6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-07-25 13:24:46 +00:00
Code Issues Projects Releases Wiki Activity

[mips] Add an IR transformation pass that optimizes calls to sqrt.

Browse Source 
The pass emits a call to sqrt that has attribute "read-none". This call will be
converted to an ISD::FSQRT node during DAG construction, which will turn into
a mips native sqrt instruction.
 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183802 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka
2013-06-11 22:21:44 +00:00
parent a11c3e2501
commit 45137f954f
4 changed files with 209 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
test/CodeGen/Mips/optimize-fp-math.ll Normal file
View File

@@ -0,0 +1,32 @@
; RUN: llc -march=mipsel < %s | FileCheck %s -check-prefix=32
; RUN: llc -march=mips64el -mcpu=mips64 < %s | FileCheck %s -check-prefix=64
; 32: test_sqrtf_float_:
; 32: sqrt.s $f[[R0:[0-9]+]], $f{{[0-9]+}}
; 32: c.un.s $f[[R0]], $f[[R0]]
; 64: test_sqrtf_float_:
; 64: sqrt.s $f[[R0:[0-9]+]], $f{{[0-9]+}}
; 64: c.un.s $f[[R0]], $f[[R0]]
define float @test_sqrtf_float_(float %a) {
entry:
%call = tail call float @sqrtf(float %a)
ret float %call
}
declare float @sqrtf(float)
; 32: test_sqrt_double_:
; 32: sqrt.d $f[[R0:[0-9]+]], $f{{[0-9]+}}
; 32: c.un.d $f[[R0]], $f[[R0]]
; 64: test_sqrt_double_:
; 64: sqrt.d $f[[R0:[0-9]+]], $f{{[0-9]+}}
; 64: c.un.d $f[[R0]], $f[[R0]]
define double @test_sqrt_double_(double %a) {
entry:
%call = tail call double @sqrt(double %a)
ret double %call
}
declare double @sqrt(double)