Commit Graph

8 Commits

Author SHA1 Message Date
Dan Gohman
2d1be87ee4 Expand GEPs in ScalarEvolution expressions. SCEV expressions can now
have pointer types, though in contrast to C pointer types, SCEV
addition is never implicitly scaled. This not only eliminates the
need for special code like IndVars' EliminatePointerRecurrence
and LSR's own GEP expansion code, it also does a better job because
it lets the normal optimizations handle pointer expressions just
like integer expressions.

Also, since LLVM IR GEPs can't directly index into multi-dimensional
VLAs, moving the GEP analysis out of client code and into the SCEV
framework makes it easier for clients to handle multi-dimensional
VLAs the same way as other arrays.

Some existing regression tests show improved optimization.
test/CodeGen/ARM/2007-03-13-InstrSched.ll in particular improved to
the point where if-conversion started kicking in; I turned it off
for this test to preserve the intent of the test.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@69258 91177308-0d34-0410-b5e6-96231b3b80d8
2009-04-16 03:18:22 +00:00
Evan Cheng
e3c1cfb181 Remove xfail. This is fixed.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45254 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-20 02:25:21 +00:00
Tanya Lattner
727842e9d7 Fix bug in regression tests that ignored stderr output in RUN lines. Updated tests and fixed broken run lines.
XFAILed 3 arm regressions (will file bugs)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44389 91177308-0d34-0410-b5e6-96231b3b80d8
2007-11-28 04:57:00 +00:00
Reid Spencer
4cda190ef5 For PR1319:
Fix test syntax per new rules.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36133 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-16 15:15:52 +00:00
Evan Cheng
1c89bd10b3 Better still.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35663 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-04 08:49:40 +00:00
Evan Cheng
96598233fc These got better.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35661 91177308-0d34-0410-b5e6-96231b3b80d8
2007-04-04 07:41:15 +00:00
Evan Cheng
8f7d26bce7 ARM isel should match ldr x +/- x * (2^n) to ldr [x, +/- x, lsl #log2(n)].
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35114 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-14 23:26:40 +00:00
Evan Cheng
507e639b2e New test.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35091 91177308-0d34-0410-b5e6-96231b3b80d8
2007-03-13 23:31:47 +00:00