[PATCH] D81304: [llvm][SveEmitter] Emit the bfloat version of `svld1ro`.

[Sander de Smalen via Phabricator via cfe-commits]

sdesmalen added inline comments.


================
Comment at: clang/test/CodeGen/aarch64-sve-intrinsics/acle_sve_ld1ro-bfloat.c:1
+// RUN: %clang_cc1 -D__ARM_FEATURE_SVE_MATMUL_FP64 -D__ARM_FEATURE_BF16_SCALAR_ARITHMETIC -D__ARM_FEATURE_SVE -triple aarch64-none-linux-gnu -target-feature +sve -target-feature +bf16 -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -emit-llvm -o - %s | FileCheck %s
+// RUN: %clang_cc1 -D__ARM_FEATURE_SVE_MATMUL_FP64 -D__ARM_FEATURE_BF16_SCALAR_ARITHMETIC -D__ARM_FEATURE_SVE -DSVE_OVERLOADED_FORMS -triple aarch64-none-linux-gnu -target-feature +sve -target-feature +bf16 -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -emit-llvm -o - %s | FileCheck %s
----------------
fpetrogalli wrote:
> sdesmalen wrote:
> > stuij wrote:
> > > There should be no dependency on `-fallow-half-arguments-and-returns`. For bfloat we should use `-mfloat-abi hard`. Does this work for `-mfloat-abi softfp`?
> > `-fallow-half-arguments-and-returns` isn't strictly needed for this test, we just use the same RUN line for all the ACLE tests and we needed this for `__fp16` in some of the tests.
> > 
> > I don't believe that `-mfloat-abi softfp` is supported for AArch64.
> @stuij - the following lines work, one with `softfp` and one with `hard`:
> 
> ```
> // RUN: %clang_cc1 -D__ARM_FEATURE_SVE_MATMUL_FP64 -D__ARM_FEATURE_BF16_SCALAR_ARITHMETIC -D__ARM_FEATURE_SVE -DSVE_OVERLOADED_FORMS -triple aarch64-none-linux-gnu -target-feature +sve -target\
> -feature +bf16 -mfloat-abi softfp -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -emit-llvm -o - %s | FileCheck %s
> // RUN: %clang_cc1 -D__ARM_FEATURE_SVE_MATMUL_FP64 -D__ARM_FEATURE_BF16_SCALAR_ARITHMETIC -D__ARM_FEATURE_SVE -DSVE_OVERLOADED_FORMS -triple aarch64-none-linux-gnu -target-feature +sve -target\
> -feature +bf16 -mfloat-abi hard -fallow-half-arguments-and-returns -S -O1 -Werror -Wall -emit-llvm -o - %s | FileCheck %s
> ```
> 
> @sdesmalen I am not an experer here, but there is a test which targets aarch64 that uses `softfp` (see `clang/test/CodeGen/arm-bf16-params-returns.c`). The following line in that test clearly targets `aarch64`:
> 
> ```
> // RUN: %clang_cc1 -triple aarch64-arm-none-eabi -target-abi aapcs -mfloat-abi softfp -target-feature +bf16 -target-feature +neon -emit-llvm -O2 -o - %s | opt -S -mem2reg -sroa | FileCheck %s \
> --check-prefix=CHECK64-SOFTFP
> ```
> 
> @both - should I update the test with the two extra RUN lines mentioned up in the message?
> @sdesmalen I am not an experer here, but there is a test which targets aarch64 that uses softfp (see clang/test/CodeGen/arm-bf16-params-returns.c). The following line in that test clearly targets aarch64:
`clang/test/CodeGen/arm-bf16-params-returns.c` also shows that setting `softfp` has no effect for AArch64.

> @both - should I update the test with the two extra RUN lines mentioned up in the message?
No, I think the extra RUN lines aren't necessary.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D81304/new/

https://reviews.llvm.org/D81304