 control and debug registers so that the assertion failure in 
getX86RegNum() does not happen.  Patch by Shantonu Sen!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104994 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-28 19:01:27 +00:00
Dale Johannesen
7722b082c4 Add missing space; works for me. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104992 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-28 18:45:59 +00:00
Dan Gohman
13ec30b6a1 Fix lint's memcpy and memmove checks, and its basic block traversal. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104970 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-28 17:44:00 +00:00
Jakob Stoklund Olesen
90a2322023 Fix more tests that depended on the default register allocator choice. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104961 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-28 17:06:30 +00:00
Dan Gohman
17d95965cb Detect self-referential values. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104957 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-28 16:45:33 +00:00
Dan Gohman
34220aedc4 Remove this va_arg test, which is no longer applicable. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104956 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-28 16:44:04 +00:00
Stuart Hastings
8ffc42f8ea Revert 104841, 104842, 104876 due to buildbot failures. Radar 7424645. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104953 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-28 16:41:07 +00:00
Dan Gohman
078f8595b5 Eli pointed out that va_arg instruction result values don't 
reference the stack.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104951 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-28 16:34:49 +00:00
Dan Gohman
ff26d4e9ce Teach lint how to look through simple store+load pairs and other 
effective no-op constructs, to make it more effective on
unoptimized IR.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104950 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-28 16:21:24 +00:00
Dan Gohman
05d6253727 Teach instcombine to promote alloca array sizes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104945 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-28 15:09:00 +00:00
Dan Gohman
8496d50412 Add a testcase for getelementptr index promotion. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104944 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-28 15:07:59 +00:00
Dan Gohman
292fc87fe2 Add a lint check for returning the address of stack memory. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104936 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-28 04:33:42 +00:00
Dan Gohman
f75a7d3fbf Eliminate the restriction that the array size in an alloca must be i32. 
This will help reduce the amount of casting required on 64-bit targets.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104911 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-28 01:14:11 +00:00
Jakob Stoklund Olesen
700bfada63 Add a -regalloc=default option that chooses a register allocator based on the -O 
optimization level.

This only really affects llc for now because both the llvm-gcc and clang front
ends override the default register allocator. I intend to remove that code later.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104904 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-27 23:57:25 +00:00
Evan Cheng
84f60b7359 llvm can't correctly support 'H', 'Q' and 'R' modifiers. Just mark it an error. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104891 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-27 22:08:38 +00:00
Kevin Enderby
bd658918df MC/X86: Add aliases for Jcc variants. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104890 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-27 21:33:19 +00:00
Devang Patel
d8720f4ba3 Do not drop location info for inlined function args. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104884 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-27 20:25:04 +00:00
Stuart Hastings
57041b6f33 Adjust test case for lexical block pruning. Follow-on to r104842 and Radar 7424645. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104876 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-27 19:57:51 +00:00
Devang Patel
57bd643113 Let's try one more time to match patterns. 
The goal is to match following 3 lines. In otherwords, a temp. label between to DEBUG_VALUE comments.
        ;DEBUG_VALUE: bar:x <- undef   ## 2010-01-18-Inlined-Debug.c:7
Ltmp1:
        ;DEBUG_VALUE: foo:__x <- undef ## 2010-01-18-Inlined-Debug.c:5



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104872 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-27 19:46:38 +00:00
Duncan Sands
1d9b973fd7 Teach instCombine to remove malloc+free if malloc's only uses are comparisons 
to null.  Patch by Matti Niemenmaa.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104871 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-27 19:09:06 +00:00
Devang Patel
895f2dfd45 Temp. labels number may not match for all configurations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104858 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-27 17:51:08 +00:00
Devang Patel
55e9717e59 inlined function's arguments need a label to mark the start point because they are not directly attached to current function. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104848 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-27 16:47:30 +00:00
Stuart Hastings
aa66d2f48a Support for nested functions/classes in debug output. Radar 7424645. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104841 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-27 16:16:54 +00:00
Gabor Greif
2893a460d8 rename test to represent meaningful date 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104831 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-27 09:32:38 +00:00
Bob Wilson
cdef41a6b4 Add a test for llvm-gcc svn r104726. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104805 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-27 05:30:36 +00:00
Eric Christopher
bd3ba537cd Add a quick test of relocations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104794 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-27 00:53:40 +00:00
Devang Patel
80250686d5 Simplify. Eliminate unneeded debug_loc entry. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104785 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-26 23:55:23 +00:00
Dan Gohman
882ddb492d Reinstate checking of stackrestore, with checking for both Read 
and Write, and add a comment explaining this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104756 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-26 22:21:25 +00:00
Dan Gohman
113b3e2c6e Implement checking of the tail keyword. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104744 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-26 21:46:36 +00:00
Devang Patel
394427b014 Update debug info when live-in reg is copied into a vreg. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104732 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-26 20:18:50 +00:00