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saman
2013 Oct 08
0
[LLVMdev] What makes register allocation expensive?
...is worth checking before trying more
involved options). A 20x slow-down that looks to be on everything (rather
than one component) is a strong symptom for this.
Cheers,
Dave
-----Original Message-----
From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On
Behalf Of Mars Saxman
Sent: 08 October 2013 03:03
To: llvmdev at cs.uiuc.edu
Subject: [LLVMdev] What makes register allocation expensive?
Compile times increased by roughly 20X after upgrading the Radian
compiler project from LLVM 3.1 to 3.3. I am curious whether this is
considered normal. If it is not, I would appre...
2013 Oct 08
2
[LLVMdev] What makes register allocation expensive?
Compile times increased by roughly 20X after upgrading the Radian
compiler project from LLVM 3.1 to 3.3. I am curious whether this is
considered normal. If it is not, I would appreciate some help figuring
out what it is about the Radian compiler's output which is causing LLVM
to spend so much time compiling such small programs.
I recorded these times with Apple's Xcode Instruments