llvm/test/Transforms/Inline/guard-intrinsic.ll
Sanjoy Das de765686f8 Introduce a @llvm.experimental.guard intrinsic
Summary:
As discussed on llvm-dev[1].

This change adds the basic boilerplate code around having this intrinsic
in LLVM:

 - Changes in Intrinsics.td, and the IR Verifier
 - A lowering pass to lower @llvm.experimental.guard to normal
   control flow
 - Inliner support

[1]: http://lists.llvm.org/pipermail/llvm-dev/2016-February/095523.html

Reviewers: reames, atrick, chandlerc, rnk, JosephTremoulet, echristo

Subscribers: mcrosier, llvm-commits

Differential Revision: http://reviews.llvm.org/D18527

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@264976 91177308-0d34-0410-b5e6-96231b3b80d8
2016-03-31 00:18:46 +00:00

40 lines
1.1 KiB
LLVM

; RUN: opt -S -always-inline < %s | FileCheck %s
declare void @llvm.experimental.guard(i1, ...)
define i8 @callee(i1* %c_ptr) alwaysinline {
%c = load volatile i1, i1* %c_ptr
call void(i1, ...) @llvm.experimental.guard(i1 %c, i32 1) [ "deopt"(i32 1) ]
ret i8 5
}
define void @caller_0(i1* %c, i8* %ptr) {
; CHECK-LABEL: @caller_0(
entry:
; CHECK: [[COND:%[^ ]+]] = load volatile i1, i1* %c
; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[COND]], i32 1) [ "deopt"(i32 2, i32 1) ]
; CHECK-NEXT: store i8 5, i8* %ptr
%v = call i8 @callee(i1* %c) [ "deopt"(i32 2) ]
store i8 %v, i8* %ptr
ret void
}
define i32 @caller_1(i1* %c, i8* %ptr) personality i8 3 {
; CHECK-LABEL: @caller_1(
; CHECK: [[COND:%[^ ]+]] = load volatile i1, i1* %c
; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[COND]], i32 1) [ "deopt"(i32 3, i32 1) ]
; CHECK-NEXT: br label %normal
entry:
%v = invoke i8 @callee(i1* %c) [ "deopt"(i32 3) ] to label %normal
unwind label %unwind
unwind:
%lp = landingpad i32 cleanup
ret i32 43
normal:
store i8 %v, i8* %ptr
ret i32 42
}