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| author | Dan Gohman <gohman@apple.com> | 2009-04-16 03:18:22 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-04-16 03:18:22 +0000 |
| commit | 2d1be87ee40a4a0241d94448173879d9df2bc5b3 (patch) | |
| tree | fa16eff022c8808a5eb6aedb159ea653af0faae9 /test/CodeGen/X86/pr3495.ll | |
| parent | 9efac568f08de669c8e0003b33b80998cedaf8b6 (diff) | |
| download | external_llvm-2d1be87ee40a4a0241d94448173879d9df2bc5b3.zip external_llvm-2d1be87ee40a4a0241d94448173879d9df2bc5b3.tar.gz external_llvm-2d1be87ee40a4a0241d94448173879d9df2bc5b3.tar.bz2 | |
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
Diffstat (limited to 'test/CodeGen/X86/pr3495.ll')
| -rw-r--r-- | test/CodeGen/X86/pr3495.ll | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/test/CodeGen/X86/pr3495.ll b/test/CodeGen/X86/pr3495.ll index b7330db..726ad74 100644 --- a/test/CodeGen/X86/pr3495.ll +++ b/test/CodeGen/X86/pr3495.ll @@ -1,5 +1,6 @@ -; RUN: llvm-as < %s | llc -march=x86 -stats |& grep {Number of reloads omited} -; RUN: llvm-as < %s | llc -march=x86 -stats |& grep {Number of available reloads turned into copies} +; RUN: llvm-as < %s | llc -march=x86 -stats |& grep {Number of reloads omited} | grep 2 +; RUN: llvm-as < %s | llc -march=x86 -stats |& not grep {Number of available reloads turned into copies} +; RUN: llvm-as < %s | llc -march=x86 -stats |& grep {Number of machine instrs printed} | grep 39 ; PR3495 target triple = "i386-pc-linux-gnu" |