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29 lines
1.1 KiB
LLVM
29 lines
1.1 KiB
LLVM
; RUN: llc < %s -march=x86 | grep shrl
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; Bug in FindModifiedNodeSlot cause tmp14 load to become a zextload and shr 31
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; is then optimized away.
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@tree_code_type = external global [0 x i32] ; <[0 x i32]*> [#uses=1]
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define void @copy_if_shared_r() {
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%tmp = load i32* null ; <i32> [#uses=1]
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%tmp56 = and i32 %tmp, 255 ; <i32> [#uses=1]
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%gep.upgrd.1 = zext i32 %tmp56 to i64 ; <i64> [#uses=1]
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%tmp8 = getelementptr [0 x i32]* @tree_code_type, i32 0, i64 %gep.upgrd.1 ; <i32*> [#uses=1]
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%tmp9 = load i32* %tmp8 ; <i32> [#uses=1]
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%tmp10 = add i32 %tmp9, -1 ; <i32> [#uses=1]
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%tmp.upgrd.2 = icmp ugt i32 %tmp10, 2 ; <i1> [#uses=1]
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%tmp14 = load i32* null ; <i32> [#uses=1]
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%tmp15 = lshr i32 %tmp14, 31 ; <i32> [#uses=1]
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%tmp15.upgrd.3 = trunc i32 %tmp15 to i8 ; <i8> [#uses=1]
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%tmp16 = icmp ne i8 %tmp15.upgrd.3, 0 ; <i1> [#uses=1]
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br i1 %tmp.upgrd.2, label %cond_false25, label %cond_true
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cond_true: ; preds = %0
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br i1 %tmp16, label %cond_true17, label %cond_false
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cond_true17: ; preds = %cond_true
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ret void
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cond_false: ; preds = %cond_true
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ret void
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cond_false25: ; preds = %0
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ret void
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}
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