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https://github.com/c64scene-ar/llvm-6502.git
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4cb81bdd56
extractelement operations into a bitcast of the pointer, then a gep, then a scalar load. Disable this when the vector only has one element, because it leads to infinite loops in instcombine (PR4908). This transformation seems like a really bad idea to me, as it will likely disable CSE of vector load/stores etc and can be better done in the code generator when profitable. This goes all the way back to the first days of packed types, r25299 specifically. I'll let those people who care about the performance of vector code decide what to do with this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81185 91177308-0d34-0410-b5e6-96231b3b80d8
47 lines
2.0 KiB
LLVM
47 lines
2.0 KiB
LLVM
; RUN: opt < %s -instcombine | llvm-dis
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
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target triple = "i386-apple-darwin10.0"
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define i32 @test0(i8 %tmp2) ssp {
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entry:
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%tmp3 = zext i8 %tmp2 to i32
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%tmp8 = lshr i32 %tmp3, 6
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%tmp9 = lshr i32 %tmp3, 7
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%tmp10 = xor i32 %tmp9, 67108858
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%tmp11 = xor i32 %tmp10, %tmp8
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%tmp12 = xor i32 %tmp11, 0
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ret i32 %tmp12
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}
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; PR4905
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define <2 x i64> @test1(<2 x i64> %x, <2 x i64> %y) nounwind {
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entry:
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%conv.i94 = bitcast <2 x i64> %y to <4 x i32> ; <<4 x i32>> [#uses=1]
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%sub.i97 = sub <4 x i32> %conv.i94, undef ; <<4 x i32>> [#uses=1]
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%conv3.i98 = bitcast <4 x i32> %sub.i97 to <2 x i64> ; <<2 x i64>> [#uses=2]
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%conv2.i86 = bitcast <2 x i64> %conv3.i98 to <4 x i32> ; <<4 x i32>> [#uses=1]
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%cmp.i87 = icmp sgt <4 x i32> undef, %conv2.i86 ; <<4 x i1>> [#uses=1]
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%sext.i88 = sext <4 x i1> %cmp.i87 to <4 x i32> ; <<4 x i32>> [#uses=1]
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%conv3.i89 = bitcast <4 x i32> %sext.i88 to <2 x i64> ; <<2 x i64>> [#uses=1]
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%and.i = and <2 x i64> %conv3.i89, %conv3.i98 ; <<2 x i64>> [#uses=1]
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%or.i = or <2 x i64> zeroinitializer, %and.i ; <<2 x i64>> [#uses=1]
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%conv2.i43 = bitcast <2 x i64> %or.i to <4 x i32> ; <<4 x i32>> [#uses=1]
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%sub.i = sub <4 x i32> zeroinitializer, %conv2.i43 ; <<4 x i32>> [#uses=1]
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%conv3.i44 = bitcast <4 x i32> %sub.i to <2 x i64> ; <<2 x i64>> [#uses=1]
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ret <2 x i64> %conv3.i44
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}
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; PR4908
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define void @test2(<1 x i16>* nocapture %b, i32* nocapture %c) nounwind ssp {
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entry:
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%arrayidx = getelementptr inbounds <1 x i16>* %b, i64 undef ; <<1 x i16>*>
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%tmp2 = load <1 x i16>* %arrayidx ; <<1 x i16>> [#uses=1]
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%tmp6 = bitcast <1 x i16> %tmp2 to i16 ; <i16> [#uses=1]
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%tmp7 = zext i16 %tmp6 to i32 ; <i32> [#uses=1]
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%ins = or i32 0, %tmp7 ; <i32> [#uses=1]
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%arrayidx20 = getelementptr inbounds i32* %c, i64 undef ; <i32*> [#uses=1]
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store i32 %ins, i32* %arrayidx20
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ret void
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}
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