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<span style="font-family: calibri, arial, helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);">Hello,</span></div>
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<span style="font-family: calibri, arial, helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);">The compiler really shouldn't crash, we should raise a bug report for that, but I think this is an options problem.</span></div>
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<br>
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<span style="font-family: calibri, arial, helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);">Looks like you want to target FP16 because you're using </span><span style="color: rgb(0, 0, 0); font-family: calibri, arial, helvetica, sans-serif; font-size: 12pt; background-color: rgba(0, 0, 0, 0); display: inline !important;">-target-feature
+fullfp16. </span><span style="background-color: rgba(0, 0, 0, 0); color: rgb(0, 0, 0); font-family: calibri, arial, helvetica, sans-serif; font-size: 12pt;">FP16 is an extension to Armv8.2-A, and so something like this worked for me:</span></div>
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<span style="color: rgb(32, 31, 30); font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif; font-size: 15px; background-color: rgb(255, 255, 255); display: inline !important"><br>
</span></div>
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<span style="color: rgb(0, 0, 0); font-family: calibri, arial, helvetica, sans-serif; font-size: 12pt; background-color: rgba(0, 0, 0, 0); display: inline !important;"> clang++ --target=arm-arm-eabihf -march=armv8.2a+fp16 arm.cpp -S -o - -O3</span><span style="color: rgb(32, 31, 30); font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif; font-size: 15px; background-color: rgb(255, 255, 255); display: inline !important"><br>
</span></div>
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<span style="color: rgb(32, 31, 30); font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif; font-size: 15px; background-color: rgb(255, 255, 255); display: inline !important"><br>
</span></div>
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<span style="color: rgb(0, 0, 0); font-family: calibri, arial, helvetica, sans-serif; font-size: 12pt; background-color: rgba(0, 0, 0, 0); display: inline !important;">and gives:</span></div>
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<span style="color: rgb(32, 31, 30); font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif; font-size: 15px; background-color: rgb(255, 255, 255); display: inline !important"><br>
</span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="color: rgb(32, 31, 30); font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif; font-size: 15px; background-color: rgb(255, 255, 255); display: inline !important"><span style="font-family: calibri, arial, helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);">
_Z18test_vst4_lane_f16PDh13float16x4x4_t:</span>
<div><span style="font-family: calibri, arial, helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);"> vst4.16 {d0[3], d1[3], d2[3], d3[3]}, [r0]</span><br>
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<span style="font-family: calibri, arial, helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);"> bx lr</span><br>
</span></div>
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<span style="color: rgb(32, 31, 30); font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif; font-size: 15px; background-color: rgb(255, 255, 255); display: inline !important"><span><br>
</span></span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="color: rgb(32, 31, 30); font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif; font-size: 15px; background-color: rgb(255, 255, 255); display: inline !important"><span style="font-family: calibri, arial, helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);">Is
that what you were looking for?</span></span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="color: rgb(32, 31, 30); font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif; font-size: 15px; background-color: rgb(255, 255, 255); display: inline !important"><span style="font-family: calibri, arial, helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);">Cheers,</span></span></div>
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">
<span style="color: rgb(32, 31, 30); font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif; font-size: 15px; background-color: rgb(255, 255, 255); display: inline !important"><span style="font-family: calibri, arial, helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgba(0, 0, 0, 0);">Sjoerd.</span></span></div>
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<span style="color: rgb(32, 31, 30); font-family: "Segoe UI", "Segoe UI Web (West European)", "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, "Helvetica Neue", sans-serif; font-size: 15px; background-color: rgb(255, 255, 255); display: inline !important"><br>
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<span title=":slight_smile:"><br>
</span></div>
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<span title=":slight_smile:"><br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> llvm-dev <llvm-dev-bounces@lists.llvm.org> on behalf of Nancy via llvm-dev <llvm-dev@lists.llvm.org><br>
<b>Sent:</b> 12 July 2019 06:59<br>
<b>To:</b> cfe-dev@lists.llvm.org; LLVM Developers Mailing List<br>
<b>Subject:</b> [llvm-dev] [cfe-dev] ARM float16 intrinsic test</font>
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<div>Dear list,</div>
<div><br>
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<div>git checkout llvmorg-8.0.0 -b llvm8.0<br>
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<div></div>
<div>cmake -G "Unix Makefiles" ../llvm-project/llvm -DCMAKE_BUILD_TYPE=Debug -DLLVM_ENABLE_PROJECTS="clang;lld" -DLLVM_TARGETS_TO_BUILD="X86;NVPTX;AMDGPU;ARM;AArch64"</div>
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<div>[arm.cpp]</div>
<div>#define vst4_lane_f16(__p0, __p1, __p2) __extension__ ({ \<br>
float16x4x4_t __s1 = __p1; \<br>
__builtin_neon_vst4_lane_v(__p0, __s1.val[0], __s1.val[1], __s1.val[2], __s1.val[3], __p2, 8); \<br>
})<br>
typedef __fp16 float16_t;<br>
typedef __attribute__((neon_vector_type(4))) float16_t float16x4_t;<br>
typedef struct float16x4x4_t {<br>
float16x4_t val[4];<br>
} float16x4x4_t;<br>
void test_vst4_lane_f16(float16_t * a, float16x4x4_t b) {<br>
vst4_lane_f16(a, b, 3); <br>
}<br>
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<div>I tried:</div>
<div>$$COMP_ROOT/clang -cc1 -triple thumbv7s-apple-darwin -target-abi apcs-gnu -target-cpu swift -fallow-half-arguments-and-returns -target-feature +fullfp16 -ffreestanding -disable-O0-optnone -emit-llvm -o arm.ll arm.cpp</div>
<div>$cat arm.ll | grep llvm.arm<br>
</div>
<div> call void @llvm.arm.neon.vst4lane.p0i8.v4f16(i8* %4, <4 x half> %13, <4 x half> %14, <4 x half> %15, <4 x half> %16, i32 3, i32 2)<br>
declare void @llvm.arm.neon.vst4lane.p0i8.v4f16(i8*, <4 x half>, <4 x half>, <4 x half>, <4 x half>, i32, i32) #1</div>
<div>$$COMP_ROOT/llc arm.ll</div>
<div>unhandled vld/vst lane type<br>
UNREACHABLE executed at /home/nancy/rpp_llvm/llvm-project/llvm/lib/Target/ARM/ARMISelDAGToDAG.cpp:2072!</div>
<div><br>
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<div>May I know how to compile this .cpp correctly from FE to BE?<br>
</div>
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-- <br>
<div dir="ltr" class="x_gmail_signature">Best Regards,<br>
Yu Rong Tan<br>
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