<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">gcc/clang have a syntax for that which works fine for me:<div class=""><br class=""></div><div class="">$ cat t.c</div><div class=""><div class="">void thumb_up(void) asm("π");</div><div class=""><br class=""></div><div class="">void thumb_up(void) {</div><div class="">}</div><div class="">$ clang -O3 -S t.c -o -</div><div class="">...</div><div class=""><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>.globl<span class="Apple-tab-span" style="white-space:pre"> </span>"π"</div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>.p2align<span class="Apple-tab-span" style="white-space:pre"> </span>4, 0x90</div><div class="">"π": ## @"\01\F0\9F\91\8D"</div></div><div class="">...</div><div class=""><br class=""></div><div class="">- Matthias</div><div><br class=""><blockquote type="cite" class=""><div class="">On Dec 12, 2017, at 5:30 AM, ORiordan, Martin via llvm-dev <<a href="mailto:llvm-dev@lists.llvm.org" class="">llvm-dev@lists.llvm.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="WordSection1" style="page: WordSection1; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class="">I am trying to support an experimental DSL that uses non-C identifiers, but I want to write the implementation of the runtime support libraries for this DSL in C. The compiler is built using the LLVM v5.0.0 release branch.<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class="">To do this I thought I could simply write:<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt 36pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Courier New";" class="">int foo() { return 42; } // The C implementation<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt 36pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Courier New";" class="">asm(".alias nonCname foo"); // Make the non-C name be a synonym for the C implementation<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class="">If I compile with β</span><span style="font-size: 12pt; font-family: "Courier New";" class="">-S βemit-llvm</span><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class="">β, the LL file contains:<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt 36pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Courier New";" class="">module asm ".alias nonCname foo"<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt 36pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Courier New";" class="">define i32 @foo() local_unnamed_addr #0 {<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt 36pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Courier New";" class=""> ret i32 42<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt 36pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Courier New";" class="">}<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class="">That is, the inline-assembly precedes the function definition. The resulting assembly code for the target also has the β</span><span style="font-size: 12pt; font-family: "Courier New";" class="">.alias nonCname foo</span><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class="">β before the definition for the function β</span><span style="font-size: 12pt; font-family: "Courier New";" class="">foo</span><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class="">β. When I edit the LL file to place the inline-assembly after the function definition, it makes no difference to the emitted assembly code for the target, it is still placed first.<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class="">Our assembler requires that the symbol being aliased has been defined before the β</span><span style="font-size: 12pt; font-family: "Courier New";" class="">.alias</span><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class="">β directive; but I canβt get LLVM to do this, and it aggregates all file-scoped (or module-scoped) inline assembly before the code generated for the functions and data.<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class="">Since the semantics of inline-assembly are very murky, I donβt know if this is a bug or by-design.<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class="">Is there anyway of writing C code that will preserve the relative ordering of file-scoped function, data and inline-assembly definitions?<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class="">Thanks,<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class=""> MartinO<o:p class=""></o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0cm 0cm 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif;" class=""><span style="font-size: 12pt; font-family: "Book Antiqua", serif;" class=""><o:p class=""> </o:p></span></div></div><p style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">--------------------------------------------------------------<br class="">Intel Research and Development Ireland Limited<br class="">Registered in Ireland<br class="">Registered Office: Collinstown Industrial Park, Leixlip, County Kildare<br class="">Registered Number: 308263</p><p style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). 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