avx-cast.ll
2.6 KB
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-apple-darwin -mattr=+avx | FileCheck %s --check-prefix=AVX --check-prefix=AVX1
; RUN: llc < %s -mtriple=x86_64-apple-darwin -mattr=+avx2 | FileCheck %s --check-prefix=AVX --check-prefix=AVX2
; Prefer a blend instruction to a vinsert128 instruction because blends
; are simpler (no lane changes) and therefore will have equal or better
; performance.
define <8 x float> @castA(<4 x float> %m) nounwind uwtable readnone ssp {
; AVX-LABEL: castA:
; AVX: ## %bb.0:
; AVX-NEXT: vmovaps %xmm0, %xmm0
; AVX-NEXT: retq
%shuffle.i = shufflevector <4 x float> %m, <4 x float> zeroinitializer, <8 x i32> <i32 0, i32 1, i32 2, i32 3, i32 4, i32 4, i32 4, i32 4>
ret <8 x float> %shuffle.i
}
define <4 x double> @castB(<2 x double> %m) nounwind uwtable readnone ssp {
; AVX-LABEL: castB:
; AVX: ## %bb.0:
; AVX-NEXT: vmovaps %xmm0, %xmm0
; AVX-NEXT: retq
%shuffle.i = shufflevector <2 x double> %m, <2 x double> zeroinitializer, <4 x i32> <i32 0, i32 1, i32 2, i32 2>
ret <4 x double> %shuffle.i
}
; AVX2 is needed for integer types.
define <4 x i64> @castC(<2 x i64> %m) nounwind uwtable readnone ssp {
; AVX-LABEL: castC:
; AVX: ## %bb.0:
; AVX-NEXT: vmovaps %xmm0, %xmm0
; AVX-NEXT: retq
%shuffle.i = shufflevector <2 x i64> %m, <2 x i64> zeroinitializer, <4 x i32> <i32 0, i32 1, i32 2, i32 2>
ret <4 x i64> %shuffle.i
}
; The next three tests don't need any shuffling. There may or may not be a
; vzeroupper before the return, so just check for the absence of shuffles.
define <4 x float> @castD(<8 x float> %m) nounwind uwtable readnone ssp {
; AVX-LABEL: castD:
; AVX: ## %bb.0:
; AVX-NEXT: ## kill: def $xmm0 killed $xmm0 killed $ymm0
; AVX-NEXT: vzeroupper
; AVX-NEXT: retq
%shuffle.i = shufflevector <8 x float> %m, <8 x float> %m, <4 x i32> <i32 0, i32 1, i32 2, i32 3>
ret <4 x float> %shuffle.i
}
define <2 x i64> @castE(<4 x i64> %m) nounwind uwtable readnone ssp {
; AVX-LABEL: castE:
; AVX: ## %bb.0:
; AVX-NEXT: ## kill: def $xmm0 killed $xmm0 killed $ymm0
; AVX-NEXT: vzeroupper
; AVX-NEXT: retq
%shuffle.i = shufflevector <4 x i64> %m, <4 x i64> %m, <2 x i32> <i32 0, i32 1>
ret <2 x i64> %shuffle.i
}
define <2 x double> @castF(<4 x double> %m) nounwind uwtable readnone ssp {
; AVX-LABEL: castF:
; AVX: ## %bb.0:
; AVX-NEXT: ## kill: def $xmm0 killed $xmm0 killed $ymm0
; AVX-NEXT: vzeroupper
; AVX-NEXT: retq
%shuffle.i = shufflevector <4 x double> %m, <4 x double> %m, <2 x i32> <i32 0, i32 1>
ret <2 x double> %shuffle.i
}