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author | Chris Lattner <sabre@nondot.org> | 2004-09-19 19:17:10 +0000 |
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committer | Chris Lattner <sabre@nondot.org> | 2004-09-19 19:17:10 +0000 |
commit | c2fa9894ee755c1084bc767d2306bbd7049a0be7 (patch) | |
tree | c7ddbe8de4f11035f358be3d2e8684b962285634 /test | |
parent | fff03c9074ba5ee883b67d422c581f2397779264 (diff) | |
download | external_llvm-c2fa9894ee755c1084bc767d2306bbd7049a0be7.zip external_llvm-c2fa9894ee755c1084bc767d2306bbd7049a0be7.tar.gz external_llvm-c2fa9894ee755c1084bc767d2306bbd7049a0be7.tar.bz2 |
New testcase for PR362: Icky code generated for std::min/std::max
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16408 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
-rw-r--r-- | test/Transforms/InstCombine/CPP_min_max.llx | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/CPP_min_max.llx b/test/Transforms/InstCombine/CPP_min_max.llx new file mode 100644 index 0000000..0a0baf8 --- /dev/null +++ b/test/Transforms/InstCombine/CPP_min_max.llx @@ -0,0 +1,34 @@ +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep select | not grep 'int\*' + +; This testcase corresponds to PR362, which notices that this horrible code +; is generated by the C++ front-end and LLVM optimizers, which has lots of +; loads and other stuff that are unneeded. +; +; Instcombine should propagate the load through the select instructions to +; allow elimination of the extra stuff by the mem2reg pass. + +implementation ; Functions: + +void %_Z5test1RiS_(int* %x, int* %y) { +entry: + %tmp.1.i = load int* %y ; <int> [#uses=1] + %tmp.3.i = load int* %x ; <int> [#uses=1] + %tmp.4.i = setlt int %tmp.1.i, %tmp.3.i ; <bool> [#uses=1] + %retval.i = select bool %tmp.4.i, int* %y, int* %x ; <int*> [#uses=1] + %tmp.4 = load int* %retval.i ; <int> [#uses=1] + store int %tmp.4, int* %x + ret void +} + +void %_Z5test2RiS_(int* %x, int* %y) { +entry: + %tmp.0 = alloca int ; <int*> [#uses=2] + %tmp.2 = load int* %x ; <int> [#uses=2] + store int %tmp.2, int* %tmp.0 + %tmp.3.i = load int* %y ; <int> [#uses=1] + %tmp.4.i = setlt int %tmp.2, %tmp.3.i ; <bool> [#uses=1] + %retval.i = select bool %tmp.4.i, int* %y, int* %tmp.0 ; <int*> [#uses=1] + %tmp.6 = load int* %retval.i ; <int> [#uses=1] + store int %tmp.6, int* %y + ret void +} |