[llvm-commits] [llvm] r164800 - in /llvm/trunk/test/Transforms/InstCombine: strncpy_chk-1.ll strncpy_chk-2.ll

[Meador Inge]

Author: meadori
Date: Thu Sep 27 16:21:31 2012
New Revision: 164800

URL: http://llvm.org/viewvc/llvm-project?rev=164800&view=rev
Log:
instcombine: Add more test cases for __strncpy_chk simplification

Added:
    llvm/trunk/test/Transforms/InstCombine/strncpy_chk-1.ll
    llvm/trunk/test/Transforms/InstCombine/strncpy_chk-2.ll

Added: llvm/trunk/test/Transforms/InstCombine/strncpy_chk-1.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/strncpy_chk-1.ll?rev=164800&view=auto
==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/strncpy_chk-1.ll (added)
+++ llvm/trunk/test/Transforms/InstCombine/strncpy_chk-1.ll Thu Sep 27 16:21:31 2012
@@ -0,0 +1,66 @@
+; Test lib call simplification of __strncpy_chk calls with various values
+; for len and dstlen.
+;
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+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"
+
+ at a = common global [60 x i8] zeroinitializer, align 1
+ at b = common global [60 x i8] zeroinitializer, align 1
+ at .str = private constant [8 x i8] c"abcdefg\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
+
+; CHECK-NEXT: call i8* @strncpy
+  call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 8, 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
+
+; CHECK-NEXT: call i8* @strncpy
+  call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 8, i32 8)
+  ret void
+}
+
+define void @test_simplify3() {
+; CHECK: @test_simplify3
+  %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
+  %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)
+  ret void
+}
+
+; Check cases where dstlen < len
+
+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
+
+; CHECK-NEXT: call i8* @__strncpy_chk
+  call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 8, i32 4)
+  ret void
+}
+
+define void @test_no_simplify2() {
+; CHECK: @test_no_simplify2
+  %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
+  %src = getelementptr inbounds [60 x i8]* @b, i32 0, i32 0
+
+; CHECK-NEXT: call i8* @__strncpy_chk
+  call i8* @__strncpy_chk(i8* %dst, i8* %src, i32 8, i32 0)
+  ret void
+}
+
+declare i8* @__strncpy_chk(i8*, i8*, i32, i32)

Added: llvm/trunk/test/Transforms/InstCombine/strncpy_chk-2.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/strncpy_chk-2.ll?rev=164800&view=auto
==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/strncpy_chk-2.ll (added)
+++ llvm/trunk/test/Transforms/InstCombine/strncpy_chk-2.ll Thu Sep 27 16:21:31 2012
@@ -0,0 +1,21 @@
+; Test that lib call simplification doesn't simplify __strncpy_chk calls
+; with the wrong prototype.
+;
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+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"
+
+ at a = common global [60 x i16] zeroinitializer, align 1
+ at b = common global [60 x i16] zeroinitializer, align 1
+
+define void @test_no_simplify() {
+; CHECK: @test_no_simplify
+  %dst = getelementptr inbounds [60 x i16]* @a, i32 0, i32 0
+  %src = getelementptr inbounds [60 x i16]* @b, i32 0, i32 0
+
+; CHECK-NEXT: call i16* @__strncpy_chk
+  call i16* @__strncpy_chk(i16* %dst, i16* %src, i32 60, i32 60)
+  ret void
+}
+
+declare i16* @__strncpy_chk(i16*, i16*, i32, i32)