mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-24 13:33:37 +02:00
58149dbd85
Summary: It was previously not possible for tools to use solely the stackmap information emitted to reconstruct the return addresses of callsites in the map, which is necessary to use the information to walk a stack. This patch adds per-function callsite counts when emitting the stackmap section in order to resolve the problem. Note that this slightly alters the stackmap format, so external tools parsing these maps will need to be updated. **Problem Details:** Records only store their offset from the beginning of the function they belong to. While these records and the functions are output in program order, it is not possible to determine where the end of one function's records are without the callsite count when processing the records to compute return addresses. Patch by Kavon Farvardin! Reviewers: atrick, ributzka, sanjoy Subscribers: nemanjai Differential Revision: https://reviews.llvm.org/D23487 llvm-svn: 281532
179 lines
5.4 KiB
LLVM
179 lines
5.4 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=corei7-avx -enable-patchpoint-liveness=false | FileCheck %s
|
|
; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=corei7-avx | FileCheck -check-prefix=PATCH %s
|
|
;
|
|
; Note: Print verbose stackmaps using -debug-only=stackmaps.
|
|
|
|
; CHECK-LABEL: .section __LLVM_STACKMAPS,__llvm_stackmaps
|
|
; CHECK-NEXT: __LLVM_StackMaps:
|
|
; Header
|
|
; CHECK-NEXT: .byte 2
|
|
; CHECK-NEXT: .byte 0
|
|
; CHECK-NEXT: .short 0
|
|
; Num Functions
|
|
; CHECK-NEXT: .long 2
|
|
; Num LargeConstants
|
|
; CHECK-NEXT: .long 0
|
|
; Num Callsites
|
|
; CHECK-NEXT: .long 5
|
|
|
|
; Functions and stack size
|
|
; CHECK-NEXT: .quad _stackmap_liveness
|
|
; CHECK-NEXT: .quad 8
|
|
; CHECK-NEXT: .quad 3
|
|
; CHECK-NEXT: .quad _mixed_liveness
|
|
; CHECK-NEXT: .quad 8
|
|
; CHECK-NEXT: .quad 2
|
|
|
|
define void @stackmap_liveness() {
|
|
entry:
|
|
%a1 = call <2 x double> asm sideeffect "", "={xmm2}"() nounwind
|
|
; StackMap 1 (no liveness information available)
|
|
; CHECK-LABEL: .long L{{.*}}-_stackmap_liveness
|
|
; CHECK-NEXT: .short 0
|
|
; CHECK-NEXT: .short 0
|
|
; Padding
|
|
; CHECK-NEXT: .short 0
|
|
; Num LiveOut Entries: 0
|
|
; CHECK-NEXT: .short 0
|
|
; Align
|
|
; CHECK-NEXT: .p2align 3
|
|
|
|
; StackMap 1 (patchpoint liveness information enabled)
|
|
; PATCH-LABEL: .long L{{.*}}-_stackmap_liveness
|
|
; PATCH-NEXT: .short 0
|
|
; PATCH-NEXT: .short 0
|
|
; Padding
|
|
; PATCH-NEXT: .short 0
|
|
; Num LiveOut Entries: 1
|
|
; PATCH-NEXT: .short 1
|
|
; LiveOut Entry 1: %YMM2 (16 bytes) --> %XMM2
|
|
; PATCH-NEXT: .short 19
|
|
; PATCH-NEXT: .byte 0
|
|
; PATCH-NEXT: .byte 16
|
|
; Align
|
|
; PATCH-NEXT: .p2align 3
|
|
call anyregcc void (i64, i32, i8*, i32, ...) @llvm.experimental.patchpoint.void(i64 1, i32 12, i8* null, i32 0)
|
|
%a2 = call i64 asm sideeffect "", "={r8}"() nounwind
|
|
%a3 = call i8 asm sideeffect "", "={ah}"() nounwind
|
|
%a4 = call <4 x double> asm sideeffect "", "={ymm0}"() nounwind
|
|
%a5 = call <4 x double> asm sideeffect "", "={ymm1}"() nounwind
|
|
|
|
; StackMap 2 (no liveness information available)
|
|
; CHECK-LABEL: .long L{{.*}}-_stackmap_liveness
|
|
; CHECK-NEXT: .short 0
|
|
; CHECK-NEXT: .short 0
|
|
; Padding
|
|
; CHECK-NEXT: .short 0
|
|
; Num LiveOut Entries: 0
|
|
; CHECK-NEXT: .short 0
|
|
; Align
|
|
; CHECK-NEXT: .p2align 3
|
|
|
|
; StackMap 2 (patchpoint liveness information enabled)
|
|
; PATCH-LABEL: .long L{{.*}}-_stackmap_liveness
