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2da4145cd8
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5233 Commits

Author SHA1 Message Date
Dan Gohman
2da4145cd8 Fix a bug in LoopStrengthReduce that caused it to emit IR with 
use-before-def. The problem comes up in code with multiple PHIs where
one PHI is being rewritten in terms of the other, but the other needs
to be casted first. LLVM rules requre the cast instruction to be
inserted after any PHI instructions, but when instructions were
inserted to replace the second PHI value with a function of the first,
they were ended up going before the cast instruction. Avoid this
problem by remembering the location of the cast instruction, when one
is needed, and inserting the expansion of the new value after it.

This fixes a bug that surfaced in 255.vortex on x86-64 when
instcombine was removed from the middle of the loop optimization
passes. 

llvm-svn: 51169
 2008-05-15 23:26:57 +00:00
Dale Johannesen
247e20c532 Remove the S92 code, which really has nothing to do 
with what the test is testing; makes it pass again on ppc32.

llvm-svn: 51167
 2008-05-15 22:23:54 +00:00
Dale Johannesen
f464bece2d Evan has implemented this on ppc, so run the test there. 
llvm-svn: 51166
 2008-05-15 22:22:37 +00:00
Dan Gohman
821bf58428 IR support for extractvalue and insertvalue instructions. Also, begin 
moving toward making structs and arrays first-class types.

llvm-svn: 51157
 2008-05-15 19:50:34 +00:00
Bill Wendling
c1d9f9604b Situations can arise when you have a function called that returns a 'void', but 
is bitcast to return a floating point value. The result of the instruction may
not be used by the program afterwards, and LLVM will happily remove all
instructions except the call. But, on some platforms, if a value is returned as
a floating point, it may need to be removed from the stack (like x87). Thus, we
can't get rid of the bitcast even if there isn't a use of the value.

llvm-svn: 51134
 2008-05-14 22:45:20 +00:00
Devang Patel
047ba6df54 Simplify internalize pass. Add test case. 
Patch by Matthijs Kooijman!

llvm-svn: 51114
 2008-05-14 20:01:01 +00:00
Dan Gohman
cd29e1fa60 When bit-twiddling CondCode values for integer comparisons produces 
SETOEQ, is it does with (SETEQ & SETULE), map it to SETEQ.

llvm-svn: 51112
 2008-05-14 18:17:09 +00:00
Tanya Lattner
ecd5a9390a Check if llvm-gcc is available before running tests. Patch by Matthijs Kooijman! 
llvm-svn: 51108
 2008-05-14 16:32:44 +00:00
Duncan Sands
d1ee8534e8 Make this test pass on x86-32 linux. 
llvm-svn: 51099
 2008-05-14 09:46:01 +00:00
Dale Johannesen
676a1d026b Fix for PR 2323, infinite loop in tail dup. 
llvm-svn: 51063
 2008-05-13 20:06:43 +00:00
Evan Cheng
9e15622879 Instead of a vector load, shuffle and then extract an element. Load the element from address with an offset. 
pshufd $1, (%rdi), %xmm0
        movd %xmm0, %eax
=>
        movl 4(%rdi), %eax

llvm-svn: 51026
 2008-05-13 08:35:03 +00:00
Owen Anderson
f67c06279b Add a testcase for non-local CSE of read-only calls. 
llvm-svn: 51025
 2008-05-13 08:17:44 +00:00
Evan Cheng
e4ee4c2870 On x86, it's safe to treat i32 load anyext as a normal i32 load. Ditto for i8 anyext load to i16. 
llvm-svn: 51019
 2008-05-13 00:54:02 +00:00
Evan Cheng
fcbdc8bd6e Xform bitconvert(build_pair(load a, load b)) to a single load if the load locations are at the right offset from each other. 
llvm-svn: 51008
 2008-05-12 23:04:07 +00:00
Dale Johannesen
b54491d31a New test for tail merging 
llvm-svn: 51007
 2008-05-12 22:59:44 +00:00
Mikhail Glushenkov
18508c5df4 Filter option names to escape symbols not allowed as C++ identifiers. 
Makes it possible to use options with names like "Wa,".
Also fixes the -Wall option handling as a side-effect.

llvm-svn: 50973
 2008-05-12 16:33:06 +00:00
Duncan Sands
45b1810980 Testcase for PR2264. 
llvm-svn: 50965
 2008-05-12 13:01:19 +00:00
Duncan Sands
15622620d3 Testcase for PR2303. 
llvm-svn: 50951
 2008-05-10 16:43:10 +00:00
Evan Cheng
c19c639ad7 When transforming a vector_shuffle to a load, the base address must not be an undef. 
llvm-svn: 50940
 2008-05-10 06:46:49 +00:00
Evan Cheng
fc4b8e1d96 Add nounwind. 
llvm-svn: 50931
 2008-05-10 02:22:25 +00:00
Evan Cheng
cf4d5567d5 If all sources of a PHI node are defined by an implicit_def, just emit an implicit_def instead of a copy. 
llvm-svn: 50927
 2008-05-10 00:17:50 +00:00
Evan Cheng
2adea48f7e Add a pattern to do move the low element of a v4f32 and zero extend the rest. 
llvm-svn: 50922
 2008-05-09 23:37:55 +00:00
Evan Cheng
3493e43afd Handle a few more cases of folding load i64 into xmm and zero top bits. 
Note, some of the code will be moved into target independent part of DAG combiner in a subsequent patch.

