From c93adca35856d0eaae088e52ba30cfefbd7ad910 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Fri, 11 Jan 2008 06:09:30 +0000 Subject: When inlining a functino with a byval argument, make an explicit copy of it in case the callee modifies the struct. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45853 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/Transforms/Inline/byval.ll | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 test/Transforms/Inline/byval.ll (limited to 'test/Transforms') diff --git a/test/Transforms/Inline/byval.ll b/test/Transforms/Inline/byval.ll new file mode 100644 index 0000000000..ea8c357603 --- /dev/null +++ b/test/Transforms/Inline/byval.ll @@ -0,0 +1,28 @@ +; RUN: llvm-as < %s | opt -inline | llvm-dis | grep {llvm.memcpy} + +; Inlining a byval struct should cause an explicit copy into an alloca. + + %struct.ss = type { i32, i64 } +@.str = internal constant [10 x i8] c"%d, %lld\0A\00" ; <[10 x i8]*> [#uses=1] + +define internal void @f(%struct.ss* byval %b) nounwind { +entry: + %tmp = getelementptr %struct.ss* %b, i32 0, i32 0 ; [#uses=2] + %tmp1 = load i32* %tmp, align 4 ; [#uses=1] + %tmp2 = add i32 %tmp1, 1 ; [#uses=1] + store i32 %tmp2, i32* %tmp, align 4 + ret void +} + +declare i32 @printf(i8*, ...) nounwind + +define i32 @main() nounwind { +entry: + %S = alloca %struct.ss ; <%struct.ss*> [#uses=4] + %tmp1 = getelementptr %struct.ss* %S, i32 0, i32 0 ; [#uses=1] + store i32 1, i32* %tmp1, align 8 + %tmp4 = getelementptr %struct.ss* %S, i32 0, i32 1 ; [#uses=1] + store i64 2, i64* %tmp4, align 4 + call void @f( %struct.ss* byval %S ) nounwind + ret i32 0 +} -- cgit v1.2.3-70-g09d2