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45072b933e
Summary: Initially, these intrinsics seemed like part of a family of "frame" related intrinsics, but now I think that's more confusing than helpful. Initially, the LangRef specified that this would create a new kind of allocation that would be allocated at a fixed offset from the frame pointer (EBP/RBP). We ended up dropping that design, and leaving the stack frame layout alone. These intrinsics are really about sharing local stack allocations, not frame pointers. I intend to go further and add an `llvm.localaddress()` intrinsic that returns whatever register (EBP, ESI, ESP, RBX) is being used to address locals, which should not be confused with the frame pointer. Naming suggestions at this point are welcome, I'm happy to re-run sed. Reviewers: majnemer, nicholas Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D11011 llvm-svn: 241633
70 lines
1.9 KiB
LLVM
70 lines
1.9 KiB
LLVM
; RUN: not llvm-as %s -o /dev/null 2>&1 | FileCheck %s
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declare void @llvm.localescape(...)
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declare i8* @llvm.localrecover(i8*, i8*, i32)
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define internal void @f() {
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%a = alloca i8
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call void (...) @llvm.localescape(i8* %a)
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call void (...) @llvm.localescape(i8* %a)
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ret void
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}
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; CHECK: multiple calls to llvm.localescape in one function
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define internal void @g() {
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entry:
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%a = alloca i8
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br label %not_entry
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not_entry:
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call void (...) @llvm.localescape(i8* %a)
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ret void
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}
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; CHECK: llvm.localescape used outside of entry block
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define internal void @h() {
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call i8* @llvm.localrecover(i8* null, i8* null, i32 0)
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ret void
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}
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; CHECK: llvm.localrecover 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.localrecover(i8* @global, i8* null, i32 0)
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ret void
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}
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; CHECK: llvm.localrecover first argument must be function defined in this module
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define internal void @j() {
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call i8* @llvm.localrecover(i8* bitcast(void()* @declaration to i8*), i8* null, i32 0)
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ret void
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}
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; CHECK: llvm.localrecover first argument must be function defined in this module
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define internal void @k(i32 %n) {
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call i8* @llvm.localrecover(i8* bitcast(void()* @f to i8*), i8* null, i32 %n)
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ret void
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}
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; CHECK: idx argument of llvm.localrecover must be a constant int
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define internal void @l(i8* %b) {
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%a = alloca i8
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call void (...) @llvm.localescape(i8* %a, i8* %b)
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ret void
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}
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; CHECK: llvm.localescape only accepts static allocas
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define internal void @m() {
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%a = alloca i8
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call void (...) @llvm.localescape(i8* %a)
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ret void
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}
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define internal void @n(i8* %fp) {
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call i8* @llvm.localrecover(i8* bitcast(void ()* @m to i8*), i8* %fp, i32 1)
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ret void
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}
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; CHECK: all indices passed to llvm.localrecover must be less than the number of arguments passed ot llvm.localescape in the parent function
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