Duncan Sands 3eba667081 Revert commits 96556 and 96640, because commit 96556 breaks the ... dragonegg self-host build. I reverted 96640 in order to revert 96556 (96640 goes on top of 96556), but it also looks like with both of them applied the breakage happens even earlier. The symptom of the 96556 miscompile is the following crash: llvm[3]: Compiling AlphaISelLowering.cpp for Release build cc1plus: /home/duncan/tmp/tmp/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp:4982: void llvm::SelectionDAG::ReplaceAllUsesWith(llvm::SDNode*, llvm::SDNode*, llvm::SelectionDAG::DAGUpdateListener*): Assertion `(!From->hasAnyUseOfValue(i) || From->getValueType(i) == To->getValueType(i)) && "Cannot use this version of ReplaceAllUsesWith!"' failed. Stack dump: 0. Running pass 'X86 DAG->DAG Instruction Selection' on function '@_ZN4llvm19AlphaTargetLowering14LowerOperationENS_7SDValueERNS_12SelectionDAGE' g++: Internal error: Aborted (program cc1plus) This occurs when building LLVM using LLVM built by LLVM (via dragonegg). Probably LLVM has miscompiled itself, though it may have miscompiled GCC and/or dragonegg itself: at this point of the self-host build, all of GCC, LLVM and dragonegg were built using LLVM. Unfortunately this kind of thing is extremely hard to debug, and while I did rummage around a bit I didn't find any smoking guns, aka obviously miscompiled code. Found by bisection. r96556 | evancheng | 2010-02-18 03:13:50 +0100 (Thu, 18 Feb 2010) | 5 lines Some dag combiner goodness: Transform br (xor (x, y)) -> br (x != y) Transform br (xor (xor (x,y), 1)) -> br (x == y) Also normalize (and (X, 1) == / != 1 -> (and (X, 1)) != / == 0 to match to "test on x86" and "tst on arm" r96640 | evancheng | 2010-02-19 01:34:39 +0100 (Fri, 19 Feb 2010) | 16 lines Transform (xor (setcc), (setcc)) == / != 1 to (xor (setcc), (setcc)) != / == 1. e.g. On x86_64 %0 = icmp eq i32 %x, 0 %1 = icmp eq i32 %y, 0 %2 = xor i1 %1, %0 br i1 %2, label %bb, label %return => testl %edi, %edi sete %al testl %esi, %esi sete %cl cmpb %al, %cl je LBB1_2 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96672 91177308-0d34-0410-b5e6-96231b3b80d8		2010-02-19 11:30:41 +00:00
..
Analysis
Archive	fix a broken archive that was breaking dejagnu only (not lit)	2010-02-04 07:11:08 +00:00
Assembler	Add support for a union type in LLVM IR. Patch by Talin!	2010-02-12 20:49:41 +00:00
Bindings/Ocaml
Bitcode
BugPoint
CodeGen	Revert commits 96556 and 96640, because commit 96556 breaks the	2010-02-19 11:30:41 +00:00
DebugInfo	Testcase for 94996 (PR 6157)	2010-02-01 22:46:05 +00:00
ExecutionEngine
Feature	Add support for a union type in LLVM IR. Patch by Talin!	2010-02-12 20:49:41 +00:00
FrontendAda
FrontendC	Test case for r96656.	2010-02-19 02:58:33 +00:00
FrontendC++	Ignore target dependent value in grep search.	2010-02-18 19:52:12 +00:00
FrontendFortran
FrontendObjC	Test for 95961.	2010-02-12 02:35:03 +00:00
FrontendObjC++
Integer
lib	Add llvm_supports_darwin_and_target to DejaGNU as well, I'd almost forgotten it	2010-02-03 18:43:46 +00:00
Linker
LLVMC	Revert r96130 ("Forward parameter options as '-option=param'").	2010-02-15 03:17:06 +00:00
MC	make pcrel immediate values relative to the start of the field,	2010-02-16 05:03:17 +00:00
Other	Canonicalize sizeof and alignof on pointer types to a canonical	2010-02-10 06:13:07 +00:00
Scripts
TableGen
Transforms	Fold bswap(undef) to undef.	2010-02-17 00:54:58 +00:00
Unit	Roll back the shared library, r96559. It broke two darwins and arm, mysteriously.	2010-02-18 04:43:02 +00:00
Verifier
CMakeLists.txt
lit.cfg	Get the LLVMC tests working with clang++ by removing the problematic CXXFLAG in lit.	2010-02-04 18:40:11 +00:00
lit.site.cfg.in
Makefile	Roll back the shared library, r96559. It broke two darwins and arm, mysteriously.	2010-02-18 04:43:02 +00:00
Makefile.tests
site.exp.in
TestRunner.sh