2013-09-05 05:32:16 +00:00
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;RUN: llc -march=sparc < %s | FileCheck %s
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;RUN: llc -march=sparcv9 < %s | FileCheck %s --check-prefix=V9
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%0 = type { [32 x i32] }
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%struct.jmpbuf_env = type { i32, i32, [1 x %struct.__jmp_buf_tag], i32 }
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%struct.__jmp_buf_tag = type { [3 x i32], i32, %0 }
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@jenv = common unnamed_addr global %struct.jmpbuf_env* null
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Remove the linker_private and linker_private_weak linkages.
These linkages were introduced some time ago, but it was never very
clear what exactly their semantics were or what they should be used
for. Some investigation found these uses:
* utf-16 strings in clang.
* non-unnamed_addr strings produced by the sanitizers.
It turns out they were just working around a more fundamental problem.
For some sections a MachO linker needs a symbol in order to split the
section into atoms, and llvm had no idea that was the case. I fixed
that in r201700 and it is now safe to use the private linkage. When
the object ends up in a section that requires symbols, llvm will use a
'l' prefix instead of a 'L' prefix and things just work.
With that, these linkages were already dead, but there was a potential
future user in the objc metadata information. I am still looking at
CGObjcMac.cpp, but at this point I am convinced that linker_private
and linker_private_weak are not what they need.
The objc uses are currently split in
* Regular symbols (no '\01' prefix). LLVM already directly provides
whatever semantics they need.
* Uses of a private name (start with "\01L" or "\01l") and private
linkage. We can drop the "\01L" and "\01l" prefixes as soon as llvm
agrees with clang on L being ok or not for a given section. I have two
patches in code review for this.
* Uses of private name and weak linkage.
The last case is the one that one could think would fit one of these
linkages. That is not the case. The semantics are
* the linker will merge these symbol by *name*.
* the linker will hide them in the final DSO.
Given that the merging is done by name, any of the private (or
internal) linkages would be a bad match. They allow llvm to rename the
symbols, and that is really not what we want. From the llvm point of
view, these objects should really be (linkonce|weak)(_odr)?.
For now, just keeping the "\01l" prefix is probably the best for these
symbols. If we one day want to have a more direct support in llvm,
IMHO what we should add is not a linkage, it is just a hidden_symbol
attribute. It would be applicable to multiple linkages. For example,
on weak it would produce the current behavior we have for objc
metadata. On internal, it would be equivalent to private (and we
should then remove private).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203866 91177308-0d34-0410-b5e6-96231b3b80d8
2014-03-13 23:18:37 +00:00
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@.cst = private unnamed_addr constant [30 x i8] c"in bar with jmp_buf's id: %d\0A\00", align 64
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2013-09-05 05:32:16 +00:00
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; CHECK-LABEL: foo
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; CHECK-DAG: st {{.+}}, [%i0]
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; CHECK-DAG: st {{.+}}, [%i0+4]
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; CHECK: call _setjmp
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; CHECK: ld [%fp+{{.+}}], %[[R:[gilo][0-7]]]
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; CHECK: st %o0, [%[[R]]+{{.+}}]
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; V9-LABEL: foo
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; V9-DAG: st {{.+}}, [%i0]
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; V9-DAG: st {{.+}}, [%i0+4]
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; V9: call _setjmp
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; V9: ldx [%fp+{{.+}}], %[[R:[gilo][0-7]]]
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; V9: st %o0, [%[[R]]+{{.+}}]
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; Function Attrs: nounwind
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define i32 @foo(%struct.jmpbuf_env* byval %inbuf) #0 {
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entry:
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%0 = getelementptr inbounds %struct.jmpbuf_env* %inbuf, i32 0, i32 0
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2013-09-30 18:17:55 +00:00
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store i32 0, i32* %0, align 4, !tbaa !4
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2013-09-05 05:32:16 +00:00
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%1 = getelementptr inbounds %struct.jmpbuf_env* %inbuf, i32 0, i32 1
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2013-09-30 18:17:55 +00:00
