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These intrinsics allow multiple functions to share a single stack allocation from one function's call frame. The function with the allocation may only perform one allocation, and it must be in the entry block. Functions accessing the allocation call llvm.recoverframeallocation with the function whose frame they are accessing and a frame pointer from an active call frame of that function. These intrinsics are very difficult to inline correctly, so the intention is that they be introduced rarely, or at least very late during EH preparation. Reviewers: echristo, andrew.w.kaylor Differential Revision: http://reviews.llvm.org/D6493 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225746 91177308-0d34-0410-b5e6-96231b3b80d8
49 lines
1.3 KiB
LLVM
49 lines
1.3 KiB
LLVM
; RUN: not llvm-as %s -o /dev/null 2>&1 | FileCheck %s
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declare i8* @llvm.frameallocate(i32)
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declare i8* @llvm.recoverframeallocation(i8*, i8*)
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define internal void @f() {
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call i8* @llvm.frameallocate(i32 4)
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call i8* @llvm.frameallocate(i32 4)
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ret void
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}
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; CHECK: multiple calls to llvm.frameallocate in one function
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define internal void @f_a(i32 %n) {
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call i8* @llvm.frameallocate(i32 %n)
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ret void
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}
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; CHECK: llvm.frameallocate argument must be constant integer size
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define internal void @g() {
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entry:
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br label %not_entry
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not_entry:
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call i8* @llvm.frameallocate(i32 4)
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ret void
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}
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; CHECK: llvm.frameallocate used outside of entry block
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define internal void @h() {
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call i8* @llvm.recoverframeallocation(i8* null, i8* null)
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ret void
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}
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; CHECK: llvm.recoverframeallocation first argument must be function defined in this module
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@global = constant i8 0
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declare void @declaration()
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define internal void @i() {
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call i8* @llvm.recoverframeallocation(i8* @global, i8* null)
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ret void
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}
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; CHECK: llvm.recoverframeallocation first argument must be function defined in this module
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define internal void @j() {
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call i8* @llvm.recoverframeallocation(i8* bitcast(void()* @declaration to i8*), i8* null)
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ret void
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}
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; CHECK: llvm.recoverframeallocation first argument must be function defined in this module
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