llvm/lib/CodeGen/SelectionDAG, branch release_22http://llvm.orghttps://git.amat.us/llvm/atom/lib/CodeGen/SelectionDAG?h=release_222008-01-16T23:11:54ZFixes a nasty dag combiner bug that causes a bunch of tests to fail at -O0.2008-01-16T23:11:54ZEvan Chengevan.cheng@apple.com2008-01-16T23:11:54Zurn:sha1:02c42856431562376ac8280b57ad744ba83f1e38
It's not safe to use the two value CombineTo variant to combine away a dead load.
e.g.
v1, chain2 = load chain1, loc
v2, chain3 = load chain2, loc
v3 = add v2, c
Now we replace use of v1 with undef, use of chain2 with chain1.
ReplaceAllUsesWith() will iterate through uses of the first load and update operands:
v1, chain2 = load chain1, loc
v2, chain3 = load chain1, loc
v3 = add v2, c
Now the second load is the same as the first load, SelectionDAG cse will ensure
the use of second load is replaced with the first load.
v1, chain2 = load chain1, loc
v3 = add v1, c
Then v1 is replaced with undef and bad things happen.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46099 91177308-0d34-0410-b5e6-96231b3b80d8
Fix a ppc long double regression I introduced yesterday due to a2008-01-16T17:59:31ZChris Lattnersabre@nondot.org2008-01-16T17:59:31Zurn:sha1:7e2e033e232a3e414040d6b01c8c07a1095a0983
simplification. This fixes automotive-basicmath on PPC.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46072 91177308-0d34-0410-b5e6-96231b3b80d8
merge a few pieces of code that do the store/load to stack 2008-01-16T07:51:34ZChris Lattnersabre@nondot.org2008-01-16T07:51:34Zurn:sha1:a66bb39e9779ce17b7d16e311f4b73fddb2ede2f
pattern to use EmitStackConvert now.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46066 91177308-0d34-0410-b5e6-96231b3b80d8
rename ExpandBIT_CONVERT to EmitStackConvert, generalizing 2008-01-16T07:45:30ZChris Lattnersabre@nondot.org2008-01-16T07:45:30Zurn:sha1:1401d15c99b284ead81b8476a6db95328c5f28fd
it to allow it to emit different load and store kinds.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46065 91177308-0d34-0410-b5e6-96231b3b80d8
simplify a bunch of code by using SelectionDAG::CreateStackTemporary 2008-01-16T07:03:22ZChris Lattnersabre@nondot.org2008-01-16T07:03:22Zurn:sha1:23594d4537fb88a963c6d6993af5027eac9bfbac
instead of inlining its body.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46062 91177308-0d34-0410-b5e6-96231b3b80d8
Change legalizeop of FP_ROUND and FP_EXTEND to not fall through2008-01-16T06:57:07ZChris Lattnersabre@nondot.org2008-01-16T06:57:07Zurn:sha1:f2670a89a7c5e29e7f71ab63e06e75dbf482c55b
into the ANY_EXTEND/ZERO_EXTEND/SIGN_EXTEND code to simplify it.
Unmerge the code for FP_ROUND and FP_EXTEND from each other to
make each one simpler.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46061 91177308-0d34-0410-b5e6-96231b3b80d8
Factor the ReachesChainWithoutSideEffects out of dag combiner into 2008-01-16T05:49:24ZChris Lattnersabre@nondot.org2008-01-16T05:49:24Zurn:sha1:572dee71af1313e6742e1dfd5274fff326b9ef1c
a public SDOperand::reachesChainWithoutSideEffects method. No
functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46050 91177308-0d34-0410-b5e6-96231b3b80d8
The type of the 'abort' node should be pointer type (because2008-01-15T22:09:33ZChris Lattnersabre@nondot.org2008-01-15T22:09:33Zurn:sha1:034f12ea0864a9cca0a74715d6fb06a8bf1dc775
it's a function pointer) not MVT::Other. This fixes builtin_trap
lowering on ppc, alpha, ia64
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46018 91177308-0d34-0410-b5e6-96231b3b80d8
Add support for targets that have a legal ISD::TRAP.2008-01-15T21:58:08ZChris Lattnersabre@nondot.org2008-01-15T21:58:08Zurn:sha1:41bab0beac2600701af99f63e23a6b65f71468ac
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46014 91177308-0d34-0410-b5e6-96231b3b80d8
Oops. Forgot to commit this.2008-01-15T07:49:36ZEvan Chengevan.cheng@apple.com2008-01-15T07:49:36Zurn:sha1:4c46fc6bbf206a59b1b46d8b1af43896a4675c65
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46002 91177308-0d34-0410-b5e6-96231b3b80d8