maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/llvm/test/Instrumentation/DataFlowSanitizer/origin_phi.ll

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

44 lines
2.0 KiB
LLVM
Raw Normal View History

[dfsan] Add full fast8 support Complete support for fast8: - amend shadow size and mapping in runtime - remove fast16 mode and -dfsan-fast-16-labels flag - remove legacy mode and make fast8 mode the default - remove dfsan-fast-8-labels flag - remove functions in dfsan interface only applicable to legacy - remove legacy-related instrumentation code and tests - update documentation. Reviewed By: stephan.yichao.zhao, browneee Differential Revision: https://reviews.llvm.org/D103745
2021-06-05 06:34:02 +08:00
; RUN: opt < %s -dfsan -dfsan-track-origins=1 -S | FileCheck %s
[dfsan] Tracking origins at phi nodes This is a part of https://reviews.llvm.org/D95835. Reviewed-by: morehouse Differential Revision: https://reviews.llvm.org/D98268
2021-03-09 12:13:16 +08:00
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
; CHECK: @__dfsan_arg_tls = external thread_local(initialexec) global [[TLS_ARR:\[100 x i64\]]]
; CHECK: @__dfsan_shadow_width_bits = weak_odr constant i32 [[#SBITS:]]
; CHECK: @__dfsan_shadow_width_bytes = weak_odr constant i32 [[#SBYTES:]]
define i32 @phiop(i32 %a, i32 %b, i1 %c) {
[dfsan] Replace dfs$ prefix with .dfsan suffix The current naming scheme adds the `dfs$` prefix to all DFSan-instrumented functions. This breaks mangling and prevents stack trace printers and other tools from automatically demangling function names. This new naming scheme is mangling-compatible, with the `.dfsan` suffix being a vendor-specific suffix: https://itanium-cxx-abi.github.io/cxx-abi/abi.html#mangling-structure With this fix, demangling utils would work out-of-the-box. Reviewed By: stephan.yichao.zhao Differential Revision: https://reviews.llvm.org/D104494
2021-06-18 05:55:05 +08:00
; CHECK: @phiop.dfsan
[dfsan] Tracking origins at phi nodes This is a part of https://reviews.llvm.org/D95835. Reviewed-by: morehouse Differential Revision: https://reviews.llvm.org/D98268
2021-03-09 12:13:16 +08:00
; CHECK: entry:
; CHECK: [[BO:%.*]] = load i32, i32* getelementptr inbounds ([200 x i32], [200 x i32]* @__dfsan_arg_origin_tls, i64 0, i64 1), align 4
; CHECK: [[AO:%.*]] = load i32, i32* getelementptr inbounds ([200 x i32], [200 x i32]* @__dfsan_arg_origin_tls, i64 0, i64 0), align 4
[dfsan] Enable origin tracking with fast8 mode All related instrumentation tests have been updated. Reviewed By: stephan.yichao.zhao Differential Revision: https://reviews.llvm.org/D100903
2021-04-21 06:31:58 +08:00
; CHECK: [[BS:%.*]] = load i[[#SBITS]], i[[#SBITS]]* inttoptr (i64 add (i64 ptrtoint ([[TLS_ARR]]* @__dfsan_arg_tls to i64), i64 2) to i[[#SBITS]]*), align [[ALIGN:2]]
; CHECK: [[AS:%.*]] = load i[[#SBITS]], i[[#SBITS]]* bitcast ([[TLS_ARR]]* @__dfsan_arg_tls to i[[#SBITS]]*), align [[ALIGN]]
[dfsan] Tracking origins at phi nodes This is a part of https://reviews.llvm.org/D95835. Reviewed-by: morehouse Differential Revision: https://reviews.llvm.org/D98268
2021-03-09 12:13:16 +08:00
; CHECK: br i1 %c, label %next, label %done
; CHECK: next:
; CHECK: br i1 %c, label %T, label %F
; CHECK: T:
; CHECK: [[BS_NE:%.*]] = icmp ne i[[#SBITS]] [[BS]], 0
; CHECK: [[BAO_T:%.*]] = select i1 [[BS_NE]], i32 [[BO]], i32 [[AO]]
; CHECK: br label %done
; CHECK: F:
; CHECK: [[AS_NE:%.*]] = icmp ne i[[#SBITS]] [[AS]], 0
; CHECK: [[BAO_F:%.*]] = select i1 [[AS_NE]], i32 [[AO]], i32 [[BO]]
; CHECK: br label %done
; CHECK: done:
; CHECK: [[PO:%.*]] = phi i32 [ [[BAO_T]], %T ], [ [[BAO_F]], %F ], [ [[AO]], %entry ]
; CHECK: store i32 [[PO]], i32* @__dfsan_retval_origin_tls, align 4
entry:
br i1 %c, label %next, label %done
next:
br i1 %c, label %T, label %F
T:
%sum = add i32 %a, %b
br label %done
F:
%diff = sub i32 %b, %a
br label %done
done:
%r = phi i32 [%sum, %T], [%diff, %F], [%a, %entry]
ret i32 %r
}