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https://github.com/c64scene-ar/llvm-6502.git
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52 lines
1.7 KiB
LLVM
52 lines
1.7 KiB
LLVM
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; RUN: llvm-as < %s | opt -mem2reg -instcombine | llvm-dis | grep store
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; PR590
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void %zero(sbyte* %p, int %n) {
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entry:
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%p_addr = alloca sbyte* ; <sbyte**> [#uses=2]
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%n_addr = alloca int ; <int*> [#uses=2]
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%i = alloca int ; <int*> [#uses=6]
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%out = alloca int ; <int*> [#uses=2]
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%undef = alloca int ; <int*> [#uses=2]
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store sbyte* %p, sbyte** %p_addr
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store int %n, int* %n_addr
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store int 0, int* %i
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br label %loopentry
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loopentry: ; preds = %endif, %entry
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%tmp.0 = load int* %n_addr ; <int> [#uses=1]
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%tmp.1 = add int %tmp.0, 1 ; <int> [#uses=1]
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%tmp.2 = load int* %i ; <int> [#uses=1]
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%tmp.3 = setgt int %tmp.1, %tmp.2 ; <bool> [#uses=2]
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%tmp.4 = cast bool %tmp.3 to int ; <int> [#uses=0]
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br bool %tmp.3, label %no_exit, label %return
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no_exit: ; preds = %loopentry
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%tmp.5 = load int* %undef ; <int> [#uses=1]
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store int %tmp.5, int* %out
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store int 0, int* %undef
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%tmp.6 = load int* %i ; <int> [#uses=1]
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%tmp.7 = setgt int %tmp.6, 0 ; <bool> [#uses=2]
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%tmp.8 = cast bool %tmp.7 to int ; <int> [#uses=0]
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br bool %tmp.7, label %then, label %endif
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then: ; preds = %no_exit
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%tmp.9 = load sbyte** %p_addr ; <sbyte*> [#uses=1]
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%tmp.10 = load int* %i ; <int> [#uses=1]
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%tmp.11 = sub int %tmp.10, 1 ; <int> [#uses=1]
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%tmp.12 = getelementptr sbyte* %tmp.9, int %tmp.11 ; <sbyte*> [#uses=1]
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%tmp.13 = load int* %out ; <int> [#uses=1]
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%tmp.14 = cast int %tmp.13 to sbyte ; <sbyte> [#uses=1]
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store sbyte %tmp.14, sbyte* %tmp.12
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br label %endif
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endif: ; preds = %then, %no_exit
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%tmp.15 = load int* %i ; <int> [#uses=1]
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%inc = add int %tmp.15, 1 ; <int> [#uses=1]
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store int %inc, int* %i
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br label %loopentry
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return: ; preds = %loopentry
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ret void
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}
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