Chris Lattner bfd3e52701 Do not compute the predecessor list for a block unless we need it. ... This speeds up simplifycfg on this program, from 44.87s to 0.29s (with a profiled build): #define CL0(a) case a: goto c; #define CL1(a) CL0(a##0) CL0(a##1) CL0(a##2) CL0(a##3) CL0(a##4) CL0(a##5) \ CL0(a##6) CL0(a##7) CL0(a##8) CL0(a##9) #define CL2(a) CL1(a##0) CL1(a##1) CL1(a##2) CL1(a##3) CL1(a##4) CL1(a##5) \ CL1(a##6) CL1(a##7) CL1(a##8) CL1(a##9) #define CL3(a) CL2(a##0) CL2(a##1) CL2(a##2) CL2(a##3) CL2(a##4) CL2(a##5) \ CL2(a##6) CL2(a##7) CL2(a##8) CL2(a##9) #define CL4(a) CL3(a##0) CL3(a##1) CL3(a##2) CL3(a##3) CL3(a##4) CL3(a##5) \ CL3(a##6) CL3(a##7) CL3(a##8) CL3(a##9) void f(); void a() { int b; c: switch (b) { CL4(1) } } This testcase is contrived to expose N^2 behavior, but this patch should speedup simplifycfg on any programs that use large switch statements. This testcase comes from GCC PR17895. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17389 91177308-0d34-0410-b5e6-96231b3b80d8		2004-11-01 06:53:58 +00:00
..
Hello	Change Library Names Not To Conflict With Others When Installed	2004-10-27 23:18:45 +00:00
Instrumentation	Change Library Names Not To Conflict With Others When Installed	2004-10-27 23:18:45 +00:00
IPO	Change Library Names Not To Conflict With Others When Installed	2004-10-27 23:18:45 +00:00
Scalar	Change Library Names Not To Conflict With Others When Installed	2004-10-27 23:18:45 +00:00
Utils	Do not compute the predecessor list for a block unless we need it.	2004-11-01 06:53:58 +00:00
ExprTypeConvert.cpp	Add includes and use std:: for standard library calls to make code	2004-09-28 14:42:44 +00:00
LevelRaise.cpp	Prototype more accurately	2004-09-20 04:43:57 +00:00
Makefile	Change Library Names Not To Conflict With Others When Installed	2004-10-27 23:18:45 +00:00
TransformInternals.cpp	Merge i*.h headers into Instructions.h as part of bug403.	2004-07-29 12:17:34 +00:00
TransformInternals.h	Convert 'struct' to 'class' in various places to adhere to the coding standards	2004-10-27 16:14:51 +00:00