Richard Sandiford 0416e3c599 [SystemZ] Move compare-and-branch generation even later ... r187116 moved compare-and-branch generation from the instruction-selection pass to the peephole optimizer (via optimizeCompare). It turns out that even this is a bit too early. Fused compare-and-branch instructions don't interact well with predication, where a CC result is needed. They also make it harder to reuse the CC side-effects of earlier instructions (not yet implemented, but the subject of a later patch). Another problem was that the AnalyzeBranch family of routines weren't handling compares and branches, so we weren't able to reverse the fused form in cases where we would reverse a separate branch. This could have been fixed by extending AnalyzeBranch, but given the other problems, I've instead moved the fusing to the long-branch pass, which is also responsible for the opposite transformation: splitting out-of-range compares and branches into separate compares and long branches. I've added a test for the AnalyzeBranch problem. A test for the predication problem is included in the next patch, which fixes a bug in the choice of CC mask. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187494 91177308-0d34-0410-b5e6-96231b3b80d8		2013-07-31 12:11:07 +00:00
..
AArch64	AArch64: add llc-based tests for previous commit.	2013-07-25 16:23:55 +00:00
ARM	This test may have been sensitive to the ARM ABI...	2013-07-30 20:34:59 +00:00
CPP	test commit: remove blank line.	2013-03-14 05:43:59 +00:00
Generic	Debug Info: clean up usage of Verify.	2013-06-28 05:43:10 +00:00
Hexagon	Debug Info Verifier: verify SPs in llvm.dbg.sp.	2013-07-27 01:26:08 +00:00
Inputs	Debug Info Verifier: verify SPs in llvm.dbg.sp.	2013-07-27 01:26:08 +00:00
Mips	[mips] Implement llvm.trap intrinsic.	2013-07-26 20:58:55 +00:00
MSP430	Use conventional syntax for branches.	2013-07-14 18:19:44 +00:00
NVPTX	Add a target legalize hook for SplitVectorOperand (again)	2013-07-26 13:28:29 +00:00
PowerPC	PPC32 va_list is an actual structure so va_copy needs to copy the whole	2013-07-25 21:36:47 +00:00
R600	R600/SI: Expand vector fp <-> int conversions	2013-07-30 14:31:03 +00:00
SI
SPARC	Allocate local registers in order for optimal coloring.	2013-07-25 18:35:14 +00:00
SystemZ	[SystemZ] Move compare-and-branch generation even later	2013-07-31 12:11:07 +00:00
Thumb	Debug Info: update testing cases to pass verifier.	2013-07-29 18:12:58 +00:00
Thumb2	Refactor AnalyzeBranch on ARM. The previous version did not always analyze	2013-07-19 23:52:47 +00:00
X86	Added INSERT and EXTRACT intructions from AVX-512 ISA.	2013-07-31 11:35:14 +00:00
XCore	Disambiguate function names in some CodeGen tests. (Some tests were using function names that also were names of instructions and/or doing other unusual things that were making the test not amenable to otherwise scriptable pattern matching.) No functionality change.	2013-07-18 22:29:15 +00:00