[IMPALA-4164] Codegen does not generate target-specific machine code for cross-compiled functions

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: Impala 2.8.0
• Fix Version/s: Impala 2.9.0
• Component/s: Backend
• Labels: codegen perf
• Target Version: Product Backlog
• Assignee: Michael Ho
• Reporter: Tim Armstrong
• Created: 19/Sep/16 19:58
• Updated: 30/Jun/17 18:39
• Resolved: 08/Jun/17 22:30

Description

I discovered this while playing around with different inlining settings. It turns out that clang's LLVM IR output has hidden "target-cpu" and "target-features" function attributes that force the functions to be compiled for generic x86-64 machines (since that is what we asked clang to compile for). These are not overridden at any point.

Issue Links

• is related to: IMPALA-3259 Codegen is not cancellable and can use a lot of CPU and memory