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bd0298b1e1
The code have been developed by Daniel Berlin over the years, and the new implementation goal is that of addressing shortcomings of the current GVN infrastructure, i.e. long compile time for large testcases, lack of phi predication, no load/store value numbering etc... The current code just implements the "core" GVN algorithm, although other pieces (load coercion, phi handling, predicate system) are already implemented in a branch out of tree. Once the core is stable, we'll start adding pieces on top of the base framework. The test currently living in test/Transform/NewGVN are a copy of the ones in GVN, with proper `XFAIL` (missing features in NewGVN). A flag will be added in a future commit to enable NewGVN, so that interested parties can exercise this code easily. Differential Revision: https://reviews.llvm.org/D26224 llvm-svn: 290346
44 lines
2.1 KiB
LLVM
44 lines
2.1 KiB
LLVM
; XFAIL: *
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; RUN: opt < %s -basicaa -newgvn -S | FileCheck %s
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declare void @llvm.masked.scatter.v2i32(<2 x i32> , <2 x i32*> , i32 , <2 x i1> )
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declare <2 x i32> @llvm.masked.gather.v2i32(<2 x i32*>, i32, <2 x i1>, <2 x i32>)
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; This test ensures that masked scatter and gather operations, which take vectors of pointers,
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; do not have pointer aliasing ignored when being processed.
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; No scatter/gather calls should end up eliminated
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; CHECK: llvm.masked.gather
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; CHECK: llvm.masked.gather
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; CHECK: llvm.masked.scatter
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; CHECK: llvm.masked.gather
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; CHECK: llvm.masked.scatter
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; CHECK: llvm.masked.gather
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define spir_kernel void @test(<2 x i32*> %in1, <2 x i32*> %in2, i32* %out) {
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entry:
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; Just some temporary storage
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%tmp.0 = alloca i32
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%tmp.1 = alloca i32
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%tmp.i = insertelement <2 x i32*> undef, i32* %tmp.0, i32 0
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%tmp = insertelement <2 x i32*> %tmp.i, i32* %tmp.1, i32 1
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; Read from in1 and in2
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%in1.v = call <2 x i32> @llvm.masked.gather.v2i32(<2 x i32*> %in1, i32 1, <2 x i1> <i1 true, i1 true>, <2 x i32> undef) #1
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%in2.v = call <2 x i32> @llvm.masked.gather.v2i32(<2 x i32*> %in2, i32 1, <2 x i1> <i1 true, i1 true>, <2 x i32> undef) #1
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; Store in1 to the allocas
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call void @llvm.masked.scatter.v2i32(<2 x i32> %in1.v, <2 x i32*> %tmp, i32 1, <2 x i1> <i1 true, i1 true>);
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; Read in1 from the allocas
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; This gather should alias the scatter we just saw
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%tmp.v.0 = call <2 x i32> @llvm.masked.gather.v2i32(<2 x i32*> %tmp, i32 1, <2 x i1> <i1 true, i1 true>, <2 x i32> undef) #1
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; Store in2 to the allocas
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call void @llvm.masked.scatter.v2i32(<2 x i32> %in2.v, <2 x i32*> %tmp, i32 1, <2 x i1> <i1 true, i1 true>);
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; Read in2 from the allocas
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; This gather should alias the scatter we just saw, and not be eliminated
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%tmp.v.1 = call <2 x i32> @llvm.masked.gather.v2i32(<2 x i32*> %tmp, i32 1, <2 x i1> <i1 true, i1 true>, <2 x i32> undef) #1
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; Store in2 to out for good measure
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%tmp.v.1.0 = extractelement <2 x i32> %tmp.v.1, i32 0
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%tmp.v.1.1 = extractelement <2 x i32> %tmp.v.1, i32 1
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store i32 %tmp.v.1.0, i32* %out
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%out.1 = getelementptr i32, i32* %out, i32 1
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store i32 %tmp.v.1.1, i32* %out.1
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ret void
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}
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