2 files changed, 117 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/stpcpy_chk-1.ll b/test/Transforms/InstCombine/stpcpy_chk-1.ll
new file mode 100644
index 0000000..d06b328
--- /dev/null
+++ b/test/Transforms/InstCombine/stpcpy_chk-1.ll
@@ -0,0 +1,96 @@
+; Test lib call simplification of __stpcpy_chk calls with various values
+; for src, dst, and slen.
+;
+; 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"
+
+@a = common global [60 x i8] zeroinitializer, align 1
+@b = common global [60 x i8] zeroinitializer, align 1
+@.str = private constant [12 x i8] c"abcdefghijk\00"
+
+; Check cases where slen >= strlen (src).
+
+define void @test_simplify1() {
+; CHECK: @test_simplify1
+  %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
+  %src = getelementptr inbounds [12 x i8]* @.str, i32 0, i32 0
+
+; CHECK-NEXT: call i8* @stpcpy
+  call i8* @__stpcpy_chk(i8* %dst, i8* %src, 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 [12 x i8]* @.str, i32 0, i32 0
+
+; CHECK-NEXT: call i8* @stpcpy
+  call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 12)
+  ret void
+}
+
+define void @test_simplify3() {
+; CHECK: @test_simplify3
+  %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
+  %src = getelementptr inbounds [12 x i8]* @.str, i32 0, i32 0
+
+; CHECK-NEXT: call i8* @stpcpy
+  call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 -1)
+  ret void
+}
+
+; Check cases where there are no string constants.
+
+define void @test_simplify4() {
+; CHECK: @test_simplify4
+  %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* @stpcpy
+  call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 -1)
+  ret void
+}
+
+; Check case where the string length is not constant.
+
+define i8* @test_simplify5() {
+; CHECK: @test_simplify5
+  %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
+  %src = getelementptr inbounds [12 x i8]* @.str, i32 0, i32 0
+
+; CHECK: @__memcpy_chk
+  %len = call i32 @llvm.objectsize.i32(i8* %dst, i1 false)
+  %ret = call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 %len)
+; CHECK: ret i8* getelementptr inbounds ([60 x i8]* @a, i32 0, i32 11)
+  ret i8* %ret
+}
+
+; Check case where the source and destination are the same.
+
+define i8* @test_simplify6() {
+; CHECK: @test_simplify6
+  %dst = getelementptr inbounds [60 x i8]* @a, i32 0, i32 0
+
+; CHECK: [[LEN:%[a-z]+]] = call i32 @strlen
+; CHECK-NEXT: getelementptr inbounds [60 x i8]* @a, i32 0, i32 [[LEN]]
+  %len = call i32 @llvm.objectsize.i32(i8* %dst, i1 false)
+  %ret = call i8* @__stpcpy_chk(i8* %dst, i8* %dst, i32 %len)
+  ret i8* %ret
+}
+
+; Check case where slen < strlen (src).
+
+define void @test_no_simplify1() {
+; CHECK: @test_no_simplify1
+  %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* @__stpcpy_chk
+  call i8* @__stpcpy_chk(i8* %dst, i8* %src, i32 8)
+  ret void
+}
+
+declare i8* @__stpcpy_chk(i8*, i8*, i32) nounwind
+declare i32 @llvm.objectsize.i32(i8*, i1) nounwind readonly
diff --git a/test/Transforms/InstCombine/stpcpy_chk-2.ll b/test/Transforms/InstCombine/stpcpy_chk-2.ll
new file mode 100644
index 0000000..46c2139
--- /dev/null
+++ b/test/Transforms/InstCombine/stpcpy_chk-2.ll
@@ -0,0 +1,21 @@
+; Test that lib call simplification doesn't simplify __stpcpy_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"
+
+@a = common global [60 x i16] zeroinitializer, align 1
+@.str = private constant [8 x i8] c"abcdefg\00"
+
+define void @test_no_simplify() {
+; CHECK: @test_no_simplify
+  %dst = getelementptr inbounds [60 x i16]* @a, i32 0, i32 0
+  %src = getelementptr inbounds [8 x i8]* @.str, i32 0, i32 0
+
+; CHECK-NEXT: call i16* @__strcpy_chk
+  call i16* @__strcpy_chk(i16* %dst, i8* %src, i32 8)
+  ret void
+}
+
+declare i16* @__strcpy_chk(i16*, i8*, i32)