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| author | David Goodwin <david_goodwin@apple.com> | 2009-06-26 23:13:13 +0000 |
|---|---|---|
| committer | David Goodwin <david_goodwin@apple.com> | 2009-06-26 23:13:13 +0000 |
| commit | dcdaebc592cad9bc23652e3b9fdb552d63bbeb9f (patch) | |
| tree | 9a377a21d726d7040f2087ed7c50dbeb7a2c6fce | |
| parent | 16bdfdb1784767e82f235183b1b5f6338df4bf9e (diff) | |
| download | external_llvm-dcdaebc592cad9bc23652e3b9fdb552d63bbeb9f.zip external_llvm-dcdaebc592cad9bc23652e3b9fdb552d63bbeb9f.tar.gz external_llvm-dcdaebc592cad9bc23652e3b9fdb552d63bbeb9f.tar.bz2 | |
When possible, use "mvn ra, rb" instead of "eor ra, rb, -1" because mvn has a narrow version and eor(i) does not.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74355 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/ARM/ARMInstrThumb2.td | 2 | ||||
| -rw-r--r-- | test/CodeGen/Thumb2/thumb2-mvn2.ll | 11 |
2 files changed, 13 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMInstrThumb2.td b/lib/Target/ARM/ARMInstrThumb2.td index c965d1d..c2dd3a8 100644 --- a/lib/Target/ARM/ARMInstrThumb2.td +++ b/lib/Target/ARM/ARMInstrThumb2.td @@ -482,6 +482,8 @@ defm t2ORN : T2I_bin_irs<"orn", BinOpFrag<(or node:$LHS, (not node:$RHS))>>; def : Thumb2Pat<(or GPR:$src, t2_so_imm_not:$imm), (t2ORNri GPR:$src, t2_so_imm_not:$imm)>; +// Prefer over of t2EORri ra, rb, -1 because mvn has 16-bit version +let AddedComplexity = 1 in defm t2MVN : T2I_un_irs <"mvn", UnOpFrag<(not node:$Src)>, 1, 1>; def : Thumb2Pat<(t2_so_imm_not:$src), diff --git a/test/CodeGen/Thumb2/thumb2-mvn2.ll b/test/CodeGen/Thumb2/thumb2-mvn2.ll new file mode 100644 index 0000000..178f02b --- /dev/null +++ b/test/CodeGen/Thumb2/thumb2-mvn2.ll @@ -0,0 +1,11 @@ +; RUN: llvm-as < %s | llc -march=thumb -mattr=+thumb2 | grep {mvn\\W*r\[0-9\]*,\\W*r\[0-9\]*} | count 2 + +define i32 @f1(i32 %a) { + %tmp = xor i32 4294967295, %a + ret i32 %tmp +} + +define i32 @f2(i32 %a) { + %tmp = xor i32 %a, 4294967295 + ret i32 %tmp +} |