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[/] [scarts/] [trunk/] [toolchain/] [scarts-gcc/] [gcc-4.1.1/] [gcc/] [testsuite/] [g++.old-deja/] [g++.other/] [perf1.C] - Rev 12
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// { dg-do assemble }
// Test of severe performance regression from 2.95. This code generates
// a heavily self-referential tree which caused the inliner to take
// O(3**N) time to scan it for function calls.
// Reported by Kelley Cook <kelley.cook@home.com>. PR c++/1687.
bool in0 ;
bool in1 ;
bool in2 ;
bool in3 ;
bool in4 ;
bool in5 ;
bool in6 ;
bool in7 ;
bool in8 ;
bool in9 ;
bool in10;
bool in11;
bool in12;
bool in13;
bool in14;
bool in15;
bool in16;
bool in17;
bool in18;
bool in19;
bool in20;
bool in21;
bool in22;
bool in23;
bool in24;
bool in25;
bool in26;
bool in27;
bool in28;
bool in29;
bool in30;
bool in31;
unsigned long output;
void mux(void)
{
output =
(in0 ? 0x00000001 : 0) |
(in1 ? 0x00000002 : 0) |
(in2 ? 0x00000004 : 0) |
(in3 ? 0x00000008 : 0) |
(in4 ? 0x00000010 : 0) |
(in5 ? 0x00000020 : 0) |
(in6 ? 0x00000040 : 0) |
(in7 ? 0x00000080 : 0) |
(in8 ? 0x00000100 : 0) |
(in9 ? 0x00000200 : 0) |
(in10 ? 0x00000400 : 0) |
(in11 ? 0x00000800 : 0) |
(in12 ? 0x00001000 : 0) |
(in13 ? 0x00002000 : 0) |
(in14 ? 0x00004000 : 0) |
(in15 ? 0x00008000 : 0) |
(in16 ? 0x00010000 : 0) |
(in17 ? 0x00020000 : 0) |
(in18 ? 0x00040000 : 0) |
(in19 ? 0x00080000 : 0) |
(in20 ? 0x00100000 : 0) |
(in21 ? 0x00200000 : 0) |
(in22 ? 0x00400000 : 0) |
(in23 ? 0x00800000 : 0) |
(in24 ? 0x01000000 : 0) |
(in25 ? 0x02000000 : 0) |
(in26 ? 0x04000000 : 0) |
(in27 ? 0x08000000 : 0) |
(in28 ? 0x10000000 : 0) |
(in29 ? 0x20000000 : 0) |
(in30 ? 0x40000000 : 0) |
(in31 ? 0x80000000 : 0) ;
}