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- ; RUN: opt -basicaa -sroa -loop-rotate -licm -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* %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" "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" }
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