70 lines
2.4 KiB
LLVM
70 lines
2.4 KiB
LLVM
; RUN: llc < %s -verify-machineinstrs -mtriple=aarch64-none-linux-gnu -mattr=+neon | FileCheck %s
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; RUN: llc < %s -O3 -verify-machineinstrs -mtriple=aarch64-none-linux-gnu -mattr=+neon | FileCheck %s
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define <2 x float> @fma_1(<2 x float> %A, <2 x float> %B, <2 x float> %C) {
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; CHECK-LABEL: fma_1:
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; CHECK: fmla {{v[0-9]+}}.2s, {{v[0-9]+}}.2s, {{v[0-9]+}}.2s
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%tmp1 = fmul contract <2 x float> %A, %B;
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%tmp2 = fadd contract <2 x float> %C, %tmp1;
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ret <2 x float> %tmp2
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}
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; This case will fold as it was only available through unsafe before, now available from
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; the contract on the fadd
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define <2 x float> @fma_2(<2 x float> %A, <2 x float> %B, <2 x float> %C) {
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; CHECK-LABEL: fma_2:
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; CHECK: fmla {{v[0-9]+}}.2s, {{v[0-9]+}}.2s, {{v[0-9]+}}.2s
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%tmp1 = fmul <2 x float> %A, %B;
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%tmp2 = fadd contract <2 x float> %C, %tmp1;
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ret <2 x float> %tmp2
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}
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define <2 x float> @no_fma_1(<2 x float> %A, <2 x float> %B, <2 x float> %C) {
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; CHECK-LABEL: no_fma_1:
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; CHECK: fmul
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; CHECK: fadd
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%tmp1 = fmul contract <2 x float> %A, %B;
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%tmp2 = fadd <2 x float> %C, %tmp1;
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ret <2 x float> %tmp2
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}
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define <2 x float> @fma_sub_1(<2 x float> %A, <2 x float> %B, <2 x float> %C) {
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; CHECK-LABEL: fma_sub_1:
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; CHECK: fmls {{v[0-9]+}}.2s, {{v[0-9]+}}.2s, {{v[0-9]+}}.2s
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%tmp1 = fmul contract <2 x float> %A, %B;
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%tmp2 = fsub contract <2 x float> %C, %tmp1;
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ret <2 x float> %tmp2
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}
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; This case will fold as it was only available through unsafe before, now available from
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; the contract on the fsub
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define <2 x float> @fma_sub_2(<2 x float> %A, <2 x float> %B, <2 x float> %C) {
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; CHECK-LABEL: fma_sub_2:
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; CHECK: fmls {{v[0-9]+}}.2s, {{v[0-9]+}}.2s, {{v[0-9]+}}.2s
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%tmp1 = fmul <2 x float> %A, %B;
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%tmp2 = fsub contract <2 x float> %C, %tmp1;
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ret <2 x float> %tmp2
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}
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define <2 x float> @no_fma_sub_1(<2 x float> %A, <2 x float> %B, <2 x float> %C) {
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; CHECK-LABEL: no_fma_sub_1:
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; CHECK: fmul
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; CHECK: fsub
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%tmp1 = fmul contract <2 x float> %A, %B;
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%tmp2 = fsub <2 x float> %C, %tmp1;
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ret <2 x float> %tmp2
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}
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; Regression test: contract FMF allows folding (A * 0 + B) to FMA(A, 0, B), but
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; reassoc FMF must not allow further folding to just (B) without additional
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; FMFs (ninf, nnan)
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define float @fma_zero(float %A, float %B) {
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; CHECK-LABEL: fma_zero:
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; CHECK: // %bb.0:
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; CHECK-NEXT: movi d2, #0000000000000000
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; CHECK-NEXT: fmadd s0, s0, s2, s1
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; CHECK-NEXT: ret
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%tmp1 = fmul contract reassoc float %A, 0.0e+0;
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%tmp2 = fadd contract reassoc float %B, %tmp1;
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ret float %tmp2
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}
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