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Summary: Functions with the "xray-log-args" attribute will have a special XRay sled kind emitted, for compiler-rt to copy any call arguments to your logging handler. For practical and performance reasons, only the first argument is supported, and only up to 64 bits. Reviewers: dberris Reviewed By: dberris Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D29702 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@296998 91177308-0d34-0410-b5e6-96231b3b80d8
36 lines
1.1 KiB
LLVM
36 lines
1.1 KiB
LLVM
; When logging arguments is specified, emit the entry sled accordingly.
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; RUN: llc -filetype=asm -o - -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s
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; RUN: llc -filetype=asm -o - -mtriple=x86_64-darwin-unknown < %s | FileCheck %s
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define i32 @callee(i32 %arg) nounwind noinline uwtable "function-instrument"="xray-always" "xray-log-args"="1" {
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ret i32 %arg
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}
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; CHECK-LABEL: Lxray_synthetic_0:
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; CHECK: .quad {{\.?}}Lxray_sled_0
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; CHECK: .quad {{_?}}callee
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; CHECK: .byte 3
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; CHECK: .byte 1
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; CHECK: .{{(zero|space)}} 14
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; CHECK: .quad {{\.?}}Lxray_sled_1
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; CHECK: .quad {{_?}}callee
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; CHECK: .byte 1
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; CHECK: .byte 1
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; CHECK: .{{(zero|space)}} 14
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define i32 @caller(i32 %arg) nounwind noinline uwtable "function-instrument"="xray-always" "xray-log-args"="1" {
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%retval = tail call i32 @callee(i32 %arg)
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ret i32 %retval
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}
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; CHECK-LABEL: Lxray_synthetic_1:
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; CHECK: .quad {{\.?}}Lxray_sled_2
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; CHECK: .quad {{_?}}caller
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; CHECK: .byte 3
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; CHECK: .byte 1
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; CHECK: .{{(zero|space)}} 14
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; CHECK: .quad {{\.?}}Lxray_sled_3
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; CHECK: .quad {{_?}}caller
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; CHECK: .byte 2
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; CHECK: .byte 1
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; CHECK: .{{(zero|space)}} 14
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