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| author | Dan Gohman <gohman@apple.com> | 2010-02-12 10:34:29 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2010-02-12 10:34:29 +0000 |
| commit | 572645cf84060c0fc25cb91d38cb9079918b3a88 (patch) | |
| tree | 0571ce42ea03d210844a627baea045fa36f16df5 /test/CodeGen/X86/loop-strength-reduce4.ll | |
| parent | 5cef638855c9f2bb23a9c181cc47ddace8551f50 (diff) | |
| download | llvm-572645cf84060c0fc25cb91d38cb9079918b3a88.tar.gz llvm-572645cf84060c0fc25cb91d38cb9079918b3a88.tar.bz2 llvm-572645cf84060c0fc25cb91d38cb9079918b3a88.tar.xz | |
Reapply the new LoopStrengthReduction code, with compile time and
bug fixes, and with improved heuristics for analyzing foreign-loop
addrecs.
This change also flattens IVUsers, eliminating the stride-oriented
groupings, which makes it easier to work with.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95975 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/loop-strength-reduce4.ll')
| -rw-r--r-- | test/CodeGen/X86/loop-strength-reduce4.ll | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/test/CodeGen/X86/loop-strength-reduce4.ll b/test/CodeGen/X86/loop-strength-reduce4.ll index 07e46eca75..6c0eb8c0df 100644 --- a/test/CodeGen/X86/loop-strength-reduce4.ll +++ b/test/CodeGen/X86/loop-strength-reduce4.ll @@ -1,5 +1,19 @@ -; RUN: llc < %s -march=x86 | grep cmp | grep 64 -; RUN: llc < %s -march=x86 | not grep inc +; RUN: llc < %s -march=x86 -relocation-model=static -mtriple=i686-apple-darwin | FileCheck %s -check-prefix=STATIC +; RUN: llc < %s -march=x86 -relocation-model=pic | FileCheck %s -check-prefix=PIC + +; By starting the IV at -64 instead of 0, a cmp is eliminated, +; as the flags from the add can be used directly. + +; STATIC: movl $-64, %ecx + +; STATIC: movl %eax, _state+76(%ecx) +; STATIC: addl $16, %ecx +; STATIC: jne + +; In PIC mode the symbol can't be folded, so the change-compare-stride +; trick applies. + +; PIC: cmpl $64 @state = external global [0 x i32] ; <[0 x i32]*> [#uses=4] @S = external global [0 x i32] ; <[0 x i32]*> [#uses=4] |