; RUN: opt -passes='function(gvn-hoist),function(newgvn),function(gvn-hoist)' -S < %s | FileCheck %s ; Test to demonstrate that newgvn creates opportunities for ; more gvn-hoist when sibling branches contain identical expressions. target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" target triple = "x86_64-unknown-linux-gnu" ; Check that all "or" expressions are hoisted. ; CHECK-LABEL: @encode ; CHECK: or i32 ; CHECK-NOT: or i32 define ptr @encode(ptr %p, i32 %v) { entry: %p.addr = alloca ptr, align 8 %v.addr = alloca i32, align 4 store ptr %p, ptr %p.addr, align 8 store i32 %v, ptr %v.addr, align 4 %0 = load i32, ptr %v.addr, align 4 %cmp = icmp ult i32 %0, 23 br i1 %cmp, label %if.then, label %if.else if.then: ; preds = %entry %1 = load i32, ptr %v.addr, align 4 %or = or i32 %1, 128 %conv = trunc i32 %or to i8 %2 = load ptr, ptr %p.addr, align 8 %incdec.ptr = getelementptr inbounds i8, ptr %2, i32 1 store ptr %incdec.ptr, ptr %p.addr, align 8 store i8 %conv, ptr %2, align 1 br label %if.end15 if.else: ; preds = %entry %3 = load i32, ptr %v.addr, align 4 %cmp1 = icmp ult i32 %3, 42 br i1 %cmp1, label %if.then3, label %if.else9 if.then3: ; preds = %if.else %4 = load i32, ptr %v.addr, align 4 %or4 = or i32 %4, 128 %conv5 = trunc i32 %or4 to i8 %5 = load ptr, ptr %p.addr, align 8 %incdec.ptr6 = getelementptr inbounds i8, ptr %5, i32 1 store ptr %incdec.ptr6, ptr %p.addr, align 8 store i8 %conv5, ptr %5, align 1 %6 = load i32, ptr %v.addr, align 4 %conv7 = trunc i32 %6 to i8 %7 = load ptr, ptr %p.addr, align 8 %incdec.ptr8 = getelementptr inbounds i8, ptr %7, i32 1 store ptr %incdec.ptr8, ptr %p.addr, align 8 store i8 %conv7, ptr %7, align 1 br label %if.end if.else9: ; preds = %if.else %8 = load i32, ptr %v.addr, align 4 %or10 = or i32 %8, 128 %conv11 = trunc i32 %or10 to i8 %9 = load ptr, ptr %p.addr, align 8 %incdec.ptr12 = getelementptr inbounds i8, ptr %9, i32 1 store ptr %incdec.ptr12, ptr %p.addr, align 8 store i8 %conv11, ptr %9, align 1 %10 = load i32, ptr %v.addr, align 4 %shr = lshr i32 %10, 7 %conv13 = trunc i32 %shr to i8 %11 = load ptr, ptr %p.addr, align 8 %incdec.ptr14 = getelementptr inbounds i8, ptr %11, i32 1 store ptr %incdec.ptr14, ptr %p.addr, align 8 store i8 %conv13, ptr %11, align 1 br label %if.end if.end: ; preds = %if.else9, %if.then3 br label %if.end15 if.end15: ; preds = %if.end, %if.then %12 = load ptr, ptr %p.addr, align 8 ret ptr %12 }