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1; RUN: opt -passes='function(gvn-hoist),function(newgvn),function(gvn-hoist)' -S < %s | FileCheck %s2; Test to demonstrate that newgvn creates opportunities for3; more gvn-hoist when sibling branches contain identical expressions.4 5target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"6target triple = "x86_64-unknown-linux-gnu"7 8; Check that all "or" expressions are hoisted.9; CHECK-LABEL: @encode10; CHECK: or i3211; CHECK-NOT: or i3212 13define ptr @encode(ptr %p, i32 %v) {14entry:15 %p.addr = alloca ptr, align 816 %v.addr = alloca i32, align 417 store ptr %p, ptr %p.addr, align 818 store i32 %v, ptr %v.addr, align 419 %0 = load i32, ptr %v.addr, align 420 %cmp = icmp ult i32 %0, 2321 br i1 %cmp, label %if.then, label %if.else22 23if.then: ; preds = %entry24 %1 = load i32, ptr %v.addr, align 425 %or = or i32 %1, 12826 %conv = trunc i32 %or to i827 %2 = load ptr, ptr %p.addr, align 828 %incdec.ptr = getelementptr inbounds i8, ptr %2, i32 129 store ptr %incdec.ptr, ptr %p.addr, align 830 store i8 %conv, ptr %2, align 131 br label %if.end1532 33if.else: ; preds = %entry34 %3 = load i32, ptr %v.addr, align 435 %cmp1 = icmp ult i32 %3, 4236 br i1 %cmp1, label %if.then3, label %if.else937 38if.then3: ; preds = %if.else39 %4 = load i32, ptr %v.addr, align 440 %or4 = or i32 %4, 12841 %conv5 = trunc i32 %or4 to i842 %5 = load ptr, ptr %p.addr, align 843 %incdec.ptr6 = getelementptr inbounds i8, ptr %5, i32 144 store ptr %incdec.ptr6, ptr %p.addr, align 845 store i8 %conv5, ptr %5, align 146 %6 = load i32, ptr %v.addr, align 447 %conv7 = trunc i32 %6 to i848 %7 = load ptr, ptr %p.addr, align 849 %incdec.ptr8 = getelementptr inbounds i8, ptr %7, i32 150 store ptr %incdec.ptr8, ptr %p.addr, align 851 store i8 %conv7, ptr %7, align 152 br label %if.end53 54if.else9: ; preds = %if.else55 %8 = load i32, ptr %v.addr, align 456 %or10 = or i32 %8, 12857 %conv11 = trunc i32 %or10 to i858 %9 = load ptr, ptr %p.addr, align 859 %incdec.ptr12 = getelementptr inbounds i8, ptr %9, i32 160 store ptr %incdec.ptr12, ptr %p.addr, align 861 store i8 %conv11, ptr %9, align 162 %10 = load i32, ptr %v.addr, align 463 %shr = lshr i32 %10, 764 %conv13 = trunc i32 %shr to i865 %11 = load ptr, ptr %p.addr, align 866 %incdec.ptr14 = getelementptr inbounds i8, ptr %11, i32 167 store ptr %incdec.ptr14, ptr %p.addr, align 868 store i8 %conv13, ptr %11, align 169 br label %if.end70 71if.end: ; preds = %if.else9, %if.then372 br label %if.end1573 74if.end15: ; preds = %if.end, %if.then75 %12 = load ptr, ptr %p.addr, align 876 ret ptr %1277}78