Add unnamed_addr when we can show that address of a global is not used.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123834 91177308-0d34-0410-b5e6-96231b3b80d8

6 files changed, 61 insertions, 7 deletions

diff --git a/test/Transforms/GlobalOpt/2008-04-26-SROA-Global-Align.ll b/test/Transforms/GlobalOpt/2008-04-26-SROA-Global-Align.ll
index cfc9f30..5b06fea 100644
--- a/test/Transforms/GlobalOpt/2008-04-26-SROA-Global-Align.ll
+++ b/test/Transforms/GlobalOpt/2008-04-26-SROA-Global-Align.ll
@@ -2,9 +2,9 @@
 ; alignments.  Elements 0 and 2 must be 16-byte aligned, and element 
 ; 1 must be at least 8 byte aligned (but could be more). 
 
-; RUN: opt < %s -globalopt -S | grep {@G.0 = internal global .*align 16}
-; RUN: opt < %s -globalopt -S | grep {@G.1 = internal global .*align 8}
-; RUN: opt < %s -globalopt -S | grep {@G.2 = internal global .*align 16}
+; RUN: opt < %s -globalopt -S | grep {@G.0 = internal unnamed_addr global .*align 16}
+; RUN: opt < %s -globalopt -S | grep {@G.1 = internal unnamed_addr global .*align 8}
+; RUN: opt < %s -globalopt -S | grep {@G.2 = internal unnamed_addr global .*align 16}
 ; rdar://5891920
 
 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:32:32-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
diff --git a/test/Transforms/GlobalOpt/2009-03-07-PromotePtrToBool.ll b/test/Transforms/GlobalOpt/2009-03-07-PromotePtrToBool.ll
index e024fc2..d645ce4 100644
--- a/test/Transforms/GlobalOpt/2009-03-07-PromotePtrToBool.ll
+++ b/test/Transforms/GlobalOpt/2009-03-07-PromotePtrToBool.ll
@@ -1,4 +1,4 @@
-; RUN: opt < %s -globalopt -S | grep {@X = internal global i32}
+; RUN: opt < %s -globalopt -S | grep {@X = internal unnamed_addr global i32}
 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
 target triple = "i386-apple-darwin7"
 @X = internal global i32* null		; <i32**> [#uses=2]
diff --git a/test/Transforms/GlobalOpt/2009-11-16-MallocSingleStoreToGlobalVar.ll b/test/Transforms/GlobalOpt/2009-11-16-MallocSingleStoreToGlobalVar.ll
index c43565a..b73f62b 100644
--- a/test/Transforms/GlobalOpt/2009-11-16-MallocSingleStoreToGlobalVar.ll
+++ b/test/Transforms/GlobalOpt/2009-11-16-MallocSingleStoreToGlobalVar.ll
@@ -8,7 +8,7 @@ target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f3
 target triple = "x86_64-apple-darwin10.0"
 
 @TOP = internal global i64* null                    ; <i64**> [#uses=2]
-; CHECK: @TOP = internal global i64* null
+; CHECK: @TOP = internal unnamed_addr global i64* null
 @channelColumns = internal global i64 0             ; <i64*> [#uses=2]
 
 ; Derived from @DescribeChannel() in yacr2
diff --git a/test/Transforms/GlobalOpt/globalsra-unknown-index.ll b/test/Transforms/GlobalOpt/globalsra-unknown-index.ll
index 9397a12..1e0db6a 100644
--- a/test/Transforms/GlobalOpt/globalsra-unknown-index.ll
+++ b/test/Transforms/GlobalOpt/globalsra-unknown-index.ll
@@ -1,5 +1,5 @@
 ; RUN: opt < %s -globalopt -S > %t
-; RUN: grep {@Y = internal global \\\[3 x \[%\]struct.X\\\] zeroinitializer} %t
+; RUN: grep {@Y = internal unnamed_addr global \\\[3 x \[%\]struct.X\\\] zeroinitializer} %t
 ; RUN: grep load %t | count 6
 ; RUN: grep {add i32 \[%\]a, \[%\]b} %t | count 3
 
diff --git a/test/Transforms/GlobalOpt/memcpy.ll b/test/Transforms/GlobalOpt/memcpy.ll
index 335f5ec..8f063a2 100644
--- a/test/Transforms/GlobalOpt/memcpy.ll
+++ b/test/Transforms/GlobalOpt/memcpy.ll
@@ -1,5 +1,5 @@
 ; RUN: opt < %s -globalopt -S | \
-; RUN:   grep {G1 = internal constant}
+; RUN:   grep {G1 = internal unnamed_addr constant}
 
 @G1 = internal global [58 x i8] c"asdlfkajsdlfkajsd;lfkajds;lfkjasd;flkajsd;lkfja;sdlkfjasd\00"         ; <[58 x i8]*> [#uses=1]
 
diff --git a/test/Transforms/GlobalOpt/unnamed-addr.ll b/test/Transforms/GlobalOpt/unnamed-addr.ll
new file mode 100644
index 0000000..be02821
--- /dev/null
+++ b/test/Transforms/GlobalOpt/unnamed-addr.ll
@@ -0,0 +1,54 @@
+; RUN: opt %s -globalopt -S | FileCheck %s
+
+@a = internal global i32 0, align 4
+@b = internal global i32 0, align 4
+@c = internal global i32 0, align 4
+@d = internal constant [4 x i8] c"foo\00", align 1
+
+; CHECK: @a = internal global i32 0, align 4
+; CHECK: @b = internal global i32 0, align 4
+; CHECK: @c = internal unnamed_addr global i32 0, align 4
+; CHECK: @d = internal unnamed_addr constant [4 x i8] c"foo\00", align 1
+
+define i1 @bah(i64 %i) nounwind readonly optsize ssp {
+entry:
+  %arrayidx4 = getelementptr inbounds [4 x i8]* @d, i64 0, i64 %i
+  %tmp5 = load i8* %arrayidx4, align 1
+  %cmp = icmp eq i8 %tmp5, 42
+  ret i1 %cmp
+}
+
+define void @baz(i32 %x) {
+entry:
+  store i32 %x, i32* @a, align 4
+  store i32 %x, i32* @b, align 4
+  store i32 %x, i32* @c, align 4
+  ret void
+}
+
+define i32 @foo(i32* %x) nounwind readnone optsize ssp {
+entry:
+  %cmp = icmp eq i32* %x, @a
+  %conv = zext i1 %cmp to i32
+  ret i32 %conv
+}
+
+define i32 @bar() {
+entry:
+  switch i64 ptrtoint (i32* @b to i64), label %sw.epilog [
+    i64 1, label %return
+    i64 0, label %return
+  ]
+
+sw.epilog:
+  ret i32 0
+
+return:
+  ret i32 1
+}
+
+define i32 @zed() {
+entry:
+  %tmp1 = load i32* @c, align 4
+  ret i32 %tmp1
+}