llvm-mirror/test/CodeGen/AArch64/neon-fma-FMF.ll
Michael Berg 2600a27111 Utilize new SDNode flag functionality to expand current support for fma
Summary: This patch originated from D47388 and is a proper subset of the originating changes, containing only the fmf optimization guard extensions.

Reviewers: spatel, hfinkel, wristow, arsenm, javed.absar, rampitec, nhaehnle, nemanjai

Reviewed By: rampitec, nhaehnle

Subscribers: tpr, nemanjai, wdng

Differential Revision: https://reviews.llvm.org/D47918

llvm-svn: 334876
2018-06-16 00:03:06 +00:00

56 lines
1.9 KiB
LLVM

; RUN: llc < %s -verify-machineinstrs -mtriple=aarch64-none-linux-gnu -mattr=+neon | FileCheck %s
define <2 x float> @fma_1(<2 x float> %A, <2 x float> %B, <2 x float> %C) {
; CHECK-LABEL: fma_1:
; CHECK: fmla {{v[0-9]+}}.2s, {{v[0-9]+}}.2s, {{v[0-9]+}}.2s
%tmp1 = fmul contract <2 x float> %A, %B;
%tmp2 = fadd contract <2 x float> %C, %tmp1;
ret <2 x float> %tmp2
}
; This case will fold as it was only available through unsafe before, now available from
; the contract on the fadd
define <2 x float> @fma_2(<2 x float> %A, <2 x float> %B, <2 x float> %C) {
; CHECK-LABEL: fma_2:
; CHECK: fmla {{v[0-9]+}}.2s, {{v[0-9]+}}.2s, {{v[0-9]+}}.2s
%tmp1 = fmul <2 x float> %A, %B;
%tmp2 = fadd contract <2 x float> %C, %tmp1;
ret <2 x float> %tmp2
}
define <2 x float> @no_fma_1(<2 x float> %A, <2 x float> %B, <2 x float> %C) {
; CHECK-LABEL: no_fma_1:
; CHECK: fmul
; CHECK: fadd
%tmp1 = fmul contract <2 x float> %A, %B;
%tmp2 = fadd <2 x float> %C, %tmp1;
ret <2 x float> %tmp2
}
define <2 x float> @fma_sub_1(<2 x float> %A, <2 x float> %B, <2 x float> %C) {
; CHECK-LABEL: fma_sub_1:
; CHECK: fmls {{v[0-9]+}}.2s, {{v[0-9]+}}.2s, {{v[0-9]+}}.2s
%tmp1 = fmul contract <2 x float> %A, %B;
%tmp2 = fsub contract <2 x float> %C, %tmp1;
ret <2 x float> %tmp2
}
; This case will fold as it was only available through unsafe before, now available from
; the contract on the fsub
define <2 x float> @fma_sub_2(<2 x float> %A, <2 x float> %B, <2 x float> %C) {
; CHECK-LABEL: fma_sub_2:
; CHECK: fmls {{v[0-9]+}}.2s, {{v[0-9]+}}.2s, {{v[0-9]+}}.2s
%tmp1 = fmul <2 x float> %A, %B;
%tmp2 = fsub contract <2 x float> %C, %tmp1;
ret <2 x float> %tmp2
}
define <2 x float> @no_fma_sub_1(<2 x float> %A, <2 x float> %B, <2 x float> %C) {
; CHECK-LABEL: no_fma_sub_1:
; CHECK: fmul
; CHECK: fsub
%tmp1 = fmul contract <2 x float> %A, %B;
%tmp2 = fsub <2 x float> %C, %tmp1;
ret <2 x float> %tmp2
}