-; RUN: opt %s -inline | llvm-dis | grep {llvm.memcpy}
+; RUN: opt < %s -inline -S | FileCheck %s
; Inlining a byval struct should cause an explicit copy into an alloca.
declare i32 @printf(i8*, ...) nounwind
-define i32 @main() nounwind {
+define i32 @test1() nounwind {
entry:
%S = alloca %struct.ss ; <%struct.ss*> [#uses=4]
%tmp1 = getelementptr %struct.ss* %S, i32 0, i32 0 ; <i32*> [#uses=1]
store i64 2, i64* %tmp4, align 4
call void @f( %struct.ss* byval %S ) nounwind
ret i32 0
+; CHECK: @test1()
+; CHECK: %S1 = alloca %struct.ss
+; CHECK: %S = alloca %struct.ss
+; CHECK: call void @llvm.memcpy
+; CHECK: ret i32 0
+}
+
+; Inlining a byval struct should NOT cause an explicit copy
+; into an alloca if the function is readonly
+
+define internal i32 @f2(%struct.ss* byval %b) nounwind readonly {
+entry:
+ %tmp = getelementptr %struct.ss* %b, i32 0, i32 0 ; <i32*> [#uses=2]
+ %tmp1 = load i32* %tmp, align 4 ; <i32> [#uses=1]
+ %tmp2 = add i32 %tmp1, 1 ; <i32> [#uses=1]
+ ret i32 %tmp2
+}
+
+define i32 @test2() nounwind {
+entry:
+ %S = alloca %struct.ss ; <%struct.ss*> [#uses=4]
+ %tmp1 = getelementptr %struct.ss* %S, i32 0, i32 0 ; <i32*> [#uses=1]
+ store i32 1, i32* %tmp1, align 8
+ %tmp4 = getelementptr %struct.ss* %S, i32 0, i32 1 ; <i64*> [#uses=1]
+ store i64 2, i64* %tmp4, align 4
+ %X = call i32 @f2( %struct.ss* byval %S ) nounwind
+ ret i32 %X
+; CHECK: @test2()
+; CHECK: %S = alloca %struct.ss
+; CHECK-NOT: call void @llvm.memcpy
+; CHECK: ret i32
+}
+
+
+; Inlining a byval with an explicit alignment needs to use *at least* that
+; alignment on the generated alloca.
+; PR8769
+declare void @g3(%struct.ss* %p)
+
+define internal void @f3(%struct.ss* byval align 64 %b) nounwind {
+ call void @g3(%struct.ss* %b) ;; Could make alignment assumptions!
+ ret void
+}
+
+define void @test3() nounwind {
+entry:
+ %S = alloca %struct.ss, align 1 ;; May not be aligned.
+ call void @f3( %struct.ss* byval align 64 %S) nounwind
+ ret void
+; CHECK: @test3()
+; CHECK: %S1 = alloca %struct.ss, align 64
+; CHECK: %S = alloca %struct.ss
+; CHECK: call void @llvm.memcpy
+; CHECK: call void @g3(%struct.ss* %S1)
+; CHECK: ret void
+}
+
+
+; Inlining a byval struct should NOT cause an explicit copy
+; into an alloca if the function is readonly, but should increase an alloca's
+; alignment to satisfy an explicit alignment request.
+
+define internal i32 @f4(%struct.ss* byval align 64 %b) nounwind readonly {
+ call void @g3(%struct.ss* %b)
+ ret i32 4
+}
+
+define i32 @test4() nounwind {
+entry:
+ %S = alloca %struct.ss, align 2 ; <%struct.ss*> [#uses=4]
+ %X = call i32 @f4( %struct.ss* byval align 64 %S ) nounwind
+ ret i32 %X
+; CHECK: @test4()
+; CHECK: %S = alloca %struct.ss, align 64
+; CHECK-NOT: call void @llvm.memcpy
+; CHECK: call void @g3
+; CHECK: ret i32 4
+}
+
+%struct.S0 = type { i32 }
+
+@b = global %struct.S0 { i32 1 }, align 4
+@a = common global i32 0, align 4
+
+define internal void @f5(%struct.S0* byval nocapture readonly align 4 %p) {
+entry:
+ store i32 0, i32* getelementptr inbounds (%struct.S0* @b, i64 0, i32 0), align 4
+ %f2 = getelementptr inbounds %struct.S0* %p, i64 0, i32 0
+ %0 = load i32* %f2, align 4
+ store i32 %0, i32* @a, align 4
+ ret void
+}
+
+define i32 @test5() {
+entry:
+ tail call void @f5(%struct.S0* byval align 4 @b)
+ %0 = load i32* @a, align 4
+ ret i32 %0
+; CHECK: @test5()
+; CHECK: store i32 0, i32* getelementptr inbounds (%struct.S0* @b, i64 0, i32 0), align 4
+; CHECK-NOT: load i32* getelementptr inbounds (%struct.S0* @b, i64 0, i32 0), align 4
}