void added a comment.
; ModuleID = 'arch_static_branch.bc'
source_filename = "arch/x86/entry/vsyscall/vsyscall_64.c"
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-grtev4-linux-gnu"
%struct.atomic_t = type { i32 }
%struct.jump_entry = type { i64, i64, i64 }
%struct.tracepoint_func = type { i8*, i8*, i32 }
%struct.static_key = type { %struct.atomic_t, %union.anon }
%union.anon = type { i64 }
@__tracepoint_emulate_vsyscall = external hidden global { i8*, {
%struct.atomic_t, { %struct.jump_entry* } }, i32 ()*, void ()*,
%struct.tracepoint_func* }, section "__tracepoints", align 8
; Function Attrs: alwaysinline noredzone nounwind sspstrong
define zeroext i1 @arch_static_branch(%struct.static_key* nocapture readnone
%key, i1 zeroext %branch) {
entry:
callbr void asm sideeffect "1:.byte 0x0f,0x1f,0x44,0x00,0\0A\09.pushsection
__jump_table, \22aw\22 \0A\09 .balign 8 \0A\09 .quad 1b, ${2:l}, ${0:c} +
${1:c} \0A\09.popsection \0A\09",
"i,i,X,~{dirflag},~{fpsr},~{flags}"(%struct.static_key* bitcast (i32*
getelementptr inbounds ({ i8*, { %struct.atomic_t, { %struct.jump_entry* } },
i32 ()*, void ()*, %struct.tracepoint_func* }, { i8*, { %struct.atomic_t, {
%struct.j
ump_entry* } }, i32 ()*, void ()*, %struct.tracepoint_func* }*
@__tracepoint_emulate_vsyscall, i64 0, i32 1, i32 0, i32 0) to
%struct.static_key*), i1 false, i8* blockaddress(@arch_static_branch, %return))
to label %asm.fallthrough [label %return]
asm.fallthrough: ; preds = %entry
call void asm sideeffect "", "~{dirflag},~{fpsr},~{flags}"()
br label %return
return: ; preds = %asm.fallthrough,
%entry
%retval.0 = phi i1 [ false, %asm.fallthrough ], [ true, %entry ]
ret i1 %retval.0
}
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D56571/new/
https://reviews.llvm.org/D56571
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