|
|
; PATCH-NEXT: .short 0
|
|
; PATCH-NEXT: .short 0
|
|
; Padding
|
|
; PATCH-NEXT: .short 0
|
|
; Num LiveOut Entries: 5
|
|
; PATCH-NEXT: .short 5
|
|
; LiveOut Entry 1: %RAX (1 bytes) --> %AL or %AH
|
|
; PATCH-NEXT: .short 0
|
|
; PATCH-NEXT: .byte 0
|
|
; PATCH-NEXT: .byte 1
|
|
; LiveOut Entry 2: %R8 (8 bytes)
|
|
; PATCH-NEXT: .short 8
|
|
; PATCH-NEXT: .byte 0
|
|
; PATCH-NEXT: .byte 8
|
|
; LiveOut Entry 3: %YMM0 (32 bytes)
|
|
; PATCH-NEXT: .short 17
|
|
; PATCH-NEXT: .byte 0
|
|
; PATCH-NEXT: .byte 32
|
|
; LiveOut Entry 4: %YMM1 (32 bytes)
|
|
; PATCH-NEXT: .short 18
|
|
; PATCH-NEXT: .byte 0
|
|
; PATCH-NEXT: .byte 32
|
|
; LiveOut Entry 5: %YMM2 (16 bytes) --> %XMM2
|
|
; PATCH-NEXT: .short 19
|
|
; PATCH-NEXT: .byte 0
|
|
; PATCH-NEXT: .byte 16
|
|
; Align
|
|
; PATCH-NEXT: .p2align 3
|
|
call anyregcc void (i64, i32, i8*, i32, ...) @llvm.experimental.patchpoint.void(i64 2, i32 12, i8* null, i32 0)
|
|
call void asm sideeffect "", "{r8},{ah},{ymm0},{ymm1}"(i64 %a2, i8 %a3, <4 x double> %a4, <4 x double> %a5) nounwind
|
|
|
|
; StackMap 3 (no liveness information available)
|
|
; CHECK-LABEL: .long L{{.*}}-_stackmap_liveness
|
|
; CHECK-NEXT: .short 0
|
|
; CHECK-NEXT: .short 0
|
|
; Padding
|
|
; CHECK-NEXT: .short 0
|
|
; Num LiveOut Entries: 0
|
|
; CHECK-NEXT: .short 0
|
|
; Align
|
|
; CHECK-NEXT: .p2align 3
|
|
|
|
; StackMap 3 (patchpoint liveness information enabled)
|
|
; PATCH-LABEL: .long L{{.*}}-_stackmap_liveness
|
|
; PATCH-NEXT: .short 0
|
|
; PATCH-NEXT: .short 0
|
|
; Padding
|
|
; PATCH-NEXT: .short 0
|
|
; Num LiveOut Entries: 2
|
|
; PATCH-NEXT: .short 2
|
|
; LiveOut Entry 1: %RSP (8 bytes)
|
|
; PATCH-NEXT: .short 7
|
|
; PATCH-NEXT: .byte 0
|
|
; PATCH-NEXT: .byte 8
|
|
; LiveOut Entry 2: %YMM2 (16 bytes) --> %XMM2
|
|
; PATCH-NEXT: .short 19
|
|
; PATCH-NEXT: .byte 0
|
|
; PATCH-NEXT: .byte 16
|
|
; Align
|
|
; PATCH-NEXT: .p2align 3
|
|
call anyregcc void (i64, i32, i8*, i32, ...) @llvm.experimental.patchpoint.void(i64 3, i32 12, i8* null, i32 0)
|
|
call void asm sideeffect "", "{xmm2}"(<2 x double> %a1) nounwind
|
|
ret void
|
|
}
|
|
|
|
define void @mixed_liveness() {
|
|
entry:
|
|
%a1 = call <2 x double> asm sideeffect "", "={xmm2}"() nounwind
|
|
; StackMap 4 (patchpoint liveness information enabled)
|
|
; PATCH-LABEL: .long L{{.*}}-_mixed_liveness
|
|
; PATCH-NEXT: .short 0
|
|
; PATCH-NEXT: .short 0
|
|
; Padding
|
|
; PATCH-NEXT: .short 0
|
|
; Num LiveOut Entries: 0
|
|
; PATCH-NEXT: .short 0
|
|
; Align
|
|
; PATCH-NEXT: .p2align 3
|
|
|
|
; StackMap 5 (patchpoint liveness information enabled)
|
|
; PATCH-LABEL: .long L{{.*}}-_mixed_liveness
|
|
; PATCH-NEXT: .short 0
|
|
; PATCH-NEXT: .short 0
|
|
; Padding
|
|
; PATCH-NEXT: .short 0
|
|
; Num LiveOut Entries: 2
|
|
; PATCH-NEXT: .short 2
|
|
; LiveOut Entry 1: %RSP (8 bytes)
|
|
; PATCH-NEXT: .short 7
|
|
; PATCH-NEXT: .byte 0
|
|
; PATCH-NEXT: .byte 8
|
|
; LiveOut Entry 2: %YMM2 (16 bytes) --> %XMM2
|
|
; PATCH-NEXT: .short 19
|
|
; PATCH-NEXT: .byte 0
|
|
; PATCH-NEXT: .byte 16
|
|
; Align
|
|
; PATCH-NEXT: .p2align 3
|
|
call void (i64, i32, ...) @llvm.experimental.stackmap(i64 4, i32 5)
|
|
call anyregcc void (i64, i32, i8*, i32, ...) @llvm.experimental.patchpoint.void(i64 5, i32 0, i8* null, i32 0)
|
|
call void asm sideeffect "", "{xmm2}"(<2 x double> %a1) nounwind
|
|
ret void
|
|
}
|
|
|
|
declare void @llvm.experimental.stackmap(i64, i32, ...)
|
|
declare void @llvm.experimental.patchpoint.void(i64, i32, i8*, i32, ...)
|