Look through phi nodes and select instructions when

calculating nocapture attributes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61535 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 22 insertions, 15 deletions

diff --git a/test/Transforms/FunctionAttrs/2008-12-31-NoCapture.ll b/test/Transforms/FunctionAttrs/2008-12-31-NoCapture.ll
index 6d2ca1e446..86feb4318c 100644
--- a/test/Transforms/FunctionAttrs/2008-12-31-NoCapture.ll
+++ b/test/Transforms/FunctionAttrs/2008-12-31-NoCapture.ll
@@ -1,34 +1,41 @@
-; RUN: llvm-as < %s | opt -functionattrs | llvm-dis | not grep {@c.*nocapture}
-; RUN: llvm-as < %s | opt -functionattrs | llvm-dis | grep nocapture | count 3
+; RUN: llvm-as < %s | opt -functionattrs | llvm-dis | not grep {nocapture *%%q}
+; RUN: llvm-as < %s | opt -functionattrs | llvm-dis | grep {nocapture *%%p} | count 3
 @g = global i32* null		; <i32**> [#uses=1]
 
-define i32* @c1(i32* %p) {
-	ret i32* %p
+define i32* @c1(i32* %q) {
+	ret i32* %q
 }
 
-define void @c2(i32* %p) {
-	store i32* %p, i32** @g
+define void @c2(i32* %q) {
+	store i32* %q, i32** @g
 	ret void
 }
 
-define void @c3(i32* %p) {
-	call void @c2(i32* %p)
+define void @c3(i32* %q) {
+	call void @c2(i32* %q)
 	ret void
 }
 
-define i32 @nc1(i32* %p) {
-	%tmp = bitcast i32* %p to i32*		; <i32*> [#uses=2]
-	%val = load i32* %tmp		; <i32> [#uses=1]
+define i32 @nc1(i32* %q, i32* %p, i1 %b) {
+e:
+	br label %l
+l:
+	%x = phi i32* [ %p, %e ]
+	%y = phi i32* [ %q, %e ]
+	%tmp = bitcast i32* %x to i32*		; <i32*> [#uses=2]
+	%tmp2 = select i1 %b, i32* %tmp, i32* %y
+	%val = load i32* %tmp2		; <i32> [#uses=1]
 	store i32 0, i32* %tmp
+	store i32* %y, i32** @g
 	ret i32 %val
 }
 
-define void @nc2(i32* %p) {
-	%1 = call i32 @nc1(i32* %p)		; <i32> [#uses=0]
+define void @nc2(i32* %p, i32* %q) {
+	%1 = call i32 @nc1(i32* %q, i32* %p, i1 0)		; <i32> [#uses=0]
 	ret void
 }
 
-define void @nc3(void ()* %f) {
-	call void %f()
+define void @nc3(void ()* %p) {
+	call void %p()
 	ret void
 }