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llvm-mirror/test/CodeGen/ARM/neon_div.ll
Andrew Trick 916e01c917 Recommit r129383. PreRA scheduler heuristic fixes: VRegCycle, TokenFactor latency.
Additional fixes:
Do something reasonable for subtargets with generic
itineraries by handle node latency the same as for an empty
itinerary. Now nodes default to unit latency unless an itinerary
explicitly specifies a zero cycle stage or it is a TokenFactor chain.

Original fixes:
UnitsSharePred was a source of randomness in the scheduler: node
priority depended on the queue data structure. I rewrote the recent
VRegCycle heuristics to completely replace the old heuristic without
any randomness. To make the ndoe latency adjustments work, I also
needed to do something a little more reasonable with TokenFactor. I
gave it zero latency to its consumers and always schedule it as low as
possible.

llvm-svn: 129421
2011-04-13 00:38:32 +00:00

49 lines
1.1 KiB
LLVM

; RUN: llc < %s -march=arm -mattr=+neon -pre-RA-sched=source | FileCheck %s
define <8 x i8> @sdivi8(<8 x i8>* %A, <8 x i8>* %B) nounwind {
;CHECK: vrecpe.f32
;CHECK: vrecpe.f32
;CHECK: vmovn.i32
;CHECK: vmovn.i32
;CHECK: vmovn.i16
%tmp1 = load <8 x i8>* %A
%tmp2 = load <8 x i8>* %B
%tmp3 = sdiv <8 x i8> %tmp1, %tmp2
ret <8 x i8> %tmp3
}
define <8 x i8> @udivi8(<8 x i8>* %A, <8 x i8>* %B) nounwind {
;CHECK: vrecpe.f32
;CHECK: vrecps.f32
;CHECK: vrecpe.f32
;CHECK: vrecps.f32
;CHECK: vmovn.i32
;CHECK: vmovn.i32
;CHECK: vqmovun.s16
%tmp1 = load <8 x i8>* %A
%tmp2 = load <8 x i8>* %B
%tmp3 = udiv <8 x i8> %tmp1, %tmp2
ret <8 x i8> %tmp3
}
define <4 x i16> @sdivi16(<4 x i16>* %A, <4 x i16>* %B) nounwind {
;CHECK: vrecpe.f32
;CHECK: vrecps.f32
;CHECK: vmovn.i32
%tmp1 = load <4 x i16>* %A
%tmp2 = load <4 x i16>* %B
%tmp3 = sdiv <4 x i16> %tmp1, %tmp2
ret <4 x i16> %tmp3
}
define <4 x i16> @udivi16(<4 x i16>* %A, <4 x i16>* %B) nounwind {
;CHECK: vrecpe.f32
;CHECK: vrecps.f32
;CHECK: vrecps.f32
;CHECK: vmovn.i32
%tmp1 = load <4 x i16>* %A
%tmp2 = load <4 x i16>* %B
%tmp3 = udiv <4 x i16> %tmp1, %tmp2
ret <4 x i16> %tmp3
}