derek.holloway
7502bf64a4
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54 lines
2.0 KiB
LLVM
54 lines
2.0 KiB
LLVM
; RUN: opt -passes='sroa,loop(loop-rotate)' %s | opt -aa-pipeline=basic-aa -passes='require<aa>,require<target-ir>,require<scalar-evolution>,require<opt-remark-emit>,loop-mssa(licm)' -S | FileCheck %s
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; RUN: opt -passes='sroa,loop(loop-rotate),loop-mssa(licm)' -verify-memoryssa -S < %s | FileCheck %s
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; The objects *p and *q are aliased to each other, but even though *q is
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; volatile, *p can be considered invariant in the loop. Check if it is moved
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; out of the loop.
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; CHECK: load i32, ptr %p
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; CHECK: for.body:
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; CHECK: load volatile i32, ptr %q
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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"
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; Function Attrs: nounwind uwtable
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define i32 @foo(ptr dereferenceable(4) nonnull %p, ptr %q, i32 %n) {
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entry:
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%p.addr = alloca ptr, align 8
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%q.addr = alloca ptr, align 8
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%n.addr = alloca i32, align 4
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%i = alloca i32, align 4
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%s = alloca i32, align 4
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store ptr %p, ptr %p.addr, align 8
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store ptr %q, ptr %q.addr, align 8
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store i32 %n, ptr %n.addr, align 4
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store i32 0, ptr %s, align 4
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store i32 0, ptr %i, align 4
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br label %for.cond
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for.cond: ; preds = %for.inc, %entry
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%0 = load i32, ptr %i, align 4
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%1 = load i32, ptr %n.addr, align 4
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%cmp = icmp slt i32 %0, %1
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br i1 %cmp, label %for.body, label %for.end
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for.body: ; preds = %for.cond
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%2 = load ptr, ptr %p.addr, align 8
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%3 = load i32, ptr %2, align 4
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%4 = load ptr, ptr %q.addr, align 8
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%5 = load volatile i32, ptr %4, align 4
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%add = add nsw i32 %3, %5
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%6 = load i32, ptr %s, align 4
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%add1 = add nsw i32 %6, %add
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store i32 %add1, ptr %s, align 4
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br label %for.inc
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for.inc: ; preds = %for.body
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%7 = load i32, ptr %i, align 4
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%inc = add nsw i32 %7, 1
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store i32 %inc, ptr %i, align 4
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br label %for.cond
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for.end: ; preds = %for.cond
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%8 = load i32, ptr %s, align 4
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ret i32 %8
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}
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