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f6eeeaf04e
This broke Chromium's PGO build, it seems because hot-cold-splitting got turned on unintentionally. See comment on the code review for repro etc. > This patch adds -f[no-]split-cold-code CC1 options to clang. This allows > the splitting pass to be toggled on/off. The current method of passing > `-mllvm -hot-cold-split=true` to clang isn't ideal as it may not compose > correctly (say, with `-O0` or `-Oz`). > > To implement the -fsplit-cold-code option, an attribute is applied to > functions to indicate that they may be considered for splitting. This > removes some complexity from the old/new PM pipeline builders, and > behaves as expected when LTO is enabled. > > Co-authored by: Saleem Abdulrasool <compnerd@compnerd.org> > Differential Revision: https://reviews.llvm.org/D57265 > Reviewed By: Aditya Kumar, Vedant Kumar > Reviewers: Teresa Johnson, Aditya Kumar, Fedor Sergeev, Philip Pfaffe, Vedant Kumar This reverts commit 273c299d5d649a0222fbde03c9a41e41913751b4.
44 lines
1.0 KiB
LLVM
44 lines
1.0 KiB
LLVM
; RUN: opt -hotcoldsplit -hotcoldsplit-threshold=0 -S < %s | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.14.0"
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%swift_error = type {i64, i8}
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declare void @sink() cold
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; CHECK-LABEL: define {{.*}}@in_arg(
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; CHECK: call void @in_arg.cold.1(%swift_error** swifterror
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define void @in_arg(%swift_error** swifterror %error_ptr_ref) {
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br i1 undef, label %cold, label %exit
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cold:
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store %swift_error* undef, %swift_error** %error_ptr_ref
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call void @sink()
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br label %exit
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exit:
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ret void
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}
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; CHECK-LABEL: define {{.*}}@in_alloca(
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; CHECK: call void @in_alloca.cold.1(%swift_error** swifterror
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define void @in_alloca() {
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%err = alloca swifterror %swift_error*
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br i1 undef, label %cold, label %exit
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cold:
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store %swift_error* undef, %swift_error** %err
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call void @sink()
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br label %exit
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exit:
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ret void
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}
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; CHECK-LABEL: define {{.*}}@in_arg.cold.1({{.*}} swifterror
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; CHECK: call {{.*}}@sink
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; CHECK-LABEL: define {{.*}}@in_alloca.cold.1({{.*}} swifterror
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; CHECK: call {{.*}}@sink
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