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43 lines
2.1 KiB
LLVM
43 lines
2.1 KiB
LLVM
; RUN: opt < %s -basicaa -gvn -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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