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
..
Analysis	* Do not refer to ActualCallees in CBU, when we can do it locally.	2004-10-31 23:41:26 +00:00
Archive	Changes For Bug 352	2004-09-01 22:55:40 +00:00
AsmParser	Make sure that the yacc and lex output are specified as BUILT_SOURCES.	2004-10-28 00:43:24 +00:00
Bytecode	Fix library name.	2004-10-28 05:32:01 +00:00
CodeGen	Change Library Names Not To Conflict With Others When Installed	2004-10-27 23:18:45 +00:00
Debugger	Change Library Names Not To Conflict With Others When Installed	2004-10-27 23:18:45 +00:00
ExecutionEngine	When emitting debug msgs for function stubs, don't truncate the	2004-10-29 18:22:45 +00:00
Linker	Add support for undef and unreachable	2004-10-16 18:08:06 +00:00
Support	* Fix compilation on AIX: GCC's fixincludes eliminates isinf() declaration	2004-10-29 23:17:45 +00:00
System	Change Library Names Not To Conflict With Others When Installed	2004-10-27 23:18:45 +00:00
Target	Internalize variable names to prevent recursive assignment. Cleanup docs.	2004-10-30 09:19:36 +00:00
Transforms	Do not compute the predecessor list for a block unless we need it.	2004-11-01 06:53:58 +00:00
VMCore	The Alpha (tm) intrinsics have never been used anywhere	2004-10-29 18:43:17 +00:00
Makefile	Wrap long line	2004-09-15 01:34:42 +00:00