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llvm-6502/test/CodeGen/SystemZ/alias-01.ll

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Keep TBAA info when rewriting SelectionDAG loads and stores Most SelectionDAG code drops the TBAA info when creating a new form of a load and store (e.g. during legalization, or when converting a plain load to an extending one). This patch tries to catch all cases where the TBAA information can legitimately be carried over. The patch adds alternative forms of getLoad() and getExtLoad() that take a MachineMemOperand instead of individual fields. (The corresponding getTruncStore() already exists.) The idea is to use the MachineMemOperand forms when all fields are carried over (size, pointer info, isVolatile, isNonTemporal, alignment and TBAA info). If some adjustment is being made, e.g. to narrow the load, then we still pass the individual fields but also pass the TBAA info. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193517 91177308-0d34-0410-b5e6-96231b3b80d8
2013-10-28 11:17:59 +00:00
; Test 32-bit ANDs in which the second operand is variable.
;
[SystemZ] Set usaAA to true useAA significantly improves the handling of vector code that has TBAA information attached. It also helps other cases, as shown by the testsuite changes here. The only real downside I've seen is that it interferes with MergeConsecutiveStores. The problem is that that optimization works top down, starting at the first store in the chain, and looks for cases where the chain result is only used by a single related store. These related stores don't alias, so useAA will have rewritten all the later stores to use a different chain input (typically the same one as the first store). I think the advantages outweigh the disadvantages though, so for now I've just disabled alias analysis for the unaligned-01.ll test. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193521 91177308-0d34-0410-b5e6-96231b3b80d8
2013-10-28 13:53:37 +00:00
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
Keep TBAA info when rewriting SelectionDAG loads and stores Most SelectionDAG code drops the TBAA info when creating a new form of a load and store (e.g. during legalization, or when converting a plain load to an extending one). This patch tries to catch all cases where the TBAA information can legitimately be carried over. The patch adds alternative forms of getLoad() and getExtLoad() that take a MachineMemOperand instead of individual fields. (The corresponding getTruncStore() already exists.) The idea is to use the MachineMemOperand forms when all fields are carried over (size, pointer info, isVolatile, isNonTemporal, alignment and TBAA info). If some adjustment is being made, e.g. to narrow the load, then we still pass the individual fields but also pass the TBAA info. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193517 91177308-0d34-0410-b5e6-96231b3b80d8
2013-10-28 11:17:59 +00:00
XFAIL test/CodeGen/SystemZ/alias-01.ll which requires CodeGen TBAA git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@200094 91177308-0d34-0410-b5e6-96231b3b80d8
2014-01-25 19:31:44 +00:00
; The use of TBAA in CodeGen has been temporarily disabled pending correctness fixes.
; XFAIL: *
Keep TBAA info when rewriting SelectionDAG loads and stores Most SelectionDAG code drops the TBAA info when creating a new form of a load and store (e.g. during legalization, or when converting a plain load to an extending one). This patch tries to catch all cases where the TBAA information can legitimately be carried over. The patch adds alternative forms of getLoad() and getExtLoad() that take a MachineMemOperand instead of individual fields. (The corresponding getTruncStore() already exists.) The idea is to use the MachineMemOperand forms when all fields are carried over (size, pointer info, isVolatile, isNonTemporal, alignment and TBAA info). If some adjustment is being made, e.g. to narrow the load, then we still pass the individual fields but also pass the TBAA info. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@193517 91177308-0d34-0410-b5e6-96231b3b80d8
2013-10-28 11:17:59 +00:00
; Check that there are no spills.
define void @f1(<16 x i32> *%src1, <16 x float> *%dest) {
; CHECK-LABEL: f1:
; CHECK-NOT: %r15
; CHECK: br %r14
%val = load <16 x i32> *%src1, !tbaa !1
%add = add <16 x i32> %val, %val
%res = bitcast <16 x i32> %add to <16 x float>
store <16 x float> %res, <16 x float> *%dest, !tbaa !2
ret void
}
!0 = metadata !{ metadata !"root" }
!1 = metadata !{ metadata !"set1", metadata !0 }
!2 = metadata !{ metadata !"set2", metadata !0 }
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