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| author | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-05-28 10:41:11 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-05-28 10:41:11 +0000 |
| commit | d50bcb2162a529534da42748ab4a418bfc9aaf06 (patch) | |
| tree | fc9a388bd749853d9a65985890f9a81f37391a8b /test/CodeGen/SystemZ/branch-02.ll | |
| parent | fe4716f7cf0bbabb5694fa452f435cec59bbd0e3 (diff) | |
| download | external_llvm-d50bcb2162a529534da42748ab4a418bfc9aaf06.zip external_llvm-d50bcb2162a529534da42748ab4a418bfc9aaf06.tar.gz external_llvm-d50bcb2162a529534da42748ab4a418bfc9aaf06.tar.bz2 | |
[SystemZ] Register compare-and-branch support
This patch adds support for the CRJ and CGRJ instructions. Support for
the immediate forms will be a separate patch.
The architecture has a large number of comparison instructions. I think
it's generally better to concentrate on using the "best" comparison
instruction first and foremost, then only use something like CRJ if
CR really was the natual choice of comparison instruction. The patch
therefore opportunistically converts separate CR and BRC instructions
into a single CRJ while emitting instructions in ISelLowering.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182764 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/SystemZ/branch-02.ll')
| -rw-r--r-- | test/CodeGen/SystemZ/branch-02.ll | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/test/CodeGen/SystemZ/branch-02.ll b/test/CodeGen/SystemZ/branch-02.ll index 9365f16..9f71c05 100644 --- a/test/CodeGen/SystemZ/branch-02.ll +++ b/test/CodeGen/SystemZ/branch-02.ll @@ -1,5 +1,6 @@ ; Test all condition-code masks that are relevant for signed integer -; comparisons. +; comparisons, in cases where a separate branch is better than COMPARE +; AND BRANCH. ; ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s |