2016-07-28 04:50:42 +08:00
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; RUN: llc -march=hexagon < %s | FileCheck %s
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; Check that the load/store to the volatile stack object has not been
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; optimized away.
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target triple = "hexagon"
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; CHECK-LABEL: foo
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; CHECK: memw(r29+#4) =
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2017-02-10 23:33:13 +08:00
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; CHECK: = memw(r29+#4)
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2016-07-28 04:50:42 +08:00
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define i32 @foo(i32 %a) #0 {
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entry:
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%x = alloca i32, align 4
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%x.0.x.0..sroa_cast = bitcast i32* %x to i8*
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2017-04-11 04:18:21 +08:00
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call void @llvm.lifetime.start.p0i8(i64 4, i8* %x.0.x.0..sroa_cast)
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2016-07-28 04:50:42 +08:00
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store volatile i32 0, i32* %x, align 4
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%call = tail call i32 bitcast (i32 (...)* @bar to i32 ()*)() #0
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%x.0.x.0. = load volatile i32, i32* %x, align 4
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%add = add nsw i32 %x.0.x.0., %a
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2017-04-11 04:18:21 +08:00
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call void @llvm.lifetime.end.p0i8(i64 4, i8* %x.0.x.0..sroa_cast)
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2016-07-28 04:50:42 +08:00
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ret i32 %add
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}
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2017-04-11 04:18:21 +08:00
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declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1
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declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1
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2016-07-28 04:50:42 +08:00
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declare i32 @bar(...) #0
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attributes #0 = { nounwind }
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attributes #1 = { argmemonly nounwind }
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