mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-01-16 14:31:59 +00:00
a77d9f726a
Summary: When the -dfsan-debug-nonzero-labels parameter is supplied, the code is instrumented such that when a call parameter, return value or load produces a nonzero label, the function __dfsan_nonzero_label is called. The idea is that a debugger breakpoint can be set on this function in a nominally label-free program to help identify any bugs in the instrumentation pass causing labels to be introduced. Reviewers: eugenis CC: llvm-commits Differential Revision: http://llvm-reviews.chandlerc.com/D1405 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188472 91177308-0d34-0410-b5e6-96231b3b80d8
24 lines
923 B
LLVM
24 lines
923 B
LLVM
; RUN: opt < %s -dfsan -dfsan-args-abi -dfsan-debug-nonzero-labels -S | FileCheck %s
|
|
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"
|
|
|
|
declare i32 @g()
|
|
|
|
; CHECK: define { i32, i16 } @f(i32, i16)
|
|
define i32 @f(i32) {
|
|
; CHECK: [[LOCALLABELALLOCA:%.*]] = alloca i16
|
|
; CHECK: [[ARGCMP:%.*]] = icmp ne i16 %1, 0
|
|
; CHECK: br i1 [[ARGCMP]]
|
|
%i = alloca i32
|
|
store i32 %0, i32* %i
|
|
; CHECK: [[CALL:%.*]] = call { i32, i16 } @g()
|
|
; CHECK: [[CALLLABEL:%.*]] = extractvalue { i32, i16 } [[CALL]], 1
|
|
; CHECK: [[CALLCMP:%.*]] = icmp ne i16 [[CALLLABEL]], 0
|
|
; CHECK: br i1 [[CALLCMP]]
|
|
%call = call i32 @g()
|
|
; CHECK: [[LOCALLABEL:%.*]] = load i16* [[LOCALLABELALLOCA]]
|
|
; CHECK: [[LOCALCMP:%.*]] = icmp ne i16 [[LOCALLABEL]], 0
|
|
; CHECK: br i1 [[LOCALCMP]]
|
|
%load = load i32* %i
|
|
ret i32 %load
|
|
}
|