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| author | Peter Collingbourne <peter@pcc.me.uk> | 2014-12-19 20:50:07 +0000 |
|---|---|---|
| committer | Peter Collingbourne <peter@pcc.me.uk> | 2014-12-19 20:50:07 +0000 |
| commit | 0e5c068592aa6eabeb22362738ea8e7788e1e31b (patch) | |
| tree | f9eedd1277c2f8633bd12c39d1578ac7d7ac1c7e | |
| parent | 04eeec32e6d39d7c102d31a5e196ff9907d3cc60 (diff) | |
| download | bcm5719-llvm-0e5c068592aa6eabeb22362738ea8e7788e1e31b.tar.gz bcm5719-llvm-0e5c068592aa6eabeb22362738ea8e7788e1e31b.zip | |
CodeGen: do not attempt to invalidate virtual registers for zero-sized phis.
llvm-svn: 224615
| -rw-r--r-- | llvm/include/llvm/CodeGen/FunctionLoweringInfo.h | 3 | ||||
| -rw-r--r-- | llvm/test/CodeGen/Generic/empty-phi.ll | 19 |
2 files changed, 22 insertions, 0 deletions
diff --git a/llvm/include/llvm/CodeGen/FunctionLoweringInfo.h b/llvm/include/llvm/CodeGen/FunctionLoweringInfo.h index 1ce099eef99..06cd12f4912 100644 --- a/llvm/include/llvm/CodeGen/FunctionLoweringInfo.h +++ b/llvm/include/llvm/CodeGen/FunctionLoweringInfo.h @@ -206,6 +206,9 @@ public: return; unsigned Reg = It->second; + if (Reg == 0) + return; + LiveOutRegInfo.grow(Reg); LiveOutRegInfo[Reg].IsValid = false; } diff --git a/llvm/test/CodeGen/Generic/empty-phi.ll b/llvm/test/CodeGen/Generic/empty-phi.ll new file mode 100644 index 00000000000..8d5f3b96941 --- /dev/null +++ b/llvm/test/CodeGen/Generic/empty-phi.ll @@ -0,0 +1,19 @@ +; RUN: llc < %s + +define void @f() { +entry: + br label %bb1 + +bb1: + %0 = phi [0 x { i8*, i64, i64 }] [ %load, %bb2 ], [ undef, %entry ] + store [0 x { i8*, i64, i64 }] %0, [0 x { i8*, i64, i64 }]* undef, align 8 + %1 = icmp eq i64 undef, 0 + br i1 %1, label %bb2, label %bb3 + +bb2: + %load = load [0 x { i8*, i64, i64 }]* undef, align 8 + br label %bb1 + +bb3: + ret void +} |
