search for: lcfi0

...tractvalue { i8*, i8* } %0, 1 %2 = bitcast i8* %1 to void ()* call void %2() [ "deopt"() ] ret void } We get this output machine code for x86_64: _testFunc: ## @testFunc .cfi_startproc ## BB#0: ## %entry pushq %rax Lcfi0: .cfi_def_cfa_offset 16 callq _getCode callq *%rax Ltmp0: popq %rax retq Without the deopt operand bundle: _testFunc: ## @testFunc .cfi_startproc ## BB#0: ## %entry pushq %rax Lcfi0: .cfi_def_cfa_offs...

...g about, and on what platform? The results I'm seeing clearly have both gcc and clang on Darwin generating different LSDAs for your cleanup examples and your catch-all examples. Here is the output I see from gcc-4.2 for your cleanup example: .text .globl __Z3barv __Z3barv: LFB2: pushq %rbp LCFI0: movq %rsp, %rbp LCFI1: pushq %rbx LCFI2: subq $40, %rsp LCFI3: leaq -17(%rbp), %rdi call __ZN3BobC1Ev leaq -18(%rbp), %rdi call __ZN3BobC1Ev leaq -19(%rbp), %rdi call __ZN3BobC1Ev LEHB0: call __Z3foov LEHE0: <snip> .section __TEXT,__gcc_except_tab GCC_except_table0: LLSDA2: .by...

...ertPoint invalidates the previous call to SetCurrentDebugLocation) But then there is another problem.... % cat dummy.c void foo() {} % clang -O -c -gmlt -fsanitize-coverage=func,trace-pc-guard -S dummy.c -o - .LBB0_1: .loc 1 1 0 # dummy.c:1:0 pushq %rax .Lcfi0: .cfi_def_cfa_offset 16 movl $.L__sancov_gen_, %edi callq __sanitizer_cov_trace_pc_guard % clang -O -c -gmlt -fsanitize-coverage=func,trace-pc-guard -S dummy.c -mllvm -use-unknown-locations -o - .LBB0_1: .loc 1 1 0 is_stmt 0 # dummy.c:1:0...

There is already –mllvm –use-unknown-locations which ought to trigger this. Don't need my patch. --paulr From: Kostya Serebryany [mailto:kcc at google.com] Sent: Thursday, December 01, 2016 4:08 PM To: Robinson, Paul Cc: llvm-dev at lists.llvm.org Subject: Re: [llvm-dev] Libfuzzer depending on uninitialized debug info On Thu, Dec 1, 2016 at 3:37 PM, Robinson, Paul <paul.robinson at

John, I'm still not sure what you're talking about, I have included the assembly output from two compilations, one with a user explicit catch-all, one with only an implicit cleanup, the DWARF Action Table and Types Table are absolutely identical, as are the indexes used to reference the Action Table from the region maps. -Peter Lawrence.

...problem.... > > > > % cat dummy.c > > void foo() {} > > > > % clang -O -c -gmlt -fsanitize-coverage=func,trace-pc-guard -S dummy.c > -o - > > .LBB0_1: > > .loc 1 1 0 # dummy.c:1:0 > > pushq %rax > > .Lcfi0: > > .cfi_def_cfa_offset 16 > > movl $.L__sancov_gen_, %edi > > callq __sanitizer_cov_trace_pc_guard > > > > % clang -O -c -gmlt -fsanitize-coverage=func,trace-pc-guard -S dummy.c > -mllvm -use-unknown-locations -o - > > > &g...

...ertPoint invalidates the previous call to SetCurrentDebugLocation) But then there is another problem.... % cat dummy.c void foo() {} % clang -O -c -gmlt -fsanitize-coverage=func,trace-pc-guard -S dummy.c -o - .LBB0_1: .loc 1 1 0 # dummy.c:1:0 pushq %rax .Lcfi0: .cfi_def_cfa_offset 16 movl $.L__sancov_gen_, %edi callq __sanitizer_cov_trace_pc_guard % clang -O -c -gmlt -fsanitize-coverage=func,trace-pc-guard -S dummy.c -mllvm -use-unknown-locations -o - .LBB0_1: .loc 1 1 0 is_stmt 0 # dummy.c:1:0...

Let's go directly to the example struct S { double dummy1; double dummy2; }; S bar(); S foo() { return bar(); } This is the result of g++ -c -S -O2 (focus on the final `ret'): __Z3foov: LFB0: pushl %ebp LCFI0: movl %esp, %ebp LCFI1: pushl %ebx LCFI2: subl $20, %esp LCFI3: movl 8(%ebp), %ebx movl %ebx, (%esp) call __Z3barv pushl %eax movl %ebx, %eax movl -4(%ebp), %ebx leave ret $4 This is the result of cl -O2 -c -Fa (again, focus on the final `ret') PUBLIC ?foo@@YA?AUS@@XZ ; foo EXT...

Hello, Here is my first speedup patch. Like 10-11%. No IDCT yet. Please feel free to comment my code or even better think about improvements. :) I belive my routines are not so bad, maybe one day they will be even more faster. What needs to be optimized is the loop filter fuction. I have no ideas now how to do it. It does not leave much space for parallel stuff, copying memory from lot of

...t;> .globl multiply >>>>> .p2align 4, 0x90 >>>>> .type multiply, at function >>>>> multiply: # @multiply >>>>> .cfi_startproc >>>>> # BB#0: >>>>> push rbp >>>>> .Lcfi0: >>>>> .cfi_def_cfa_offset 16 >>>>> push r15 >>>>> .Lcfi1: >>>>> .cfi_def_cfa_offset 24 >>>>> push r14 >>>>> .Lcfi2: >>>>> .cfi_def_cfa_offset 32 >>>>> push r12 >>>>&g...

Hi, My understanding of a "dead" register is a def that is never used. However, when I dump the MI after reg alloc on a simple program I see the following sequence: ADJCALLSTACKDOWN64 0, 0, 0, *implicit-def dead %rsp*, implicit-def dead %eflags, implicit-def dead %ssp, implicit %rsp, implicit %ssp CALL64pcrel32 @foo, <regmask %bh %bl %bp %bpl %bx %ebp %ebx %rbp %rbx %r12 %r13 %r14

Firstly, do you need "main.dsp" defined as an external symbol, or can all external references go via "main"? If the answer is the latter, that will make the solution simpler. If only the latter, you will need to make a change to LLVM here: http://llvm-cs.pcc.me.uk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp#650 Basically you would need to add a hook to the TargetLoweringObjectFile