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37 lines
1.1 KiB
LLVM
37 lines
1.1 KiB
LLVM
; RUN: opt < %s -analyze -scalar-evolution |& not grep smax
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; PR2261
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@lut = common global [256 x i8] zeroinitializer, align 32 ; <[256 x i8]*> [#uses=1]
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define void @foo(i32 %count, i32* %srcptr, i32* %dstptr) nounwind {
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entry:
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icmp sgt i32 %count, 0 ; <i1>:0 [#uses=1]
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br i1 %0, label %bb.nph, label %return
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bb.nph: ; preds = %entry
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br label %bb
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bb: ; preds = %bb1, %bb.nph
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%j.01 = phi i32 [ %8, %bb1 ], [ 0, %bb.nph ] ; <i32> [#uses=1]
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load i32* %srcptr, align 4 ; <i32>:1 [#uses=2]
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and i32 %1, 255 ; <i32>:2 [#uses=1]
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and i32 %1, -256 ; <i32>:3 [#uses=1]
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getelementptr [256 x i8]* @lut, i32 0, i32 %2 ; <i8*>:4 [#uses=1]
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load i8* %4, align 1 ; <i8>:5 [#uses=1]
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zext i8 %5 to i32 ; <i32>:6 [#uses=1]
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or i32 %6, %3 ; <i32>:7 [#uses=1]
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store i32 %7, i32* %dstptr, align 4
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add i32 %j.01, 1 ; <i32>:8 [#uses=2]
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br label %bb1
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bb1: ; preds = %bb
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icmp slt i32 %8, %count ; <i1>:9 [#uses=1]
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br i1 %9, label %bb, label %bb1.return_crit_edge
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bb1.return_crit_edge: ; preds = %bb1
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br label %return
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return: ; preds = %bb1.return_crit_edge, %entry
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ret void
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}
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