trans: don't declare symbols that were already imported. #32742
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r? @pnkfelix (rust_highfive has picked a reviewer for you, use r? to override) |
| @@ -158,15 +158,22 @@ pub fn get_defined_value(ccx: &CrateContext, name: &str) -> Option<ValueRef> { | |||
| debug!("get_defined_value: {:?} value is null", name); | |||
| None | |||
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Should say get_declared_value
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Added the testcase to an existing duplicated FFI import test and confirmed that the snapshot compiler segfaults (because it has LLVM assertions turned off) and an older stage2 build I had laying around triggers the LLVM assertion, while stage1 passes the test. |
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@bors r+ |
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📌 Commit e17c48b has been approved by |
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@bors p=1 Probably unblocks servo/servo#10173 |
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I confirm that I don't get the compilation error anymore, with this patch. Thanks @eddyb 😃 |
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@bors-servo p=20 rollum shmollup this is more important |
bors
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trans: don't declare symbols that were already imported. Fixes #32740 by checking for a declaration before attempting a new one. Before, `LLVMGetOrInsertFunction` was called for a existing import, but with a different type. The returned value was a cast function pointer instead of a declaration, and we gave this value to `llvm::SetFunctionCallConv` & friends , which triggered an LLVM assertion.
Manishearth
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Apr 15, 2016
trans: always register an item's symbol, even if duplicated. Fixes rust-lang#32783 which was introduced by not always registering item symbols in rust-lang#32742.
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Fixes #32740 by checking for a declaration before attempting a new one.
Before,
LLVMGetOrInsertFunctionwas called for a existing import, but with a different type.The returned value was a cast function pointer instead of a declaration, and we gave this
value to
llvm::SetFunctionCallConv& friends , which triggered an LLVM assertion.