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| author | Anton Korobeynikov <asl@math.spbu.ru> | 2010-05-15 18:16:59 +0000 |
|---|---|---|
| committer | Anton Korobeynikov <asl@math.spbu.ru> | 2010-05-15 18:16:59 +0000 |
| commit | a9790d739a7970dd516c57f56d67cf9aa01b9d39 (patch) | |
| tree | 6a7eb2a2910127a06b9c5d685db6be827f8cbf1f /test/CodeGen/ARM/mul_const.ll | |
| parent | 418d1d954daf87965757f5aa5bf8d546d3e40a82 (diff) | |
Some cheap DAG combine goodness for multiplication with a particular constant.
This can be extended later on to handle more "complex" constants.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103881 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/ARM/mul_const.ll')
| -rw-r--r-- | test/CodeGen/ARM/mul_const.ll | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/test/CodeGen/ARM/mul_const.ll b/test/CodeGen/ARM/mul_const.ll index 93188cdd88..8c10246461 100644 --- a/test/CodeGen/ARM/mul_const.ll +++ b/test/CodeGen/ARM/mul_const.ll @@ -1,17 +1,43 @@ ; RUN: llc < %s -march=arm | FileCheck %s -define i32 @t1(i32 %v) nounwind readnone { +define i32 @t9(i32 %v) nounwind readnone { entry: -; CHECK: t1: +; CHECK: t9: ; CHECK: add r0, r0, r0, lsl #3 %0 = mul i32 %v, 9 ret i32 %0 } -define i32 @t2(i32 %v) nounwind readnone { +define i32 @t7(i32 %v) nounwind readnone { entry: -; CHECK: t2: +; CHECK: t7: ; CHECK: rsb r0, r0, r0, lsl #3 %0 = mul i32 %v, 7 ret i32 %0 } + +define i32 @t5(i32 %v) nounwind readnone { +entry: +; CHECK: t5: +; CHECK: add r0, r0, r0, lsl #2 + %0 = mul i32 %v, 5 + ret i32 %0 +} + +define i32 @t3(i32 %v) nounwind readnone { +entry: +; CHECK: t3: +; CHECK: add r0, r0, r0, lsl #1 + %0 = mul i32 %v, 3 + ret i32 %0 +} + +define i32 @t12288(i32 %v) nounwind readnone { +entry: +; CHECK: t12288: +; CHECK: add r0, r0, r0, lsl #1 +; CHECK: mov r0, r0, lsl #12 + %0 = mul i32 %v, 12288 + ret i32 %0 +} + |