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