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| author | Richard Osborne <richard@xmos.com> | 2010-03-10 18:12:27 +0000 |
|---|---|---|
| committer | Richard Osborne <richard@xmos.com> | 2010-03-10 18:12:27 +0000 |
| commit | 850f1cd3c0c6feefd64f389ecb0e078d0b2bd9db (patch) | |
| tree | 0868723515ac4101d0872fbada972a9418ce606f /test/CodeGen/XCore | |
| parent | 0965200ac21fb481557f256c86d057df13bbb55e (diff) | |
| download | external_llvm-850f1cd3c0c6feefd64f389ecb0e078d0b2bd9db.zip external_llvm-850f1cd3c0c6feefd64f389ecb0e078d0b2bd9db.tar.gz external_llvm-850f1cd3c0c6feefd64f389ecb0e078d0b2bd9db.tar.bz2 | |
Handle MVT::i64 type in DAG combine for ISD::ADD. Fold 64 bit
expression add(add(mul(x,y),a),b) -> lmul(x,y,a,b) if all
operands are zero extended.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98168 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/XCore')
| -rw-r--r-- | test/CodeGen/XCore/addsub64.ll | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/test/CodeGen/XCore/addsub64.ll b/test/CodeGen/XCore/addsub64.ll index 0432e5e..d062480 100644 --- a/test/CodeGen/XCore/addsub64.ll +++ b/test/CodeGen/XCore/addsub64.ll @@ -42,3 +42,18 @@ entry: ; CHECK: maccs: ; CHECK: maccs r1, r0, r3, r2 ; CHECK-NEXT: retsp 0 + +define i64 @lmul(i32 %a, i32 %b, i32 %c, i32 %d) { +entry: + %0 = zext i32 %a to i64 + %1 = zext i32 %b to i64 + %2 = zext i32 %c to i64 + %3 = zext i32 %d to i64 + %4 = mul i64 %1, %0 + %5 = add i64 %4, %2 + %6 = add i64 %5, %3 + ret i64 %6 +} +; CHECK: lmul: +; CHECK: lmul r1, r0, r1, r0, r2, r3 +; CHECK-NEXT: retsp 0 |