3 Commits

Author	SHA1	Message	Date
Dan Gohman	46bdfb0e6b	Rename ScalarEvolution's getIterationCount to getBackedgeTakenCount, ... to more accurately describe what it does. Expand its doxygen comment to describe what the backedge-taken count is and how it differs from the actual iteration count of the loop. Adjust names and comments in associated code accordingly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65382 91177308-0d34-0410-b5e6-96231b3b80d8	2009-02-24 18:55:53 +00:00
Dan Gohman	8dae138d06	Fix WriteAsOperand to not emit a leading space character. Adjust ... its callers to emit a space character before calling it when a space is needed. This fixes several spurious whitespace issues in ScalarEvolution's debug dumps. See the test changes for examples. This also fixes odd space-after-tab indentation in the output for switch statements, and changes calls from being printed like this: call void @foo( i32 %x ) to this: call void @foo(i32 %x) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56196 91177308-0d34-0410-b5e6-96231b3b80d8	2008-09-14 17:21:12 +00:00
Eli Friedman	068acc3caa	Fix for PR2607: SCEV miscomputing the loop count for loops with an ... SGT exit condition. Essentially, the correct way to flip an inequality in 2's complement is the not operator, not the negation operator. That said, the difference only affects cases involving INT_MIN. Also, enhance the pre-test search logic to be a bit smarter about inequalities flipped with a not operator, so it can eliminate the smax from the iteration count for simple loops. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54184 91177308-0d34-0410-b5e6-96231b3b80d8	2008-07-30 00:04:08 +00:00