diff options
| author | Dale Johannesen <dalej@apple.com> | 2010-12-17 21:45:49 +0000 |
|---|---|---|
| committer | Dale Johannesen <dalej@apple.com> | 2010-12-17 21:45:49 +0000 |
| commit | f5daf8bb7ff9539f7a6e0113609b39e4b9b64ff5 (patch) | |
| tree | 52bc6d7ed0cc8f3aa9f1fe85783ca3761e60d854 /test/CodeGen/X86/x86_64-mul-by-const.ll | |
| parent | 48c166bceb16e578131671ccfb96d35d6fe0db4e (diff) | |
| download | llvm-f5daf8bb7ff9539f7a6e0113609b39e4b9b64ff5.tar.gz llvm-f5daf8bb7ff9539f7a6e0113609b39e4b9b64ff5.tar.bz2 llvm-f5daf8bb7ff9539f7a6e0113609b39e4b9b64ff5.tar.xz | |
Add a transform to DAG Combiner. This improves the
code for the case where 32-bit divide by constant is
turned into 64-bit multiply by constant. 8771012.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122090 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/x86_64-mul-by-const.ll')
| -rw-r--r-- | test/CodeGen/X86/x86_64-mul-by-const.ll | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/test/CodeGen/X86/x86_64-mul-by-const.ll b/test/CodeGen/X86/x86_64-mul-by-const.ll new file mode 100644 index 0000000000..9cda9ab192 --- /dev/null +++ b/test/CodeGen/X86/x86_64-mul-by-const.ll @@ -0,0 +1,9 @@ +; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s +; Formerly there were two shifts. 8771012. + +define i32 @f9188_mul365384439_shift27(i32 %A) nounwind { +; CHECK: imulq $365384439, +; CHECK: shrq $59, %rax + %tmp1 = udiv i32 %A, 1577682821 ; <i32> [#uses=1] + ret i32 %tmp1 +} |