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| author | Meador Inge <meadori@codesourcery.com> | 2012-10-31 03:33:00 +0000 |
|---|---|---|
| committer | Meador Inge <meadori@codesourcery.com> | 2012-10-31 03:33:00 +0000 |
| commit | a0885fb8825ed362041b5cf291a007a9f9301ff8 (patch) | |
| tree | 43c9bc8a05a51d1c756183727de3de7a5f0d1a65 /test/Transforms/InstCombine/strncpy-2.ll | |
| parent | 5b2c4dc5f8f70352f029d595797089821eb39b3c (diff) | |
| download | llvm-a0885fb8825ed362041b5cf291a007a9f9301ff8.tar.gz llvm-a0885fb8825ed362041b5cf291a007a9f9301ff8.tar.bz2 llvm-a0885fb8825ed362041b5cf291a007a9f9301ff8.tar.xz | |
instcombine: Migrate strncpy optimizations
This patch migrates the strncpy optimizations from the simplify-libcalls
pass into the instcombine library call simplifier.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167102 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/InstCombine/strncpy-2.ll')
| -rw-r--r-- | test/Transforms/InstCombine/strncpy-2.ll | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/strncpy-2.ll b/test/Transforms/InstCombine/strncpy-2.ll new file mode 100644 index 0000000000..ac28ea6550 --- /dev/null +++ b/test/Transforms/InstCombine/strncpy-2.ll @@ -0,0 +1,22 @@ +; Test that the strncpy library call simplifier works correctly. +; +; 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" + +@hello = constant [6 x i8] c"hello\00" +@a = common global [32 x i8] zeroinitializer, align 1 + +declare i16* @strncpy(i8*, i8*, i32) + +; Check that 'strncpy' functions with the wrong prototype aren't simplified. + +define void @test_no_simplify1() { +; CHECK: @test_no_simplify1 + %dst = getelementptr [32 x i8]* @a, i32 0, i32 0 + %src = getelementptr [6 x i8]* @hello, i32 0, i32 0 + + call i16* @strncpy(i8* %dst, i8* %src, i32 6) +; CHECK: call i16* @strncpy + ret void +} |