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| author | Anton Korobeynikov <asl@math.spbu.ru> | 2012-03-19 19:19:50 +0000 |
|---|---|---|
| committer | Anton Korobeynikov <asl@math.spbu.ru> | 2012-03-19 19:19:50 +0000 |
| commit | 2d7ea04e2822bbe5faad0eefceb7a300ea01224e (patch) | |
| tree | d37e72d8497c9880c5764f35ae50eecc738b2a8a /test | |
| parent | 23f1cbbd686513ae5defbd3afdf5e286befe8a76 (diff) | |
| download | llvm-2d7ea04e2822bbe5faad0eefceb7a300ea01224e.tar.gz llvm-2d7ea04e2822bbe5faad0eefceb7a300ea01224e.tar.bz2 llvm-2d7ea04e2822bbe5faad0eefceb7a300ea01224e.tar.xz | |
Perform mul combine when multiplying wiht negative constants.
Patch by Weiming Zhao!
This fixes PR12212
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153049 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/ARM/mul_const.ll | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/mul_const.ll b/test/CodeGen/ARM/mul_const.ll index 3cb8a8e816..c50a233546 100644 --- a/test/CodeGen/ARM/mul_const.ll +++ b/test/CodeGen/ARM/mul_const.ll @@ -41,3 +41,45 @@ entry: ret i32 %0 } +define i32 @tn9(i32 %v) nounwind readnone { +entry: +; CHECK: tn9: +; CHECK: add r0, r0, r0, lsl #3 +; CHECK: rsb r0, r0, #0 + %0 = mul i32 %v, -9 + ret i32 %0 +} + +define i32 @tn7(i32 %v) nounwind readnone { +entry: +; CHECK: tn7: +; CHECK: sub r0, r0, r0, lsl #3 + %0 = mul i32 %v, -7 + ret i32 %0 +} + +define i32 @tn5(i32 %v) nounwind readnone { +entry: +; CHECK: tn5: +; CHECK: add r0, r0, r0, lsl #2 +; CHECK: rsb r0, r0, #0 + %0 = mul i32 %v, -5 + ret i32 %0 +} + +define i32 @tn3(i32 %v) nounwind readnone { +entry: +; CHECK: tn3: +; CHECK: sub r0, r0, r0, lsl #2 + %0 = mul i32 %v, -3 + ret i32 %0 +} + +define i32 @tn12288(i32 %v) nounwind readnone { +entry: +; CHECK: tn12288: +; CHECK: sub r0, r0, r0, lsl #2 +; CHECK: lsl{{.*}}#12 + %0 = mul i32 %v, -12288 + ret i32 %0 +} |