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103 Commits

Author SHA1 Message Date
Nadav Rotem 2cade68025 Loop Vectorizer: Update the cost model of scatter/gather operations and make 
them more expensive.

llvm-svn: 170995
 2012-12-23 07:23:55 +00:00
Bill Wendling c79e42c5ce Change 'AttrVal' to 'AttrKind' to better reflect that it's a kind of attribute instead of the value of the attribute. 
llvm-svn: 170972
 2012-12-22 00:37:52 +00:00
Roman Divacky a229186a82 Remove duplicate includes. 
llvm-svn: 170902
 2012-12-21 17:06:44 +00:00
Nadav Rotem 3b850b70b3 Enable if-conversion. 
llvm-svn: 170841
 2012-12-21 04:47:54 +00:00
Nadav Rotem e7785686a5 Fix a bug in the code that checks if we can vectorize loops while using dynamic 
memory bound checks.  Before the fix we were able to vectorize this loop from
the Livermore Loops benchmark:

for ( k=1 ; k<n ; k++ )
  x[k] = x[k-1] + y[k];

llvm-svn: 170811
 2012-12-21 00:07:35 +00:00
Nadav Rotem 2ababf68d7 LoopVectorize: Fix a bug in the scalarization of instructions. 
Before if-conversion we could check if a value is loop invariant
if it was declared inside the basic block. Now that loops have
multiple blocks this check is incorrect.

This fixes External/SPEC/CINT95/099_go/099_go

llvm-svn: 170756
 2012-12-20 20:24:40 +00:00
Nadav Rotem 8b20c0a814 Loop Vectorizer: turn-off if-conversion. 
llvm-svn: 170708
 2012-12-20 17:42:53 +00:00
Nadav Rotem 7bdc45b570 Loop Vectorizer: Enable if-conversion. 
llvm-svn: 170632
 2012-12-20 02:00:02 +00:00
Bill Wendling 3d7b0b8ac7 Rename the 'Attributes' class to 'Attribute'. It's going to represent a single attribute in the future. 
llvm-svn: 170502
 2012-12-19 07:18:57 +00:00
Benjamin Kramer f0e5d2f032 LoopVectorize: Emit reductions as log2(vectorsize) shuffles + vector ops instead of scalar operations. 
For example on x86 with SSE4.2 a <8 x i8> add reduction becomes
	movdqa	%xmm0, %xmm1
	movhlps	%xmm1, %xmm1            ## xmm1 = xmm1[1,1]
	paddw	%xmm0, %xmm1
	pshufd	$1, %xmm1, %xmm0        ## xmm0 = xmm1[1,0,0,0]
	paddw	%xmm1, %xmm0
	phaddw	%xmm0, %xmm0
	pextrb	$0, %xmm0, %edx

instead of
	pextrb	$2, %xmm0, %esi
	pextrb	$0, %xmm0, %edx
	addb	%sil, %dl
	pextrb	$4, %xmm0, %esi
	addb	%dl, %sil
	pextrb	$6, %xmm0, %edx
	addb	%sil, %dl
	pextrb	$8, %xmm0, %esi
	addb	%dl, %sil
	pextrb	$10, %xmm0, %edi
	pextrb	$14, %xmm0, %edx
	addb	%sil, %dil
	pextrb	$12, %xmm0, %esi
	addb	%dil, %sil
	addb	%sil, %dl

llvm-svn: 170439
 2012-12-18 18:40:20 +00:00
Nadav Rotem e5e28b48c8 Enable the Loop Vectorizer by default for O2 and O3. Disable if-conversion by default. I plan to revert this patch later today. 
llvm-svn: 170157
 2012-12-13 23:11:54 +00:00
Nadav Rotem 36510f7194 Teach the cost model about the optimization in r169904: Truncation of induction variables costs the same as scalar trunc. 
llvm-svn: 170051
 2012-12-13 00:21:03 +00:00
Nadav Rotem 6027bdf898 Fix indentation. 
llvm-svn: 170005
 2012-12-12 19:39:36 +00:00
Nadav Rotem d0bb22bba3 LoopVectorizer: Use the "optsize" attribute to decide if we are allowed to increase the function size. 
llvm-svn: 170004
 2012-12-12 19:29:45 +00:00
Nadav Rotem 6798a04b15 Fix the ascii drawing that was ruined when I split the H and CPP 
llvm-svn: 169955
 2012-12-12 01:33:47 +00:00
Nadav Rotem 4fa2e3d5af fix a typo. 
llvm-svn: 169953
 2012-12-12 01:31:10 +00:00
Nadav Rotem aeb17df802 LoopVectorizer: When -Os is used, vectorize only loops that dont require a tail loop. There is no testcase because I dont know of a way to initialize the loop vectorizer pass without adding an additional hidden flag. 
llvm-svn: 169950
 2012-12-12 01:11:46 +00:00
Nadav Rotem f707bf4ca3 PR14574. Fix a bug in the code that calculates the mask the converted PHIs in if-conversion. 
llvm-svn: 169916
 2012-12-11 21:30:14 +00:00
Nadav Rotem e266efb70b Loop Vectorize: optimize the vectorization of trunc(induction_var). The truncation is now done on scalars. 
llvm-svn: 169904
 2012-12-11 18:58:10 +00:00
Nadav Rotem dbb3328194 Fix PR14565. Don't if-convert loops that have switch statements in them. 
llvm-svn: 169813
 2012-12-11 04:55:10 +00:00
Nadav Rotem 07df5ac1a1 Split the LoopVectorizer into H and CPP. 
llvm-svn: 169771
 2012-12-10 21:39:02 +00:00
Nadav Rotem 7b5b55c195 Add support for reverse induction variables. For example: 
while (i--)
 sum+=A[i];

llvm-svn: 169752
 2012-12-10 19:25:06 +00:00
Paul Redmond 2adb13c100 LoopVectorize: support vectorizing intrinsic calls 
- added function to VectorTargetTransformInfo to query cost of intrinsics
- vectorize trivially vectorizable intrinsic calls such as sin, cos, log, etc.

Reviewed by: Nadav

llvm-svn: 169711
 2012-12-09 20:42:17 +00:00
Paul Redmond f7cd6b391a test commit. 
llvm-svn: 169709
 2012-12-09 19:46:31 +00:00
Nadav Rotem a8f026e2d4 LoopVectorizer: Increase the number of pointers that can be tested at runtime. If we cant prove statically that the pointers are disjoint then we add the runtime check. 
llvm-svn: 169334
 2012-12-04 23:25:24 +00:00