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On Darwin targets, only use vfma etc. if the source use fma() intrinsic explicitly.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154689 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2012-04-13 18:59:28 +00:00
parent d6bf201fa2
commit 7ece9539c2
2 changed files with 6 additions and 3 deletions
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7
lib/Target/ARM/ARMInstrInfo.td
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@ -219,8 +219,11 @@ def UseFPVMLx : Predicate<"Subtarget->useFPVMLx()">;
// Prefer fused MAC for fp mul + add over fp VMLA / VMLS if they are available.
// But only select them if more precision in FP computation is allowed.
def UseFusedMAC : Predicate<"!TM.Options.NoExcessFPPrecision">;
def DontUseFusedMAC : Predicate<"!Subtarget->hasVFP4()">;
// Do not use them for Darwin platforms.
def UseFusedMAC : Predicate<"!TM.Options.NoExcessFPPrecision && "
"!Subtarget->isTargetDarwin()">;
def DontUseFusedMAC : Predicate<"!Subtarget->hasVFP4() || "
"Subtarget->isTargetDarwin()">;
//===----------------------------------------------------------------------===//
// ARM Flag Definitions.

2
test/CodeGen/ARM/fusedMAC.ll
View File

@ -1,4 +1,4 @@
; RUN: llc < %s -march=arm -mattr=+neon,+vfp4 | FileCheck %s
; RUN: llc < %s -mtriple=armv7-eabi -mattr=+neon,+vfp4 | FileCheck %s
; Check generated fused MAC and MLS.
define double @fusedMACTest1(double %d1, double %d2, double %d3) {