Displaying 2 results from an estimated 2 matches for "_getvec3".
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getvec3
2015 May 04
2
[LLVMdev] Incorrect code generated for arm64
...el of optimization for arm64 gives incorrect code, unless my test case above is triggering some undefined behaviour that I’m not aware of. Other architectures appear to work OK.
$ clang -arch arm64 -O1 test.c -S -o -
.section __TEXT,__text,regular,pure_instructions
.ios_version_min 5, 0
.globl _getVec3
.align 2
_getVec3: ; @getVec3
; BB#0:
b _getVec2
.subsections_via_symbols
- - - -
I’m happy to file a bug for this, but not sure quite where it belongs - clang, LLVM or direct to Apple. Can someone test the top of tree and see if it suffers the same issue?
I’m c...
2015 May 04
2
[LLVMdev] Incorrect code generated for arm64
...v1, v2;} vec3;
>
> vec2 getVec2();
>
> vec3 getVec3()
> {
> vec2 myVec = getVec2();
>
> vec3 res;
> res.v0 = myVec.v0;
> res.v1 = myVec.v1;
> res.v2 = 1;
> return res;
> }
>
> .section __TEXT,__text,regular,pure_instructions
> .globl _getVec3
> .align 2
> _getVec3: ; @getVec3
> ; BB#0:
> stp fp, lr, [sp, #-16]!
> mov fp, sp
> bl _getVec2
> fmov s2, #1.000000e+00
> ldp fp, lr, [sp], #16
> ret
>
>
> On Mon, May 4, 2015 at 1:19 PM, Simon Taylor <simontaylor1 at...