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llvm-project/llvm/test/Transforms/CodeGenPrepare/invariant.group.ll

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Introducing llvm.invariant.group.barrier intrinsic For more info for what reason it was invented, goto: http://lists.llvm.org/pipermail/cfe-dev/2015-July/044227.html invariant.group.barrier: http://reviews.llvm.org/D12310 docs: http://reviews.llvm.org/D11399 CodeGenPrepare: http://reviews.llvm.org/D12875 llvm-svn: 247711
2015-09-16 02:32:14 +08:00
; RUN: opt -codegenprepare -S < %s | FileCheck %s
@tmp = global i8 0
; CHECK-LABEL: define void @foo() {
define void @foo() {
enter:
; CHECK-NOT: !invariant.group
Rename invariant.group.barrier to launder.invariant.group Summary: This is one of the initial commit of "RFC: Devirtualization v2" proposal: https://docs.google.com/document/d/16GVtCpzK8sIHNc2qZz6RN8amICNBtvjWUod2SujZVEo/edit?usp=sharing Reviewers: rsmith, amharc, kuhar, sanjoy Subscribers: arsenm, nhaehnle, javed.absar, hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D45111 llvm-svn: 331448
2018-05-03 19:03:01 +08:00
; CHECK-NOT: @llvm.launder.invariant.group.p0i8(
Fix CodeGenPrepare::stripInvariantGroupMetadata `dropUnknownNonDebugMetadata` takes a list of "known" metadata IDs. The only reason it worked at all is that `getMetadataID` returns something unrelated -- it returns the subclass ID of the receiver (which is used in `dyn_cast` etc.). That does not numerically match `LLVMContext::MD_invariant_group` and ends up dropping `invariant_group` along with every other metadata that does not numerically match `LLVMContext::MD_invariant_group`. llvm-svn: 289973
2016-12-17 02:52:33 +08:00
; CHECK: %val = load i8, i8* @tmp, !tbaa
%val = load i8, i8* @tmp, !invariant.group !0, !tbaa !{!1, !1, i64 0}
Rename invariant.group.barrier to launder.invariant.group Summary: This is one of the initial commit of "RFC: Devirtualization v2" proposal: https://docs.google.com/document/d/16GVtCpzK8sIHNc2qZz6RN8amICNBtvjWUod2SujZVEo/edit?usp=sharing Reviewers: rsmith, amharc, kuhar, sanjoy Subscribers: arsenm, nhaehnle, javed.absar, hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D45111 llvm-svn: 331448
2018-05-03 19:03:01 +08:00
%ptr = call i8* @llvm.launder.invariant.group.p0i8(i8* @tmp)
Introducing llvm.invariant.group.barrier intrinsic For more info for what reason it was invented, goto: http://lists.llvm.org/pipermail/cfe-dev/2015-July/044227.html invariant.group.barrier: http://reviews.llvm.org/D12310 docs: http://reviews.llvm.org/D11399 CodeGenPrepare: http://reviews.llvm.org/D12875 llvm-svn: 247711
2015-09-16 02:32:14 +08:00
; CHECK: store i8 42, i8* @tmp
store i8 42, i8* %ptr, !invariant.group !0
ret void
}
; CHECK-LABEL: }
Rename invariant.group.barrier to launder.invariant.group Summary: This is one of the initial commit of "RFC: Devirtualization v2" proposal: https://docs.google.com/document/d/16GVtCpzK8sIHNc2qZz6RN8amICNBtvjWUod2SujZVEo/edit?usp=sharing Reviewers: rsmith, amharc, kuhar, sanjoy Subscribers: arsenm, nhaehnle, javed.absar, hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D45111 llvm-svn: 331448
2018-05-03 19:03:01 +08:00
declare i8* @llvm.launder.invariant.group.p0i8(i8*)
Introducing llvm.invariant.group.barrier intrinsic For more info for what reason it was invented, goto: http://lists.llvm.org/pipermail/cfe-dev/2015-July/044227.html invariant.group.barrier: http://reviews.llvm.org/D12310 docs: http://reviews.llvm.org/D11399 CodeGenPrepare: http://reviews.llvm.org/D12875 llvm-svn: 247711
2015-09-16 02:32:14 +08:00
Fix CodeGenPrepare::stripInvariantGroupMetadata `dropUnknownNonDebugMetadata` takes a list of "known" metadata IDs. The only reason it worked at all is that `getMetadataID` returns something unrelated -- it returns the subclass ID of the receiver (which is used in `dyn_cast` etc.). That does not numerically match `LLVMContext::MD_invariant_group` and ends up dropping `invariant_group` along with every other metadata that does not numerically match `LLVMContext::MD_invariant_group`. llvm-svn: 289973
2016-12-17 02:52:33 +08:00
!0 = !{!"something"}
!1 = !{!"x", !0}