search for: asanasm

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2017 Aug 04
2
Bug or incorrect use of inline asm?
...LLVM appears to be optimizing the addressing mode, and the optimizer > is being more lenient on this detail so you're getting lucky when the > +4 can be combined with an existing %rsp offset. Things break down when part of the offset is a linktime constant: ``` source_filename = "asanasm.d" target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128" target triple = "x86_64-pc-windows-msvc" @globVar = global [2 x i32] [i32 66051, i32 66051] define void @_D7asanasm8offconstFZv() { call void asm sideeffect "movdqa 4$0, %xmm7", "*m,~{xmm7}&qu...
2017 Aug 03
4
Bug or incorrect use of inline asm?
Hi all, I stumbled upon either a bug, or we are emitting wrong inline asm code. The testcase is: ``` source_filename = "testcase.d" target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128" target triple = "x86_64-apple-macosx" define void @_D7asanasm3fooFZv() { %a = alloca [4 x i32], align 32 call void asm sideeffect "movl %ebx, 4+$0", "=*m,~{memory}"([4 x i32]* %a) ret void } ``` When I try to compile this to assembly code with llc, llc errors. > llc testcase.ll -o testcase.s -O0 <inline asm>:1:16: error: un...