[SimplifyLibCalls] Removed some TODOs which are already implemented. NFC.

Summary:
D14302 implements tan(atan(x)) -> x
D14045 implements pow(exp(x), y) -> exp(x*y)

Patch by Mandeep Singh Grang <mgrang@codeaurora.org>

Reviewers: majnemer, davide

Differential Revision: http://reviews.llvm.org/D14882

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@253768 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Utils/SimplifyLibCalls.cpp b/lib/Transforms/Utils/SimplifyLibCalls.cpp
index 91c56c2e231fbde13a9fe544e29257af328fdb05..94decae856230390e01ae7e0bab225f15d420e86 100644 (file)
--- a/lib/Transforms/Utils/SimplifyLibCalls.cpp
+++ b/lib/Transforms/Utils/SimplifyLibCalls.cpp
@@ -2273,7 +2273,6 @@ void LibCallSimplifier::replaceAllUsesWith(Instruction *I, Value *With) {
 //   * lround(cnst) -> cnst'
 //
 // pow, powf, powl:
-//   * pow(exp(x),y)  -> exp(x*y)
 //   * pow(sqrt(x),y) -> pow(x,y*0.5)
 //   * pow(pow(x,y),z)-> pow(x,y*z)
 //
@@ -2289,9 +2288,6 @@ void LibCallSimplifier::replaceAllUsesWith(Instruction *I, Value *With) {
 //   * sqrt(Nroot(x)) -> pow(x,1/(2*N))
 //   * sqrt(pow(x,y)) -> pow(|x|,y*0.5)
 //
-// tan, tanf, tanl:
-//   * tan(atan(x)) -> x
-//
 // trunc, truncf, truncl:
 //   * trunc(cnst) -> cnst'
 //