1; RUN: opt -basic-aa -sroa -loop-rotate -licm -S < %s | FileCheck %s 2; RUN: opt -basic-aa -sroa -loop-rotate %s | opt -aa-pipeline=basic-aa -passes='require<aa>,require<targetir>,require<scalar-evolution>,require<opt-remark-emit>,loop(licm)' -S | FileCheck %s 3; RUN: opt -basic-aa -sroa -loop-rotate -licm -enable-mssa-loop-dependency=true -verify-memoryssa -S < %s | FileCheck %s 4; The objects *p and *q are aliased to each other, but even though *q is 5; volatile, *p can be considered invariant in the loop. Check if it is moved 6; out of the loop. 7; CHECK: load i32, i32* %p 8; CHECK: for.body: 9; CHECK: load volatile i32, i32* %q 10 11target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" 12 13; Function Attrs: nounwind uwtable 14define i32 @foo(i32* dereferenceable(4) nonnull %p, i32* %q, i32 %n) #0 { 15entry: 16 %p.addr = alloca i32*, align 8 17 %q.addr = alloca i32*, align 8 18 %n.addr = alloca i32, align 4 19 %i = alloca i32, align 4 20 %s = alloca i32, align 4 21 store i32* %p, i32** %p.addr, align 8 22 store i32* %q, i32** %q.addr, align 8 23 store i32 %n, i32* %n.addr, align 4 24 store i32 0, i32* %s, align 4 25 store i32 0, i32* %i, align 4 26 br label %for.cond 27 28for.cond: ; preds = %for.inc, %entry 29 %0 = load i32, i32* %i, align 4 30 %1 = load i32, i32* %n.addr, align 4 31 %cmp = icmp slt i32 %0, %1 32 br i1 %cmp, label %for.body, label %for.end 33 34for.body: ; preds = %for.cond 35 %2 = load i32*, i32** %p.addr, align 8 36 %3 = load i32, i32* %2, align 4 37 %4 = load i32*, i32** %q.addr, align 8 38 %5 = load volatile i32, i32* %4, align 4 39 %add = add nsw i32 %3, %5 40 %6 = load i32, i32* %s, align 4 41 %add1 = add nsw i32 %6, %add 42 store i32 %add1, i32* %s, align 4 43 br label %for.inc 44 45for.inc: ; preds = %for.body 46 %7 = load i32, i32* %i, align 4 47 %inc = add nsw i32 %7, 1 48 store i32 %inc, i32* %i, align 4 49 br label %for.cond 50 51for.end: ; preds = %for.cond 52 %8 = load i32, i32* %s, align 4 53 ret i32 %8 54} 55 56attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 57