Dan Gohman f20d70d57e Fix a bug in LoopStrengthReduce that caused it to emit IR with ... use-before-def. The problem comes up in code with multiple PHIs where one PHI is being rewritten in terms of the other, but the other needs to be casted first. LLVM rules requre the cast instruction to be inserted after any PHI instructions, but when instructions were inserted to replace the second PHI value with a function of the first, they were ended up going before the cast instruction. Avoid this problem by remembering the location of the cast instruction, when one is needed, and inserting the expansion of the new value after it. This fixes a bug that surfaced in 255.vortex on x86-64 when instcombine was removed from the middle of the loop optimization passes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51169 91177308-0d34-0410-b5e6-96231b3b80d8		2008-05-15 23:26:57 +00:00
..
Alpha	Fix RUN line.	2008-03-09 19:55:22 +00:00
ARM	If a PHI node has a single implicit_def source, replace it with an implicit_def instead of a copy.	2008-04-11 17:54:45 +00:00
CBackend	rename *.llx -> *.ll	2008-04-19 22:29:10 +00:00
CellSPU	Update and_ops.ll according to the recent dagcombiner changes.	2008-04-28 23:26:22 +00:00
Generic	Remove the code from CodeGenPrepare that moved getresult instructions	2008-04-25 18:27:55 +00:00
IA64	Remove llvm-upgrade and update tests.	2008-02-19 01:41:04 +00:00
PowerPC	Adding testcase.	2008-05-01 18:41:09 +00:00
SPARC	Remove llvm-upgrade and update tests.	2008-02-19 01:41:04 +00:00
X86	Fix a bug in LoopStrengthReduce that caused it to emit IR with	2008-05-15 23:26:57 +00:00