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| author | Evan Cheng <evan.cheng@apple.com> | 2008-03-13 06:37:55 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2008-03-13 06:37:55 +0000 |
| commit | 875357d213ab1830efa1e3e9de0fcde95df7eefc (patch) | |
| tree | fd11c6f3bf547cb5d103fe4028211b74a85ab10e /test/CodeGen/X86/twoaddr-pass-sink.ll | |
| parent | 6634e26aa11b0e2eabde8b3b463bb943364f8d9d (diff) | |
| download | llvm-875357d213ab1830efa1e3e9de0fcde95df7eefc.tar.gz llvm-875357d213ab1830efa1e3e9de0fcde95df7eefc.tar.bz2 llvm-875357d213ab1830efa1e3e9de0fcde95df7eefc.tar.xz | |
TwoAddressInstructionPass enhancement. After it converts a two address instruction into a 3-address one, sink it past the instruction that kills the read-mod-write register if its definition is used past the kill. This reduces the number of live register by one.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48333 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/twoaddr-pass-sink.ll')
| -rw-r--r-- | test/CodeGen/X86/twoaddr-pass-sink.ll | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/test/CodeGen/X86/twoaddr-pass-sink.ll b/test/CodeGen/X86/twoaddr-pass-sink.ll new file mode 100644 index 0000000000..765588059f --- /dev/null +++ b/test/CodeGen/X86/twoaddr-pass-sink.ll @@ -0,0 +1,29 @@ +; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse2 -stats |& grep {Number of 3-address instructions sunk} + +define void @t2(<2 x i64>* %vDct, <2 x i64>* %vYp, i8* %skiplist, <2 x i64> %a1) nounwind { +entry: + %tmp25 = bitcast <2 x i64> %a1 to <8 x i16> ; <<8 x i16>> [#uses=1] + br label %bb +bb: ; preds = %bb, %entry + %skiplist_addr.0.rec = phi i32 [ 0, %entry ], [ %indvar.next, %bb ] ; <i32> [#uses=3] + %vYp_addr.0.rec = shl i32 %skiplist_addr.0.rec, 3 ; <i32> [#uses=3] + %vDct_addr.0 = getelementptr <2 x i64>* %vDct, i32 %vYp_addr.0.rec ; <<2 x i64>*> [#uses=1] + %vYp_addr.0 = getelementptr <2 x i64>* %vYp, i32 %vYp_addr.0.rec ; <<2 x i64>*> [#uses=1] + %skiplist_addr.0 = getelementptr i8* %skiplist, i32 %skiplist_addr.0.rec ; <i8*> [#uses=1] + %vDct_addr.0.sum43 = or i32 %vYp_addr.0.rec, 1 ; <i32> [#uses=1] + %tmp7 = getelementptr <2 x i64>* %vDct, i32 %vDct_addr.0.sum43 ; <<2 x i64>*> [#uses=1] + %tmp8 = load <2 x i64>* %tmp7, align 16 ; <<2 x i64>> [#uses=1] + %tmp11 = load <2 x i64>* %vDct_addr.0, align 16 ; <<2 x i64>> [#uses=1] + %tmp13 = bitcast <2 x i64> %tmp8 to <8 x i16> ; <<8 x i16>> [#uses=1] + %tmp15 = bitcast <2 x i64> %tmp11 to <8 x i16> ; <<8 x i16>> [#uses=1] + %tmp16 = shufflevector <8 x i16> %tmp15, <8 x i16> %tmp13, <8 x i32> < i32 0, i32 8, i32 1, i32 9, i32 2, i32 10, i32 3, i32 11 > ; <<8 x i16>> [#uses=1] + %tmp26 = mul <8 x i16> %tmp25, %tmp16 ; <<8 x i16>> [#uses=1] + %tmp27 = bitcast <8 x i16> %tmp26 to <2 x i64> ; <<2 x i64>> [#uses=1] + store <2 x i64> %tmp27, <2 x i64>* %vYp_addr.0, align 16 + %tmp37 = load i8* %skiplist_addr.0, align 1 ; <i8> [#uses=1] + %tmp38 = icmp eq i8 %tmp37, 0 ; <i1> [#uses=1] + %indvar.next = add i32 %skiplist_addr.0.rec, 1 ; <i32> [#uses=1] + br i1 %tmp38, label %return, label %bb +return: ; preds = %bb + ret void +} |