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view tests/mini/asm10.d @ 1318:bac742d3a72d
Make sure this testcase keeps crashing with -O3.
Recent optimization improvements made LLVM realize the store-to-null was
unavoidable, so it deleted all of main() and replaced it with 'unreachable'.
Because the body of main() no longer even contained a return instruction,
calling it caused random code to be ran instead. This happened to be the code
that links in the ModuleInfo on my machine, which then returned "successfully".
author | Frits van Bommel <fvbommel wxs.nl> |
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date | Sat, 09 May 2009 00:55:47 +0200 |
parents | 97d80437cb80 |
children |
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module asm10; struct S { ushort first; ushort second; int unaccessed; } void main() { auto s = S(512, 42, -1); ushort x = 0; version(D_InlineAsm_X86) { asm { lea EAX, s; mov CX, S.second[EAX]; mov x, CX; mov S.first[EAX], 640; } } else version(D_InlineAsm_X86_64) { asm { lea RAX, s; mov CX, S.second[RAX]; mov x, CX; mov S.first[RAX], 640; } } assert(x == 42); assert(s.first == 640); assert(s.second == 42); assert(s.unaccessed == -1); }