Teach simplify libcall to transform __strcpy_chk to __memcpy_chk to enable optimizations down stream.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99282 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Transforms/SimplifyLibCalls/StrCpy.ll b/test/Transforms/SimplifyLibCalls/StrCpy.ll
index 7542984..c3cc58c 100644
--- a/test/Transforms/SimplifyLibCalls/StrCpy.ll
+++ b/test/Transforms/SimplifyLibCalls/StrCpy.ll
@@ -1,30 +1,37 @@
; Test that the StrCpyOptimizer works correctly
-; RUN: opt < %s -simplify-libcalls -S | \
-; RUN: not grep {call.*strcpy}
+; RUN: opt < %s -simplify-libcalls -S | FileCheck %s
; This transformation requires the pointer size, as it assumes that size_t is
; the size of a pointer.
-target datalayout = "-p:64:64:64"
+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-n8:16:32"
-@hello = constant [6 x i8] c"hello\00" ; <[6 x i8]*> [#uses=1]
-@null = constant [1 x i8] zeroinitializer ; <[1 x i8]*> [#uses=1]
-@null_hello = constant [7 x i8] c"\00hello\00" ; <[7 x i8]*> [#uses=1]
+@hello = constant [6 x i8] c"hello\00"
declare i8* @strcpy(i8*, i8*)
-declare i32 @puts(i8*)
+declare i8* @__strcpy_chk(i8*, i8*, i32) nounwind
-define i32 @main() {
- %target = alloca [1024 x i8] ; <[1024 x i8]*> [#uses=1]
- %arg1 = getelementptr [1024 x i8]* %target, i32 0, i32 0 ; <i8*> [#uses=2]
- store i8 0, i8* %arg1
- %arg2 = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=1]
- %rslt1 = call i8* @strcpy( i8* %arg1, i8* %arg2 ) ; <i8*> [#uses=1]
- %arg3 = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=1]
- %rslt2 = call i8* @strcpy( i8* %rslt1, i8* %arg3 ) ; <i8*> [#uses=1]
- %arg4 = getelementptr [7 x i8]* @null_hello, i32 0, i32 0 ; <i8*> [#uses=1]
- %rslt3 = call i8* @strcpy( i8* %rslt2, i8* %arg4 ) ; <i8*> [#uses=1]
- call i32 @puts( i8* %rslt3 ) ; <i32>:1 [#uses=0]
- ret i32 0
+declare i32 @llvm.objectsize.i32(i8*, i1) nounwind readonly
+
+; rdar://6839935
+
+define i32 @t1() {
+; CHECK: @t1
+ %target = alloca [1024 x i8]
+ %arg1 = getelementptr [1024 x i8]* %target, i32 0, i32 0
+ %arg2 = getelementptr [6 x i8]* @hello, i32 0, i32 0
+ %rslt1 = call i8* @strcpy( i8* %arg1, i8* %arg2 )
+; CHECK: @llvm.memcpy.i32
+ ret i32 0
}
+define i32 @t2() {
+; CHECK: @t2
+ %target = alloca [1024 x i8]
+ %arg1 = getelementptr [1024 x i8]* %target, i32 0, i32 0
+ %arg2 = getelementptr [6 x i8]* @hello, i32 0, i32 0
+ %tmp1 = call i32 @llvm.objectsize.i32(i8* %arg1, i1 false)
+ %rslt1 = call i8* @__strcpy_chk(i8* %arg1, i8* %arg2, i32 %tmp1)
+; CHECK: @__memcpy_chk
+ ret i32 0
+}