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018fb767b9
argument. The generated alloca has to have at least the alignment of the byval, if not, the client may be making assumptions that the new alloca won't satisfy. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122234 91177308-0d34-0410-b5e6-96231b3b80d8
83 lines
2.5 KiB
LLVM
83 lines
2.5 KiB
LLVM
; RUN: opt < %s -inline -S | FileCheck %s
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; Inlining a byval struct should cause an explicit copy into an alloca.
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%struct.ss = type { i32, i64 }
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@.str = internal constant [10 x i8] c"%d, %lld\0A\00" ; <[10 x i8]*> [#uses=1]
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define internal void @f(%struct.ss* byval %b) nounwind {
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entry:
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%tmp = getelementptr %struct.ss* %b, i32 0, i32 0 ; <i32*> [#uses=2]
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%tmp1 = load i32* %tmp, align 4 ; <i32> [#uses=1]
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%tmp2 = add i32 %tmp1, 1 ; <i32> [#uses=1]
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store i32 %tmp2, i32* %tmp, align 4
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ret void
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}
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declare i32 @printf(i8*, ...) nounwind
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define i32 @test1() nounwind {
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entry:
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%S = alloca %struct.ss ; <%struct.ss*> [#uses=4]
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%tmp1 = getelementptr %struct.ss* %S, i32 0, i32 0 ; <i32*> [#uses=1]
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store i32 1, i32* %tmp1, align 8
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%tmp4 = getelementptr %struct.ss* %S, i32 0, i32 1 ; <i64*> [#uses=1]
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store i64 2, i64* %tmp4, align 4
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call void @f( %struct.ss* byval %S ) nounwind
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ret i32 0
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; CHECK: @test1()
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; CHECK: %b = alloca %struct.ss
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; CHECK: call void @llvm.memcpy
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; CHECK: ret i32 0
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}
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; Inlining a byval struct should NOT cause an explicit copy
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; into an alloca if the function is readonly
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define internal i32 @f2(%struct.ss* byval %b) nounwind readonly {
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entry:
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%tmp = getelementptr %struct.ss* %b, i32 0, i32 0 ; <i32*> [#uses=2]
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%tmp1 = load i32* %tmp, align 4 ; <i32> [#uses=1]
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%tmp2 = add i32 %tmp1, 1 ; <i32> [#uses=1]
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ret i32 %tmp2
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}
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define i32 @test2() nounwind {
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entry:
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%S = alloca %struct.ss ; <%struct.ss*> [#uses=4]
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%tmp1 = getelementptr %struct.ss* %S, i32 0, i32 0 ; <i32*> [#uses=1]
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store i32 1, i32* %tmp1, align 8
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%tmp4 = getelementptr %struct.ss* %S, i32 0, i32 1 ; <i64*> [#uses=1]
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store i64 2, i64* %tmp4, align 4
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%X = call i32 @f2( %struct.ss* byval %S ) nounwind
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ret i32 %X
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; CHECK: @test2()
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; CHECK: %S = alloca %struct.ss
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; CHECK-NOT: call void @llvm.memcpy
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; CHECK: ret i32
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}
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; Inlining a byval with an explicit alignment needs to use *at least* that
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; alignment on the generated alloca.
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; PR8769
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declare void @g3(%struct.ss* %p)
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define internal void @f3(%struct.ss* byval align 64 %b) nounwind {
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call void @g3(%struct.ss* %b) ;; Could make alignment assumptions!
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ret void
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}
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define void @test3() nounwind {
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entry:
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%S = alloca %struct.ss, align 1 ;; May not be aligned.
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call void @f3( %struct.ss* byval align 64 %S) nounwind
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ret void
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; CHECK: @test3()
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; CHECK: %b = alloca %struct.ss, align 64
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; CHECK: %S = alloca %struct.ss
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; CHECK: call void @llvm.memcpy
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; CHECK: call void @g3(%struct.ss* %b)
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; CHECK: ret void
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}
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