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llvm-project/llvm/test/CodeGen/X86/fentry-insertion.ll

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[X86] Implement -mfentry Summary: Insert calls to __fentry__ at function entry. Reviewers: hfinkel, craig.topper Subscribers: mgorny, llvm-commits Differential Revision: https://reviews.llvm.org/D28000 llvm-svn: 293648
2017-02-01 01:00:27 +08:00
; RUN: llc %s -o - | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
define void @test1() #0 {
entry:
ret void
; CHECK-LABEL: @test1
; CHECK: callq __fentry__
; CHECK-NOT: mcount
; CHECK: retq
}
[X86] Fix a crash in FEntryInserter Pass. Summary: FEntryInserter pass unconditionally derefs the first Instruction in the first Basic Block. The pass crashes when the first BasicBlock is empty. Fix the crash by not dereferencing the basic Block iterator. This fixes an issue observed when building Linux kernel 4.4 with clang. Fixes PR33971. Reviewers: hfinkel, niravd, dblaikie Reviewed By: niravd Subscribers: davide, llvm-commits Differential Revision: https://reviews.llvm.org/D35979 llvm-svn: 309694
2017-08-01 23:39:12 +08:00
define void @test2() #1 {
entry:
br label %bb1
bb1:
call void @address_taken(i64 ptrtoint (i8* blockaddress(@test2, %bb1) to i64), i32 512)
ret void
[X86] Implement -mfentry Summary: Insert calls to __fentry__ at function entry. Reviewers: hfinkel, craig.topper Subscribers: mgorny, llvm-commits Differential Revision: https://reviews.llvm.org/D28000 llvm-svn: 293648
2017-02-01 01:00:27 +08:00
[X86] Fix a crash in FEntryInserter Pass. Summary: FEntryInserter pass unconditionally derefs the first Instruction in the first Basic Block. The pass crashes when the first BasicBlock is empty. Fix the crash by not dereferencing the basic Block iterator. This fixes an issue observed when building Linux kernel 4.4 with clang. Fixes PR33971. Reviewers: hfinkel, niravd, dblaikie Reviewed By: niravd Subscribers: davide, llvm-commits Differential Revision: https://reviews.llvm.org/D35979 llvm-svn: 309694
2017-08-01 23:39:12 +08:00
; CHECK-LABEL: @test2
; CHECK: callq __fentry__
; CHECK-NOT: mcount
; CHECK: retq
}
declare void @address_taken(i64, i32) local_unnamed_addr
attributes #0 = { "fentry-call"="true" }
attributes #1 = { inlinehint minsize noredzone nounwind optsize sspstrong "fentry-call"="true" }