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If an HVX vector register is to be coalesced into a vector pair, make sure that the vector pair will not have a function call in its live range, unless it already had one. All HVX vector registers are volatile, so any vector register live across a function call will have to be spilled. If a vector needs to be spilled, and it's coalesced into a vector pair then the whole pair will need to be spilled (even if only a part of it is live), taking extra stack space. llvm-svn: 337073
27 lines
1.1 KiB
LLVM
27 lines
1.1 KiB
LLVM
; RUN: llc -march=hexagon < %s | FileCheck %s
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target datalayout = "e-m:e-p:32:32:32-a:0-n16:32-i64:64:64-i32:32:32-i16:16:16-i1:8:8-f32:32:32-f64:64:64-v32:32:32-v64:64:64-v512:512:512-v1024:1024:1024-v2048:2048:2048"
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target triple = "hexagon"
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; Check that this code only spills a single vector.
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; CHECK-NOT: vmem(#r29+{{[^0]}})
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%struct.descr = type opaque
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define inreg <64 x i32> @danny(%struct.descr* %desc, i32 %xy0, i32 %xy1) #0 {
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entry:
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%call = tail call inreg <32 x i32> @sammy(%struct.descr* %desc, i32 %xy0) #3
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%call1 = tail call inreg <32 x i32> @kirby(%struct.descr* %desc, i32 %xy1) #3
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%0 = tail call <64 x i32> @llvm.hexagon.V6.vcombine.128B(<32 x i32> %call1, <32 x i32> %call)
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ret <64 x i32> %0
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}
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declare inreg <32 x i32> @sammy(%struct.descr*, i32) #1
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declare inreg <32 x i32> @kirby(%struct.descr*, i32) #1
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declare <64 x i32> @llvm.hexagon.V6.vcombine.128B(<32 x i32>, <32 x i32>) #2
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attributes #0 = { nounwind "target-cpu"="hexagonv60" "target-features"="+hvx-length128b,+hvxv60" }
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attributes #1 = { "target-cpu"="hexagonv60" "target-features"="+hvx-length128b,+hvxv60" }
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attributes #2 = { nounwind readnone }
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attributes #3 = { nounwind }
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