064cb4c807
Add a test for PR4413, which was apparently fixed at some point in the past.
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llvm-svn: 112987
2010-09-03 18:33:08 +00:00
f6befffbb2
fix PR6512, a case where instcombine would incorrectly merge loads
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from different addr spaces.
llvm-svn: 97813
2010-03-05 18:53:28 +00:00
0685be3441
enhance PHI slicing to handle the case when a slicable PHI is begin
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used by a chain of other PHIs.
llvm-svn: 86503
2009-11-09 01:38:00 +00:00
2299d4b6d8
Teach an instcombine to not pull trunc instructions through PHI nodes
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when both the source and dest are illegal types, since it would cause
the phi to grow (for example, we shouldn't transform test14b's phi to
a phi on i320). This fixes an infinite loop on i686 bootstrap with
phi slicing turned on, so turn it back on.
llvm-svn: 86483
2009-11-08 21:20:06 +00:00
a837e4db6b
reapply r8644[3-5] with only the scary part
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(SliceUpIllegalIntegerPHI) disabled.
llvm-svn: 86480
2009-11-08 19:23:30 +00:00
4c41373c56
Speculatively revert r8644[3-5], they seem to be leading to infinite loops in
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llvm-gcc bootstrap.
llvm-svn: 86478
2009-11-08 17:52:47 +00:00
99db7963b4
another more interesting test.
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llvm-svn: 86445
2009-11-08 08:36:40 +00:00
7c8b29ef61
feature test for the new transformation in r86443
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llvm-svn: 86444
2009-11-08 08:30:58 +00:00
c7a450b5b2
teach a couple of instcombine transformations involving PHIs to
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not turn a PHI in a legal type into a PHI of an illegal type, and
add a new optimization that breaks up insane integer PHI nodes into
small pieces (PR3451).
llvm-svn: 86443
2009-11-08 08:21:13 +00:00
3e6398baa5
merge phi-merge.ll into phi.ll
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I don't know what Dan wants to do with phi-merge-gep.ll, I'll let
him deal with it because instcombine may end up sinking these.
llvm-svn: 85739
2009-11-01 20:10:11 +00:00
328ef89bd1
when merging two loads, make sure to take the min of their alignment,
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not the max. This didn't matter until the previous patch because
instcombine would refuse to sink loads with differenting alignments.
llvm-svn: 85738
2009-11-01 20:07:07 +00:00
0b40a8bc0e
fix a bug noticed by inspection: when instcombine sinks loads through
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phis, it didn't preserve the alignment of the load. This is a missed
optimization of the alignment is high and a miscompilation when the
alignment is low.
llvm-svn: 85736
2009-11-01 19:50:13 +00:00
d162b5c955
convert to filecheck.
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llvm-svn: 85734
2009-11-01 19:22:20 +00:00
72a13d2476
Use opt -S instead of piping bitcode output through llvm-dis.
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llvm-svn: 81257
2009-09-08 22:34:10 +00:00
9737a63ed8
Change these tests to feed the assembly files to opt directly, instead
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of using llvm-as, now that opt supports this.
llvm-svn: 81226
2009-09-08 16:50:01 +00:00
9d02a70a7d
Teach inst combine to merge GEPs through PHIs. This is really
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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
llvm-svn: 60322
2008-12-01 02:34:36 +00:00
5640bd186a
Remove llvm-upgrade and update test cases.
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llvm-svn: 47793
2008-03-01 09:15:35 +00:00
ede8c3b92c
For PR1319:
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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.
llvm-svn: 36059
2007-04-15 07:38:21 +00:00
91948d4cad
For PR1319:
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Upgrade tests to work with new llvm.exp version of llvm_runtest.
llvm-svn: 36013
2007-04-14 20:13:02 +00:00
83b3d82672
Regression is gone, don't try to find it on clean target.
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llvm-svn: 33296
2007-01-17 07:59:14 +00:00
Owen Anderson