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| author | Dan Gohman <gohman@apple.com> | 2009-09-15 01:22:01 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-09-15 01:22:01 +0000 |
| commit | 1e038a8494c9b363cd03a1e239d3a6817d7edec3 (patch) | |
| tree | 3e08d938c1ed60bb7884a1bbbd7fb686e2d2f2c1 /test/CodeGen/X86/combiner-aa-1.ll | |
| parent | 71524d716ad7da8f5a8e75085f9739aa6b772f9d (diff) | |
| download | llvm-1e038a8494c9b363cd03a1e239d3a6817d7edec3.tar.gz llvm-1e038a8494c9b363cd03a1e239d3a6817d7edec3.tar.bz2 llvm-1e038a8494c9b363cd03a1e239d3a6817d7edec3.tar.xz | |
Don't pull a load through a callseq_start if the load's chain
has multiple uses, as one of the other uses may be on a path
to a different node above the callseq_start, because that
leads to a cyclic graph. This problem is exposed when
-combiner-global-alias-analysis is used. This fixes PR4880.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81821 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/combiner-aa-1.ll')
| -rw-r--r-- | test/CodeGen/X86/combiner-aa-1.ll | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/test/CodeGen/X86/combiner-aa-1.ll b/test/CodeGen/X86/combiner-aa-1.ll new file mode 100644 index 0000000000..58a7129b60 --- /dev/null +++ b/test/CodeGen/X86/combiner-aa-1.ll @@ -0,0 +1,23 @@ +; RUN: llc < %s --combiner-alias-analysis --combiner-global-alias-analysis +; PR4880 + +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-f80:32:32" +target triple = "i386-pc-linux-gnu" + +%struct.alst_node = type { %struct.node } +%struct.arg_node = type { %struct.node, i8*, %struct.alst_node* } +%struct.arglst_node = type { %struct.alst_node, %struct.arg_node*, %struct.arglst_node* } +%struct.lam_node = type { %struct.alst_node, %struct.arg_node*, %struct.alst_node* } +%struct.node = type { i32 (...)**, %struct.node* } + +define i32 @._ZN8lam_node18resolve_name_clashEP8arg_nodeP9alst_node._ZNK8lam_nodeeqERK8exp_node._ZN11arglst_nodeD0Ev(%struct.lam_node* %this.this, %struct.arg_node* %outer_arg, %struct.alst_node* %env.cmp, %struct.arglst_node* %this, i32 %functionID) { +comb_entry: + %.SV59 = alloca %struct.node* ; <%struct.node**> [#uses=1] + %0 = load i32 (...)*** null, align 4 ; <i32 (...)**> [#uses=1] + %1 = getelementptr inbounds i32 (...)** %0, i32 3 ; <i32 (...)**> [#uses=1] + %2 = load i32 (...)** %1, align 4 ; <i32 (...)*> [#uses=1] + store %struct.node* undef, %struct.node** %.SV59 + %3 = bitcast i32 (...)* %2 to i32 (%struct.node*)* ; <i32 (%struct.node*)*> [#uses=1] + %4 = tail call i32 %3(%struct.node* undef) ; <i32> [#uses=0] + unreachable +} |