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| author | Sanjay Patel <spatel@rotateright.com> | 2015-06-02 15:28:15 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2015-06-02 15:28:15 +0000 |
| commit | 6f031d848efb9dba1865a3884286ce660845a255 (patch) | |
| tree | 71bb75117d6a0759d8518e6ee00e6bb15b786706 /llvm/test/CodeGen/X86/recip-fastmath.ll | |
| parent | 199d0c9e764e69895d3d79553696de514be31ad2 (diff) | |
| download | bcm5719-llvm-6f031d848efb9dba1865a3884286ce660845a255.tar.gz bcm5719-llvm-6f031d848efb9dba1865a3884286ce660845a255.zip | |
make reciprocal estimate code generation more flexible by adding command-line options (2nd try)
The first try (r238051) to land this was reverted due to bot failures
that were hopefully addressed by r238788.
This patch adds a TargetRecip class for processing many recip codegen possibilities.
The class is intended to handle both command-line options to llc as well
as options passed in from a front-end such as clang with the -mrecip option.
The x86 backend is updated to use the new functionality.
Only -mcpu=btver2 with -ffast-math should see a functional change from this patch.
All other x86 CPUs continue to *not* use reciprocal estimates by default with -ffast-math.
Differential Revision: http://reviews.llvm.org/D8982
llvm-svn: 238842
Diffstat (limited to 'llvm/test/CodeGen/X86/recip-fastmath.ll')
| -rw-r--r-- | llvm/test/CodeGen/X86/recip-fastmath.ll | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/llvm/test/CodeGen/X86/recip-fastmath.ll b/llvm/test/CodeGen/X86/recip-fastmath.ll index fcd077092da..7f1521a83bc 100644 --- a/llvm/test/CodeGen/X86/recip-fastmath.ll +++ b/llvm/test/CodeGen/X86/recip-fastmath.ll @@ -1,6 +1,6 @@ ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=sse2 | FileCheck %s -; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=avx,use-recip-est | FileCheck %s --check-prefix=RECIP -; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=avx,use-recip-est -x86-recip-refinement-steps=2 | FileCheck %s --check-prefix=REFINE +; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=avx -recip=divf,vec-divf | FileCheck %s --check-prefix=RECIP +; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=avx -recip=divf:2,vec-divf:2 | FileCheck %s --check-prefix=REFINE ; If the target's divss/divps instructions are substantially ; slower than rcpss/rcpps with a Newton-Raphson refinement, |