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store i32 1, i32* %1, align 4, !tbaa !4
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2013-09-05 05:32:16 +00:00
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%2 = getelementptr inbounds %struct.jmpbuf_env* %inbuf, i32 0, i32 2, i32 0
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%3 = call i32 @_setjmp(%struct.__jmp_buf_tag* %2) #2
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%4 = getelementptr inbounds %struct.jmpbuf_env* %inbuf, i32 0, i32 3
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2013-09-30 18:17:55 +00:00
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store i32 %3, i32* %4, align 4, !tbaa !4
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store %struct.jmpbuf_env* %inbuf, %struct.jmpbuf_env** @jenv, align 4, !tbaa !3
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%5 = load i32* %1, align 4, !tbaa !4
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2013-09-05 05:32:16 +00:00
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%6 = icmp eq i32 %5, 1
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%7 = icmp eq i32 %3, 0
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%or.cond = and i1 %6, %7
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br i1 %or.cond, label %"4.i", label %bar.exit
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"4.i": ; preds = %entry
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call void @longjmp(%struct.__jmp_buf_tag* %2, i32 0) #1
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unreachable
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bar.exit: ; preds = %entry
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2013-09-30 18:17:55 +00:00
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%8 = load i32* %0, align 4, !tbaa !4
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2013-09-05 05:32:16 +00:00
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%9 = call i32 (i8*, ...)* @printf(i8* noalias getelementptr inbounds ([30 x i8]* @.cst, i32 0, i32 0), i32 %8) #0
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ret i32 0
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}
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; Function Attrs: nounwind returns_twice
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declare i32 @_setjmp(%struct.__jmp_buf_tag*) #2
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; Function Attrs: noreturn nounwind
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declare void @longjmp(%struct.__jmp_buf_tag*, i32) #1
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; Function Attrs: nounwind
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declare i32 @printf(i8* nocapture, ...) #0
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attributes #0 = { nounwind }
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attributes #1 = { noreturn nounwind }
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attributes #2 = { nounwind returns_twice }
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IR: Make metadata typeless in assembly
Now that `Metadata` is typeless, reflect that in the assembly. These
are the matching assembly changes for the metadata/value split in
r223802.
- Only use the `metadata` type when referencing metadata from a call
intrinsic -- i.e., only when it's used as a `Value`.
- Stop pretending that `ValueAsMetadata` is wrapped in an `MDNode`
when referencing it from call intrinsics.
So, assembly like this:
define @foo(i32 %v) {
call void @llvm.foo(metadata !{i32 %v}, metadata !0)
call void @llvm.foo(metadata !{i32 7}, metadata !0)
call void @llvm.foo(metadata !1, metadata !0)
call void @llvm.foo(metadata !3, metadata !0)
call void @llvm.foo(metadata !{metadata !3}, metadata !0)
ret void, !bar !2
}
!0 = metadata !{metadata !2}
!1 = metadata !{i32* @global}
!2 = metadata !{metadata !3}
!3 = metadata !{}
turns into this:
define @foo(i32 %v) {
call void @llvm.foo(metadata i32 %v, metadata !0)
call void @llvm.foo(metadata i32 7, metadata !0)
call void @llvm.foo(metadata i32* @global, metadata !0)
call void @llvm.foo(metadata !3, metadata !0)
call void @llvm.foo(metadata !{!3}, metadata !0)
ret void, !bar !2
}
!0 = !{!2}
!1 = !{i32* @global}
!2 = !{!3}
!3 = !{}
I wrote an upgrade script that handled almost all of the tests in llvm
and many of the tests in cfe (even handling many `CHECK` lines). I've
attached it (or will attach it in a moment if you're speedy) to PR21532
to help everyone update their out-of-tree testcases.
This is part of PR21532.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224257 91177308-0d34-0410-b5e6-96231b3b80d8
2014-12-15 19:07:53 +00:00
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!0 = !{!"alias set 6: struct.jmpbuf_env*", !1}
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!1 = !{!1}
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!2 = !{!"alias set 3: int", !1}
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!3 = !{!0, !0, i64 0}
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!4 = !{!2, !2, i64 0}
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