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[XRay] ARM 32-bit no-Thumb support in LLVM This is a port of XRay to ARM 32-bit, without Thumb support yet. The XRay instrumentation support is moving up to AsmPrinter. This is one of 3 commits to different repositories of XRay ARM port. The other 2 are: https://reviews.llvm.org/D23932 (Clang test) https://reviews.llvm.org/D23933 (compiler-rt) Differential Revision: https://reviews.llvm.org/D23931 llvm-svn: 281878
2016-09-19 08:54:35 +08:00
; RUN: llc -filetype=asm -o - -mtriple=armv6-unknown-linux-gnu < %s | FileCheck %s
[xray] Add XRay support for Mach-O in CodeGen Currently, XRay only supports emitting the XRay table (xray_instr_map) on ELF binaries. Let's add Mach-O support. Differential Revision: https://reviews.llvm.org/D26983 llvm-svn: 287734
2016-11-23 10:07:04 +08:00
; RUN: llc -filetype=asm -o - -mtriple=armv6-apple-ios6.0.0 < %s | FileCheck %s
[XRay] ARM 32-bit no-Thumb support in LLVM This is a port of XRay to ARM 32-bit, without Thumb support yet. The XRay instrumentation support is moving up to AsmPrinter. This is one of 3 commits to different repositories of XRay ARM port. The other 2 are: https://reviews.llvm.org/D23932 (Clang test) https://reviews.llvm.org/D23933 (compiler-rt) Differential Revision: https://reviews.llvm.org/D23931 llvm-svn: 281878
2016-09-19 08:54:35 +08:00
define i32 @foo() nounwind noinline uwtable "function-instrument"="xray-always" {
; CHECK-LABEL: Lxray_sled_0:
; CHECK-NEXT: b #20
; CHECK-NEXT: mov r0, r0
; CHECK-NEXT: mov r0, r0
; CHECK-NEXT: mov r0, r0
; CHECK-NEXT: mov r0, r0
; CHECK-NEXT: mov r0, r0
; CHECK-NEXT: mov r0, r0
; CHECK-LABEL: Ltmp0:
ret i32 0
; CHECK-LABEL: Lxray_sled_1:
; CHECK-NEXT: b #20
; CHECK-NEXT: mov r0, r0
; CHECK-NEXT: mov r0, r0
; CHECK-NEXT: mov r0, r0
; CHECK-NEXT: mov r0, r0
; CHECK-NEXT: mov r0, r0
; CHECK-NEXT: mov r0, r0
; CHECK-LABEL: Ltmp1:
; CHECK-NEXT: bx lr
}
[XRay][CodeGen] Use PIC-friendly code in XRay sleds and remove synthetic references in .text Summary: This is a re-roll of D36615 which uses PLT relocations in the back-end to the call to __xray_CustomEvent() when building in -fPIC and -fxray-instrument mode. Reviewers: pcc, djasper, bkramer Subscribers: sdardis, javed.absar, llvm-commits Differential Revision: https://reviews.llvm.org/D37373 llvm-svn: 312466
2017-09-04 13:34:58 +08:00
; CHECK-LABEL: xray_instr_map
[XRay] Reduce synthetic references emitted by XRay Summary: When we're building with XRay instrumentation, we use a trick that preserves references from the function to a function sled index. This index table lives in a separate section, and without this trick the linker is free to garbage-collect this section and all the segments it refers to. Until we're able to tell the linkers to preserve these sections, we use this reference trick to keep around both the index and the entries in the instrumentation map. Before this change we emitted both a synthetic reference to the label in the instrumentation map, and to the entry in the function map index. This change removes the first synthetic reference and only emits one synthetic reference to the index -- the index entry has the references to the labels in the instrumentation map, so the linker will still preserve those if the function itself is preserved. This reduces the amount of synthetic references we emit from 16 bytes to just 8 bytes in x86_64, and similarly to other platforms. Reviewers: dblaikie Subscribers: javed.absar, kpw, pelikan, llvm-commits Differential Revision: https://reviews.llvm.org/D34340 llvm-svn: 305880
2017-06-21 14:39:42 +08:00
; CHECK-LABEL: Lxray_sleds_start0:
[XRay][Arm] Repair XRay table emission on Arm32 and add tests to identify such problem earlier Summary: Emission of XRay table was occasionally disabled for Arm32, but this bug was not then detected because earlier (also by mistake) testing of XRay was occasionally disabled on 32-bit Arm targets. This patch should fix that problem and detect such problems in the future. This patch is one of a series, see also - https://reviews.llvm.org/D28623 Reviewers: rengolin, dberris Reviewed By: dberris Subscribers: llvm-commits, aemerson, rengolin, dberris, iid_iunknown Differential Revision: https://reviews.llvm.org/D28624 llvm-svn: 292516
2017-01-20 04:24:23 +08:00
; CHECK: .long {{.*}}Lxray_sled_0
; CHECK: .long {{.*}}Lxray_sled_1
[XRay] Reduce synthetic references emitted by XRay Summary: When we're building with XRay instrumentation, we use a trick that preserves references from the function to a function sled index. This index table lives in a separate section, and without this trick the linker is free to garbage-collect this section and all the segments it refers to. Until we're able to tell the linkers to preserve these sections, we use this reference trick to keep around both the index and the entries in the instrumentation map. Before this change we emitted both a synthetic reference to the label in the instrumentation map, and to the entry in the function map index. This change removes the first synthetic reference and only emits one synthetic reference to the index -- the index entry has the references to the labels in the instrumentation map, so the linker will still preserve those if the function itself is preserved. This reduces the amount of synthetic references we emit from 16 bytes to just 8 bytes in x86_64, and similarly to other platforms. Reviewers: dblaikie Subscribers: javed.absar, kpw, pelikan, llvm-commits Differential Revision: https://reviews.llvm.org/D34340 llvm-svn: 305880
2017-06-21 14:39:42 +08:00
; CHECK-LABEL: Lxray_sleds_end0:
[XRay][CodeGen] Use PIC-friendly code in XRay sleds and remove synthetic references in .text Summary: This is a re-roll of D36615 which uses PLT relocations in the back-end to the call to __xray_CustomEvent() when building in -fPIC and -fxray-instrument mode. Reviewers: pcc, djasper, bkramer Subscribers: sdardis, javed.absar, llvm-commits Differential Revision: https://reviews.llvm.org/D37373 llvm-svn: 312466
2017-09-04 13:34:58 +08:00
; CHECK-LABEL: xray_fn_idx
[XRay] Reduce synthetic references emitted by XRay Summary: When we're building with XRay instrumentation, we use a trick that preserves references from the function to a function sled index. This index table lives in a separate section, and without this trick the linker is free to garbage-collect this section and all the segments it refers to. Until we're able to tell the linkers to preserve these sections, we use this reference trick to keep around both the index and the entries in the instrumentation map. Before this change we emitted both a synthetic reference to the label in the instrumentation map, and to the entry in the function map index. This change removes the first synthetic reference and only emits one synthetic reference to the index -- the index entry has the references to the labels in the instrumentation map, so the linker will still preserve those if the function itself is preserved. This reduces the amount of synthetic references we emit from 16 bytes to just 8 bytes in x86_64, and similarly to other platforms. Reviewers: dblaikie Subscribers: javed.absar, kpw, pelikan, llvm-commits Differential Revision: https://reviews.llvm.org/D34340 llvm-svn: 305880
2017-06-21 14:39:42 +08:00
; CHECK: .long {{.*}}Lxray_sleds_start0
; CHECK-NEXT: .long {{.*}}Lxray_sleds_end0