diff options
Diffstat (limited to 'test/CodeGen/XCore/ladd_lsub_combine.ll')
| -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 |