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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 | f4e76cf44de41aba7c55e21be38b261eb586a0cf (patch) | |
| tree | ff7d1ad5fc03c37de8e0bbf91b52bab74327dcc5 /llvm/test | |
| parent | 490075a7ddf14c89327a7576fb09d53ddd8c36ff (diff) | |
| download | bcm5719-llvm-f4e76cf44de41aba7c55e21be38b261eb586a0cf.tar.gz bcm5719-llvm-f4e76cf44de41aba7c55e21be38b261eb586a0cf.zip | |
Add DAG combine for ladd / lsub.
llvm-svn: 98057
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/CodeGen/XCore/ladd_lsub_combine.ll | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/XCore/ladd_lsub_combine.ll b/llvm/test/CodeGen/XCore/ladd_lsub_combine.ll new file mode 100644 index 00000000000..ea9a3b78f2f --- /dev/null +++ b/llvm/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 |
