| ; 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-mssa(licm)' -S | FileCheck %s |
| ; RUN: opt -basic-aa -sroa -loop-rotate -licm -verify-memoryssa -S < %s | FileCheck %s |
| ; The objects *p and *q are aliased to each other, but even though *q is |
| ; volatile, *p can be considered invariant in the loop. Check if it is moved |
| ; out of the loop. |
| ; CHECK: load i32, i32* %p |
| ; CHECK: for.body: |
| ; CHECK: load volatile i32, i32* %q |
| |
| 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" |
| |
| ; Function Attrs: nounwind uwtable |
| define i32 @foo(i32* dereferenceable(4) nonnull %p, i32* %q, i32 %n) #0 { |
| entry: |
| %p.addr = alloca i32*, align 8 |
| %q.addr = alloca i32*, align 8 |
| %n.addr = alloca i32, align 4 |
| %i = alloca i32, align 4 |
| %s = alloca i32, align 4 |
| store i32* %p, i32** %p.addr, align 8 |
| store i32* %q, i32** %q.addr, align 8 |
| store i32 %n, i32* %n.addr, align 4 |
| store i32 0, i32* %s, align 4 |
| store i32 0, i32* %i, align 4 |
| br label %for.cond |
| |
| for.cond: ; preds = %for.inc, %entry |
| %0 = load i32, i32* %i, align 4 |
| %1 = load i32, i32* %n.addr, align 4 |
| %cmp = icmp slt i32 %0, %1 |
| br i1 %cmp, label %for.body, label %for.end |
| |
| for.body: ; preds = %for.cond |
| %2 = load i32*, i32** %p.addr, align 8 |
| %3 = load i32, i32* %2, align 4 |
| %4 = load i32*, i32** %q.addr, align 8 |
| %5 = load volatile i32, i32* %4, align 4 |
| %add = add nsw i32 %3, %5 |
| %6 = load i32, i32* %s, align 4 |
| %add1 = add nsw i32 %6, %add |
| store i32 %add1, i32* %s, align 4 |
| br label %for.inc |
| |
| for.inc: ; preds = %for.body |
| %7 = load i32, i32* %i, align 4 |
| %inc = add nsw i32 %7, 1 |
| store i32 %inc, i32* %i, align 4 |
| br label %for.cond |
| |
| for.end: ; preds = %for.cond |
| %8 = load i32, i32* %s, align 4 |
| ret i32 %8 |
| } |
| |
| attributes #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" } |