From a028e7a39c986845f216f652e1bb28fdfc81e5f7 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Tue, 27 Sep 2005 22:18:25 +0000 Subject: Darwin, like many BSD systems, has a setjmp/longjmp which saves the signal mask on setjmp calls and restores it on longjmp calls (both of which require syscalls). This makes the calls REALLY slow. Use _setjmp/_longjmp instead. This speeds up hexxagon from 120.31s to 15.68s: from 5.53x slower than GCC to 28% faster than GCC. llvm-svn: 23482 --- llvm/lib/Target/PowerPC/PPCISelLowering.cpp | 3 +++ 1 file changed, 3 insertions(+) (limited to 'llvm/lib/Target/PowerPC/PPCISelLowering.cpp') diff --git a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp index a6831b024f6..f3b7f64f191 100644 --- a/llvm/lib/Target/PowerPC/PPCISelLowering.cpp +++ b/llvm/lib/Target/PowerPC/PPCISelLowering.cpp @@ -28,6 +28,9 @@ PPC32TargetLowering::PPC32TargetLowering(TargetMachine &TM) // Fold away setcc operations if possible. setSetCCIsExpensive(); + // Use _setjmp/_longjmp instead of setjmp/longjmp. + setUseUnderscoreSetJmpLongJmp(true); + // Set up the register classes. addRegisterClass(MVT::i32, PPC32::GPRCRegisterClass); addRegisterClass(MVT::f32, PPC32::FPRCRegisterClass); -- cgit v1.2.3