From f70661c84344a12c647afc91da03fef252ae43f2 Mon Sep 17 00:00:00 2001
From: Sanjay Patel <spatel@rotateright.com>
Date: Tue, 12 Jan 2016 16:50:17 +0000
Subject: [PATCH] Add/edit tests to include instruction-level FMF on calls
 Prepatory patch before changing LibCallSimplifier to use the FMF. Also,
 tighten the CHECK lines and give the tests more meaningful names. Similar
 changes to: http://reviews.llvm.org/rL257414

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@257481 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/Transforms/InstCombine/pow-exp.ll | 44 ++++++++++++++++----------
 1 file changed, 28 insertions(+), 16 deletions(-)

diff --git a/test/Transforms/InstCombine/pow-exp.ll b/test/Transforms/InstCombine/pow-exp.ll
index acc512734ec..7e36eadb402 100644
--- a/test/Transforms/InstCombine/pow-exp.ll
+++ b/test/Transforms/InstCombine/pow-exp.ll
@@ -1,28 +1,40 @@
 ; RUN: opt < %s -instcombine -S | FileCheck %s
 
-define double @mypow(double %x, double %y) #0 {
-entry:
+define double @pow_exp(double %x, double %y) #0 {
+  %call = call fast double @exp(double %x) #0
+  %pow = call fast double @llvm.pow.f64(double %call, double %y)
+  ret double %pow
+}
+
+; CHECK-LABEL: define double @pow_exp(
+; CHECK-NEXT:  %mul = fmul fast double %x, %y
+; CHECK-NEXT:  %exp = call fast double @exp(double %mul)
+; CHECK-NEXT:  ret double %exp
+
+; FIXME: This should not be transformed because the 'exp' call is not fast.
+define double @pow_exp_not_fast(double %x, double %y) #0 {
   %call = call double @exp(double %x)
-  %pow = call double @llvm.pow.f64(double %call, double %y)
+  %pow = call fast double @llvm.pow.f64(double %call, double %y)
   ret double %pow
 }
 
-; CHECK-LABEL: define double @mypow(
-; CHECK:   %mul = fmul fast double %x, %y
-; CHECK:   %exp = call fast double @exp(double %mul) #0
-; CHECK:   ret double %exp
-; CHECK: }
+; CHECK-LABEL: define double @pow_exp_not_fast(
+; CHECK-NEXT:  %call = call double @exp(double %x)
+; CHECK-NEXT:  %mul = fmul fast double %x, %y
+; CHECK-NEXT:  %exp = call fast double @exp(double %mul)
+; CHECK-NEXT:  ret double %exp
 
-define double @test2(double ()* %fptr, double %p1) #0 {
-  %call1 = call double %fptr()
-  %pow = call double @llvm.pow.f64(double %call1, double %p1)
+define double @function_pointer(double ()* %fptr, double %p1) #0 {
+  %call1 = call fast double %fptr()
+  %pow = call fast double @llvm.pow.f64(double %call1, double %p1)
   ret double %pow
 }
 
-; CHECK-LABEL: @test2
-; CHECK: llvm.pow.f64
+; CHECK-LABEL: @function_pointer
+; CHECK-NEXT:  %call1 = call fast double %fptr()
+; CHECK-NEXT:  %pow = call fast double @llvm.pow.f64(double %call1, double %p1)
 
-declare double @exp(double) #1
+declare double @exp(double)
 declare double @llvm.pow.f64(double, double)
-attributes #0 = { "unsafe-fp-math"="true" }
-attributes #1 = { "unsafe-fp-math"="true" }
+attributes #0 = { "unsafe-fp-math"="true" nounwind readnone }
+
-- 
2.34.1