Re-implement r122936 with proper target hooks. Now getMaxStoresPerMemcpy

etc. takes an option OptSize. If OptSize is true, it would return
the inline limit for functions with attribute OptSize.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122952 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 48 insertions, 24 deletions

diff --git a/test/CodeGen/X86/2010-06-25-CoalescerSubRegDefDead.ll b/test/CodeGen/X86/2010-06-25-CoalescerSubRegDefDead.ll
index c6421a2..6db3ce1 100644
--- a/test/CodeGen/X86/2010-06-25-CoalescerSubRegDefDead.ll
+++ b/test/CodeGen/X86/2010-06-25-CoalescerSubRegDefDead.ll
@@ -1,4 +1,4 @@
-; RUN: llc -O1 -mtriple=x86_64-apple-darwin10 -relocation-model=pic -disable-fp-elim < %s | FileCheck %s
+; RUN: llc -O1 -mtriple=x86_64-unknown-linux-gnu -relocation-model=pic -disable-fp-elim < %s | FileCheck %s
 ; <rdar://problem/8124405>
 
 %struct.type = type { %struct.subtype*, i32, i8, i32, i8, i32, i32, i32, i32, i32, i8, i32, i32, i32, i32, i32, [256 x i32], i32, [257 x i32], [257 x i32], i32*, i16*, i8*, i32, i32, i32, i32, i32, [256 x i8], [16 x i8], [256 x i8], [4096 x i8], [16 x i32], [18002 x i8], [18002 x i8], [6 x [258 x i8]], [6 x [258 x i32]], [6 x [258 x i32]], [6 x [258 x i32]], [6 x i32], i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32*, i32*, i32* }
@@ -21,9 +21,9 @@ bb:
 ; statement. It can be an ADD or LEA instruction, it's not important which one
 ; it is.
 ;
-;      CHECK: ## %bb
-; CHECK-NEXT: addq $64036, %rdi
-;      CHECK: rep;stosl
+; CHECK: # %bb
+; CHECK: addq $64036, %rdi
+; CHECK: rep;stosl
 
   %tmp5 = bitcast i32* %tmp4 to i8*
   call void @llvm.memset.p0i8.i64(i8* %tmp5, i8 0, i64 84, i32 4, i1 false)
diff --git a/test/CodeGen/X86/memcpy.ll b/test/CodeGen/X86/memcpy.ll
index 7bc31be..72342cb 100644
--- a/test/CodeGen/X86/memcpy.ll
+++ b/test/CodeGen/X86/memcpy.ll
@@ -1,4 +1,5 @@
-; RUN: llc < %s -march=x86-64 | FileCheck %s
+; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu | FileCheck %s -check-prefix=LINUX
+; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s -check-prefix=DARWIN
 
 declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
 
@@ -9,8 +10,8 @@ entry:
 	tail call void @llvm.memcpy.p0i8.p0i8.i64( i8* %a, i8* %b, i64 %n, i32 1, i1 0 )
 	ret i8* %a
         
-; CHECK: test1:
-; CHECK: memcpy
+; LINUX: test1:
+; LINUX: memcpy
 }
 
 ; Variable memcpy's should lower to calls.
@@ -21,18 +22,41 @@ entry:
 	tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %tmp14, i8* %tmp25, i64 %n, i32 8, i1 0 )
 	ret i8* %tmp14
         
-; CHECK: test2:
-; CHECK: memcpy
+; LINUX: test2:
+; LINUX: memcpy
 }
 
 ; Large constant memcpy's should lower to a call when optimizing for size.
 ; PR6623
+
+; On the other hand, Darwin's definition of -Os is optimizing for size without
+; hurting performance so it should just ignore optsize when expanding memcpy.
+; rdar://8821501
 define void @test3(i8* nocapture %A, i8* nocapture %B) nounwind optsize noredzone {
 entry:
   tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %A, i8* %B, i64 64, i32 1, i1 false)
   ret void
-; CHECK: test3:
-; CHECK: memcpy
+; LINUX: test3:
+; LINUX: memcpy
+
+; DARWIN: test3:
+; DARWIN-NOT: memcpy
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
+; DARWIN: movq
 }
 
 ; Large constant memcpy's should be inlined when not optimizing for size.
@@ -40,18 +64,18 @@ define void @test4(i8* nocapture %A, i8* nocapture %B) nounwind noredzone {
 entry:
   tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %A, i8* %B, i64 64, i32 1, i1 false)
   ret void
-; CHECK: test4:
-; CHECK: movq
-; CHECK: movq
-; CHECK: movq
-; CHECK: movq
-; CHECK: movq
-; CHECK: movq
-; CHECK: movq
-; CHECK: movq
-; CHECK: movq
-; CHECK: movq
-; CHECK: movq
-; CHECK: movq
+; LINUX: test4:
+; LINUX movq
+; LINUX movq
+; LINUX movq
+; LINUX movq
+; LINUX movq
+; LINUX movq
+; LINUX movq
+; LINUX movq
+; LINUX movq
+; LINUX movq
+; LINUX movq
+; LINUX movq
 }