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https://github.com/c64scene-ar/llvm-6502.git
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fea1dd0804
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79992 91177308-0d34-0410-b5e6-96231b3b80d8
29 lines
862 B
LLVM
29 lines
862 B
LLVM
; All of these ands and shifts should be folded into rlw[i]nm instructions
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; RUN: llvm-as < %s | llc -march=ppc32 -o %t
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; RUN: not grep and %t
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; RUN: not grep srawi %t
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; RUN: not grep srwi %t
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; RUN: not grep slwi %t
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; RUN: grep rlwnm %t | count 1
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; RUN: grep rlwinm %t | count 1
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define i32 @test1(i32 %X, i32 %Y) {
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entry:
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%tmp = trunc i32 %Y to i8 ; <i8> [#uses=2]
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%tmp1 = shl i32 %X, %Y ; <i32> [#uses=1]
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%tmp2 = sub i32 32, %Y ; <i8> [#uses=1]
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%tmp3 = lshr i32 %X, %tmp2 ; <i32> [#uses=1]
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%tmp4 = or i32 %tmp1, %tmp3 ; <i32> [#uses=1]
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%tmp6 = and i32 %tmp4, 127 ; <i32> [#uses=1]
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ret i32 %tmp6
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}
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define i32 @test2(i32 %X) {
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entry:
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%tmp1 = lshr i32 %X, 27 ; <i32> [#uses=1]
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%tmp2 = shl i32 %X, 5 ; <i32> [#uses=1]
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%tmp2.masked = and i32 %tmp2, 96 ; <i32> [#uses=1]
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%tmp5 = or i32 %tmp1, %tmp2.masked ; <i32> [#uses=1]
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ret i32 %tmp5
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}
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