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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 | 7b871b3464a5f84f8984786c665f70f5384fb0d6 (patch) | |
| tree | 65a9f80a50a344772d1fac2d39a123cbfca4b700 /test | |
| parent | 7ebc3777de7a60a87d6a17a17788f42aa94717fa (diff) | |
| download | external_llvm-7b871b3464a5f84f8984786c665f70f5384fb0d6.zip external_llvm-7b871b3464a5f84f8984786c665f70f5384fb0d6.tar.gz external_llvm-7b871b3464a5f84f8984786c665f70f5384fb0d6.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')
| -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 |