Rename -allow-excess-fp-precision flag to -fuse-fp-ops, and switch from a

boolean flag to an enum: { Fast, Standard, Strict } (default = Standard).

This option controls the creation by optimizations of fused FP ops that store
intermediate results in higher precision than IEEE allows (E.g. FMAs). The
behavior of this option is intended to match the behaviour specified by a
soon-to-be-introduced frontend flag: '-ffuse-fp-ops'.

Fast mode - allows formation of fused FP ops whenever they're profitable.

Standard mode - allow fusion only for 'blessed' FP ops. At present the only
blessed op is the fmuladd intrinsic. In the future more blessed ops may be
added.

Strict mode - allow fusion only if/when it can be proven that the excess
precision won't effect the result.

Note: This option only controls formation of fused ops by the optimizers.  Fused
operations that are explicitly requested (e.g. FMA via the llvm.fma.* intrinsic)
will always be honored, regardless of the value of this option.

Internally TargetOptions::AllowExcessFPPrecision has been replaced by
TargetOptions::AllowFPOpFusion.

llvm-svn: 158956

4 files changed, 4 insertions, 4 deletions

diff --git a/llvm/test/CodeGen/ARM/fusedMAC.ll b/llvm/test/CodeGen/ARM/fusedMAC.ll
index 0cc1cddf218..725dd274e37 100644
--- a/llvm/test/CodeGen/ARM/fusedMAC.ll
+++ b/llvm/test/CodeGen/ARM/fusedMAC.ll
@@ -1,4 +1,4 @@
-; RUN: llc < %s -mtriple=armv7-eabi -mattr=+neon,+vfp4 -enable-excess-fp-precision | FileCheck %s
+; RUN: llc < %s -mtriple=armv7-eabi -mattr=+neon,+vfp4 -fuse-fp-ops=fast | FileCheck %s
 ; Check generated fused MAC and MLS.
 
 define double @fusedMACTest1(double %d1, double %d2, double %d3) {
diff --git a/llvm/test/CodeGen/PowerPC/a2-fp-basic.ll b/llvm/test/CodeGen/PowerPC/a2-fp-basic.ll
index a47e662cc87..a4370fa452a 100644
--- a/llvm/test/CodeGen/PowerPC/a2-fp-basic.ll
+++ b/llvm/test/CodeGen/PowerPC/a2-fp-basic.ll
@@ -1,4 +1,4 @@
-; RUN: llc < %s -march=ppc64 -mcpu=a2 -enable-excess-fp-precision | FileCheck %s
+; RUN: llc < %s -march=ppc64 -mcpu=a2 -fuse-fp-ops=fast | FileCheck %s
 
 %0 = type { double, double }
 
diff --git a/llvm/test/CodeGen/PowerPC/fma.ll b/llvm/test/CodeGen/PowerPC/fma.ll
index 02847147edb..4e05c279b79 100644
--- a/llvm/test/CodeGen/PowerPC/fma.ll
+++ b/llvm/test/CodeGen/PowerPC/fma.ll
@@ -1,4 +1,4 @@
-; RUN: llc < %s -march=ppc32 -enable-excess-fp-precision | \
+; RUN: llc < %s -march=ppc32 -fuse-fp-ops=fast | \
 ; RUN:   egrep {fn?madd|fn?msub} | count 8
 
 define double @test_FMADD1(double %A, double %B, double %C) {
diff --git a/llvm/test/CodeGen/PowerPC/ppc440-fp-basic.ll b/llvm/test/CodeGen/PowerPC/ppc440-fp-basic.ll
index 25ec5f892c5..6884570a8aa 100644
--- a/llvm/test/CodeGen/PowerPC/ppc440-fp-basic.ll
+++ b/llvm/test/CodeGen/PowerPC/ppc440-fp-basic.ll
@@ -1,4 +1,4 @@
-; RUN: llc < %s -march=ppc32 -mcpu=440 -enable-excess-fp-precision | FileCheck %s
+; RUN: llc < %s -march=ppc32 -mcpu=440 -fuse-fp-ops=fast | FileCheck %s
 
 %0 = type { double, double }