Implement strip.invariant.group

Summary:
This patch introduce new intrinsic -
strip.invariant.group that was described in the
RFC: Devirtualization v2

Reviewers: rsmith, hfinkel, nlopes, sanjoy, amharc, kuhar

Subscribers: arsenm, nhaehnle, JDevlieghere, hiraditya, xbolva00, llvm-commits

Differential Revision: https://reviews.llvm.org/D47103

Co-authored-by: Krzysztof Pszeniczny <krzysztof.pszeniczny@gmail.com>
llvm-svn: 336073

1 files changed, 10 insertions, 10 deletions

diff --git a/llvm/test/Transforms/GlobalOpt/invariant.group.barrier.ll b/llvm/test/Transforms/GlobalOpt/invariant.group.ll
index 9ae7e78b785..8a090cbd0d3 100644
--- a/llvm/test/Transforms/GlobalOpt/invariant.group.barrier.ll
+++ b/llvm/test/Transforms/GlobalOpt/invariant.group.ll
@@ -27,15 +27,15 @@ enter:
 define void @_optimizable() {
 enter:
   %valptr = alloca i32
-  
+
   %val = call i32 @TheAnswerToLifeTheUniverseAndEverything()
   store i32 %val, i32* @tmp
   store i32 %val, i32* %valptr
-  
+
   %0 = bitcast i32* %valptr to i8*
   %barr = call i8* @llvm.launder.invariant.group(i8* %0)
   %1 = bitcast i8* %barr to i32*
-  
+
   %val2 = load i32, i32* %1
   store i32 %val2, i32* @tmp2
   ret void
@@ -43,30 +43,30 @@ enter:
 
 ; We can't step through launder.invariant.group here, because that would change
 ; this load in @usage_of_globals()
-; val = load i32, i32* %ptrVal, !invariant.group !0 
-; into 
+; val = load i32, i32* %ptrVal, !invariant.group !0
+; into
 ; %val = load i32, i32* @tmp3, !invariant.group !0
-; and then we could assume that %val and %val2 to be the same, which coud be 
+; and then we could assume that %val and %val2 to be the same, which coud be
 ; false, because @changeTmp3ValAndCallBarrierInside() may change the value
 ; of @tmp3.
 define void @_not_optimizable() {
 enter:
   store i32 13, i32* @tmp3, !invariant.group !0
-  
+
   %0 = bitcast i32* @tmp3 to i8*
   %barr = call i8* @llvm.launder.invariant.group(i8* %0)
   %1 = bitcast i8* %barr to i32*
-  
+
   store i32* %1, i32** @ptrToTmp3
   store i32 42, i32* %1, !invariant.group !0
-  
+
   ret void
 }
 define void @usage_of_globals() {
 entry:
   %ptrVal = load i32*, i32** @ptrToTmp3
   %val = load i32, i32* %ptrVal, !invariant.group !0
-  
+
   call void @changeTmp3ValAndCallBarrierInside()
   %val2 = load i32, i32* @tmp3, !invariant.group !0
   ret void;