From 45137f954f976ea75282f7b4b2dac5777837840f Mon Sep 17 00:00:00 2001
From: Akira Hatanaka <ahatanaka@mips.com>
Date: Tue, 11 Jun 2013 22:21:44 +0000
Subject: [mips] Add an IR transformation pass that optimizes calls to sqrt.

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
---
 test/CodeGen/Mips/optimize-fp-math.ll | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 test/CodeGen/Mips/optimize-fp-math.ll

(limited to 'test/CodeGen/Mips/optimize-fp-math.ll')

diff --git a/test/CodeGen/Mips/optimize-fp-math.ll b/test/CodeGen/Mips/optimize-fp-math.ll
new file mode 100644
index 00000000000..9348d3c8f12
--- /dev/null
+++ b/test/CodeGen/Mips/optimize-fp-math.ll
@@ -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)
-- 
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