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| author | Richard Osborne <richard@xmos.com> | 2010-03-09 16:07:47 +0000 |
|---|---|---|
| committer | Richard Osborne <richard@xmos.com> | 2010-03-09 16:07:47 +0000 |
| commit | 4d1abd81c10fdba4fa6308ea6dc3c24a49f067de (patch) | |
| tree | 65a9f80a50a344772d1fac2d39a123cbfca4b700 /test/CodeGen/XCore | |
| parent | 3d89ba90d290ec3adab3aa9bda3117fedbde6167 (diff) | |
| download | external_llvm-4d1abd81c10fdba4fa6308ea6dc3c24a49f067de.zip external_llvm-4d1abd81c10fdba4fa6308ea6dc3c24a49f067de.tar.gz external_llvm-4d1abd81c10fdba4fa6308ea6dc3c24a49f067de.tar.bz2 | |
Add DAG combine for ladd / lsub.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98057 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/XCore')
| -rw-r--r-- | test/CodeGen/XCore/ladd_lsub_combine.ll | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/test/CodeGen/XCore/ladd_lsub_combine.ll b/test/CodeGen/XCore/ladd_lsub_combine.ll new file mode 100644 index 0000000..ea9a3b7 --- /dev/null +++ b/test/CodeGen/XCore/ladd_lsub_combine.ll @@ -0,0 +1,28 @@ +; RUN: llvm-as < %s | llc -march=xcore | FileCheck %s + +; Only needs one ladd +define i64 @f1(i32 %x, i32 %y) nounwind { +entry: + %0 = zext i32 %x to i64 ; <i64> [#uses=1] + %1 = zext i32 %y to i64 ; <i64> [#uses=1] + %2 = add i64 %1, %0 ; <i64> [#uses=1] + ret i64 %2 +} +; CHECK: f1: +; CHECK: ldc r2, 0 +; CHECK-NEXT: ladd r1, r0, r1, r0, r2 +; CHECK-NEXT: retsp 0 + +; Only needs one lsub and one neg +define i64 @f2(i32 %x, i32 %y) nounwind { +entry: + %0 = zext i32 %x to i64 ; <i64> [#uses=1] + %1 = zext i32 %y to i64 ; <i64> [#uses=1] + %2 = sub i64 %1, %0 ; <i64> [#uses=1] + ret i64 %2 +} +; CHECK: f2: +; CHECK: ldc r2, 0 +; CHECK-NEXT: lsub r1, r0, r1, r0, r2 +; CHECK-NEXT: neg r1, r1 +; CHECK-NEXT: retsp 0 |