commit 067294b3acb17f9ab3fd0f276df5806524c64d1a
author Meador Inge <meadori@codesourcery.com> Wed Oct 31 03:33:00 2012 +0000
committer Meador Inge <meadori@codesourcery.com> Wed Oct 31 03:33:00 2012 +0000
tree 76574bc0bed53d10388e1f18455ac02d934c4708
parent ce77ab0c2457389d083a21d498b9ae16dab5dc05

instcombine: Migrate strncpy optimizations

This patch migrates the strncpy optimizations from the simplify-libcalls
pass into the instcombine library call simplifier.

llvm-svn: 167102

llvm/test/Transforms/InstCombine/strncpy_chk-1.ll

diff --git a/llvm/test/Transforms/InstCombine/strncpy_chk-1.ll b/llvm/test/Transforms/InstCombine/strncpy_chk-1.ll
index ae7e2fb..aadff42 100644
--- a/llvm/test/Transforms/InstCombine/strncpy_chk-1.ll
+++ b/llvm/test/Transforms/InstCombine/strncpy_chk-1.ll
@@ -7,27 +7,27 @@
 
 @a = common global [60 x i8] zeroinitializer, align 1
 @b = common global [60 x i8] zeroinitializer, align 1
-@.str = private constant [8 x i8] c"abcdefg\00"
+@.str = private constant [12 x i8] c"abcdefghijk\00"
 
 ; Check cases where dstlen >= len
 
 define void @test_simplify1() {
 ; CHECK: @test_simplify1
   %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
-  %src = getelementptr inbounds [8 x i8]* @.str, i32 0, i32 0
+  %src = getelementptr inbounds [12 x i8]* @.str, i32 0, i32 0
 
-; CHECK-NEXT: call i8* @strncpy
-  call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 8, i32 60)
+; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32
+  call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 12, i32 60)
   ret void
 }
 
 define void @test_simplify2() {
 ; CHECK: @test_simplify2
   %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
-  %src = getelementptr inbounds [8 x i8]* @.str, i32 0, i32 0
+  %src = getelementptr inbounds [12 x i8]* @.str, i32 0, i32 0
 
-; CHECK-NEXT: call i8* @strncpy
-  call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 8, i32 8)
+; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32
+  call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 12, i32 12)
   ret void
 }
 
@@ -37,7 +37,7 @@
   %src = getelementptr inbounds [60 x i8]* @b, i32 0, i32 0
 
 ; CHECK-NEXT: call i8* @strncpy
-  call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 8, i32 60)
+  call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 12, i32 60)
   ret void
 }
 
@@ -46,7 +46,7 @@
 define void @test_no_simplify1() {
 ; CHECK: @test_no_simplify1
   %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
-  %src = getelementptr inbounds [8 x i8]* @.str, i32 0, i32 0
+  %src = getelementptr inbounds [12 x i8]* @.str, i32 0, i32 0
 
 ; CHECK-NEXT: call i8* @__strncpy_chk
   call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 8, i32 4)