llvm-svn: 50918
 2008-05-09 21:53:03 +00:00
Evan Cheng
a0688bf1cb Simplify test. 
llvm-svn: 50911
 2008-05-09 19:56:32 +00:00
Chris Lattner
02ca137915 Implement PR2298. This transforms: 
~x < ~y --> y < x
   -x == -y --> x == y

llvm-svn: 50882
 2008-05-09 05:19:28 +00:00
Evan Cheng
f824b47188 Use movq to move low half of XMM register and zero-extend the rest. 
llvm-svn: 50874
 2008-05-08 22:35:02 +00:00
Chris Lattner
4c1ef3628b More than just loads can read from memory: readonly calls like strlen 
also need to be checked for memory modifying instructions before we
can sink them.  THis fixes the second half of PR2297.

llvm-svn: 50860
 2008-05-08 17:37:37 +00:00
Chris Lattner
cba8b4c7e8 Make instcombine's DSE respect loads as well as stores. It is not safe to 
delete the first store in:

store x -> p
load p
store y -> p

This is for PR2297.

llvm-svn: 50859
 2008-05-08 17:20:30 +00:00
Chris Lattner
9bf499a8b9 new testcase. 
llvm-svn: 50841
 2008-05-08 04:55:51 +00:00
Evan Cheng
f97e716511 Handle vector move / load which zero the destination register top bits (i.e. movd, movq, movss (addr), movsd (addr)) with X86 specific dag combine. 
llvm-svn: 50838
 2008-05-08 00:57:18 +00:00
Evan Cheng
7ff000c175 Add nounwind. 
llvm-svn: 50837
 2008-05-07 22:59:08 +00:00
Evan Cheng
c86c035346 Yet another nasty spiller bug. 
%ecx = op
store %cl<kill>, (addr)
(addr) = op %al

It's not safe to unfold the last operand and eliminate store even though %cl is marked kill. It's a sub-register use which means one of its super-register(s) may be used below.

llvm-svn: 50794
 2008-05-07 00:49:28 +00:00
Dan Gohman
6ea87fa437 Fix a bug in the ComputeMaskedBits logic for multiply. 
llvm-svn: 50793
 2008-05-07 00:35:55 +00:00
Bill Wendling
3cb8ee3c80 Removing. 
llvm-svn: 50786
 2008-05-06 23:56:22 +00:00
Anton Korobeynikov
a9ff11ea5f Use target triple in tests, not 'realign-stack=0' option. Per request. 
llvm-svn: 50778
 2008-05-06 23:09:29 +00:00
Owen Anderson
2dccdcf2f2 Testcase for r50770. 
llvm-svn: 50771
 2008-05-06 21:01:34 +00:00
Mikhail Glushenkov
5a403195b3 Move test files around a bit - fixes the reported number of test cases. 
llvm-svn: 50761
 2008-05-06 18:16:20 +00:00
Mikhail Glushenkov
3534026221 Use edge weights to choose the right linker based on input language names. 
llvm-svn: 50759
 2008-05-06 18:15:12 +00:00
Mikhail Glushenkov
78aa308f84 Add a --linker command-line option, make all tests pass. 
llvm-svn: 50755
 2008-05-06 18:13:00 +00:00
Mikhail Glushenkov
ffc7ee62c0 Add two (currently failing) tests. 
llvm-svn: 50752
 2008-05-06 18:11:21 +00:00
Mikhail Glushenkov
dc50e8c5fa Take object file as input and handle files with the same name correctly. 
llvm-svn: 50749
 2008-05-06 18:10:20 +00:00
Mikhail Glushenkov
40b652c238 First small tests for llvmc2. 
llvm-svn: 50734
 2008-05-06 17:24:54 +00:00
Duncan Sands
c96ff82e3e Testcase for PR2292. 
llvm-svn: 50718
 2008-05-06 14:56:40 +00:00
Evan Cheng
a84ed06284 Fix PR2287. Darwin passes mmx values in register in 64-mode, not Linux. 
llvm-svn: 50716
 2008-05-06 07:23:50 +00:00
Dan Gohman
faf9df7227 Correct the value of LowBits in srem and urem handling in 
ComputeMaskedBits.

llvm-svn: 50692
 2008-05-06 00:51:48 +00:00
Chris Lattner
50d16c2939 Fix a crash when threading a block that includes a MRV call result. 
DemoteRegToStack doesn't work with MRVs yet, because it relies on the
ability to load/store things.

This fixes PR2285.

llvm-svn: 50667
 2008-05-05 20:21:22 +00:00
Mon P Wang
84a269e023 Added addition atomic instrinsics and, or, xor, min, and max. 
llvm-svn: 50663
 2008-05-05 19:05:59 +00:00
Chris Lattner
ca94848f66 no need for eh info 
llvm-svn: 50658
 2008-05-05 18:24:33 +00:00
Dan Gohman
c860d9c77c Add AsmPrinter support for emitting a directive to declare that 
the code being generated does not require an executable stack.

Also, add target-specific code to make use of this on Linux
on x86. 

llvm-svn: 50634
 2008-05-05 00:28:39 +00:00
Owen Anderson
611b415d12 Fix PR1098 by correcting the postdominators analysis. 
Patch by Florian Brandner.

llvm-svn: 50628
 2008-05-04 21:07:35 +00:00