diff --git a/llvm/test/CodeGen/ARM/fp16-return-pr60510.ll b/llvm/test/CodeGen/ARM/fp16-return-pr60510.ll new file mode 100644 --- /dev/null +++ b/llvm/test/CodeGen/ARM/fp16-return-pr60510.ll @@ -0,0 +1,210 @@ +; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --filter-out "(\.v?save|push|pop)" + +; No FP16/BF16 +; RUN: llc -mtriple=arm-none-eabi -float-abi=soft -mattr=+armv8.2-a,+fp-armv8,-fullfp16,-bf16,-neon %s -o - | FileCheck %s --check-prefixes=NO-FP16-SOFT +; RUN: llc -mtriple=thumb-none-eabi -float-abi=soft -mattr=+armv8.2-a,+fp-armv8,-fullfp16,-bf16,-neon %s -o - | FileCheck %s --check-prefixes=NO-FP16-SOFT +; RUN: llc -mtriple=arm-none-eabi -mattr=+armv8.2-a,+fp-armv8,-fullfp16,-bf16,-neon %s -o - | FileCheck %s --check-prefixes=NO-FP16-SOFT +; RUN: llc -mtriple=thumb-none-eabi -mattr=+armv8.2-a,+fp-armv8,-fullfp16,-bf16,-neon %s -o - | FileCheck %s --check-prefixes=NO-FP16-SOFT +; RUN: llc -mtriple=arm-none-eabihf -mattr=+armv8.2-a,+fp-armv8,-fullfp16,-bf16,-neon %s -o - | FileCheck %s --check-prefixes=NO-FP16-HARD +; RUN: llc -mtriple=thumb-none-eabihf -mattr=+armv8.2-a,+fp-armv8,-fullfp16,-bf16,-neon %s -o - | FileCheck %s --check-prefixes=NO-FP16-HARD + +; FP16/BF16 +; RUN: llc -mtriple=arm-none-eabi -float-abi=soft -mattr=+armv8.2-a,+fp-armv8,+fullfp16,+bf16,-neon %s -o - | FileCheck %s --check-prefixes=FP16-SOFT +; RUN: llc -mtriple=thumb-none-eabi -float-abi=soft -mattr=+armv8.2-a,+fp-armv8,+fullfp16,+bf16,-neon %s -o - | FileCheck %s --check-prefixes=FP16-SOFT +; RUN: llc -mtriple=arm-none-eabi -mattr=+armv8.2-a,+fp-armv8,+fullfp16,+bf16,-neon %s -o - | FileCheck %s --check-prefixes=FP16-SOFT +; RUN: llc -mtriple=thumb-none-eabi -mattr=+armv8.2-a,+fp-armv8,+fullfp16,+bf16,-neon %s -o - | FileCheck %s --check-prefixes=FP16-SOFT +; RUN: llc -mtriple=arm-none-eabihf -mattr=+armv8.2-a,+fp-armv8,+fullfp16,+bf16,-neon %s -o - | FileCheck %s --check-prefixes=FP16-HARD +; RUN: llc -mtriple=thumb-none-eabihf -mattr=+armv8.2-a,+fp-armv8,+fullfp16,+bf16,-neon %s -o - | FileCheck %s --check-prefixes=FP16-HARD + +; PR60510 showed a bug where the return from `*_inner` was getting "lost" by an +; optimisation, and a garbage value was being left in `s0`. + +declare dso_local float @other(float) nounwind +declare dso_local void @fp16_sink(half) nounwind +declare dso_local void @bf16_sink(bfloat) nounwind + +declare dso_local bfloat @fp16_inner() nounwind +declare dso_local bfloat @bf_inner() nounwind + +define half @fp16_out_call_oneuse(float %arg) nounwind { +; NO-FP16-SOFT-LABEL: fp16_out_call_oneuse: +; NO-FP16-SOFT: @ %bb.0: +; NO-FP16-SOFT: mov r4, r0 +; NO-FP16-SOFT: bl fp16_inner +; NO-FP16-SOFT: mov r5, r0 +; NO-FP16-SOFT: mov r0, r4 +; NO-FP16-SOFT: bl other +; NO-FP16-SOFT: mov r0, r5 +; +; NO-FP16-HARD-LABEL: fp16_out_call_oneuse: +; NO-FP16-HARD: @ %bb.0: +; NO-FP16-HARD: vmov.f32 s16, s0 +; NO-FP16-HARD: bl fp16_inner +; NO-FP16-HARD: vmov.f32 s18, s0 +; NO-FP16-HARD: vmov.f32 s0, s16 +; NO-FP16-HARD: bl other +; NO-FP16-HARD: vmov.f32 s0, s18 +; +; FP16-SOFT-LABEL: fp16_out_call_oneuse: +; FP16-SOFT: @ %bb.0: +; FP16-SOFT: mov r4, r0 +; FP16-SOFT: bl fp16_inner +; FP16-SOFT: mov r5, r0 +; FP16-SOFT: mov r0, r4 +; FP16-SOFT: bl other +; FP16-SOFT: vmov.f16 s0, r5 +; FP16-SOFT: vmov r0, s0 +; +; FP16-HARD-LABEL: fp16_out_call_oneuse: +; FP16-HARD: @ %bb.0: +; FP16-HARD: vmov.f32 s16, s0 +; FP16-HARD: bl fp16_inner +; FP16-HARD: vmov.f32 s0, s16 +; FP16-HARD: bl other + %call = call half @fp16_inner() + %call1 = call float @other(float %arg) + ret half %call +} + +define half @fp16_out_call_multiuse(float %arg) nounwind { +; NO-FP16-SOFT-LABEL: fp16_out_call_multiuse: +; NO-FP16-SOFT: @ %bb.0: +; NO-FP16-SOFT: mov r4, r0 +; NO-FP16-SOFT: bl fp16_inner +; NO-FP16-SOFT: mov r5, r0 +; NO-FP16-SOFT: mov r0, r4 +; NO-FP16-SOFT: bl other +; NO-FP16-SOFT: mov r0, r5 +; NO-FP16-SOFT: bl fp16_sink +; NO-FP16-SOFT: mov r0, r5 +; +; NO-FP16-HARD-LABEL: fp16_out_call_multiuse: +; NO-FP16-HARD: @ %bb.0: +; NO-FP16-HARD: vmov.f32 s16, s0 +; NO-FP16-HARD: bl fp16_inner +; NO-FP16-HARD: vmov.f32 s18, s0 +; NO-FP16-HARD: vmov.f32 s0, s16 +; NO-FP16-HARD: bl other +; NO-FP16-HARD: vmov.f32 s0, s18 +; NO-FP16-HARD: bl fp16_sink +; NO-FP16-HARD: vmov.f32 s0, s18 +; +; FP16-SOFT-LABEL: fp16_out_call_multiuse: +; FP16-SOFT: @ %bb.0: +; FP16-SOFT: mov r4, r0 +; FP16-SOFT: bl fp16_inner +; FP16-SOFT: mov r5, r0 +; FP16-SOFT: mov r0, r4 +; FP16-SOFT: bl other +; FP16-SOFT: vmov.f16 s16, r5 +; FP16-SOFT: vmov.f16 r0, s16 +; FP16-SOFT: bl fp16_sink +; FP16-SOFT: vmov r0, s16 +; +; FP16-HARD-LABEL: fp16_out_call_multiuse: +; FP16-HARD: @ %bb.0: +; FP16-HARD: vmov.f32 s16, s0 +; FP16-HARD: bl fp16_inner +; FP16-HARD: vmov.f32 s0, s16 +; FP16-HARD: bl other +; FP16-HARD: vmov.f16 r0, s0 +; FP16-HARD: vmov.f32 s16, s0 +; FP16-HARD: vmov s0, r0 +; FP16-HARD: bl fp16_sink +; FP16-HARD: vmov.f32 s0, s16 + %call = call half @fp16_inner() + %call1 = call float @other(float %arg) + call void @fp16_sink(half %call) + ret half %call +} + +define bfloat @bf_out_call_oneuse(float %arg) nounwind { +; NO-FP16-SOFT-LABEL: bf_out_call_oneuse: +; NO-FP16-SOFT: @ %bb.0: +; NO-FP16-SOFT: mov r4, r0 +; NO-FP16-SOFT: bl bf_inner +; NO-FP16-SOFT: mov r5, r0 +; NO-FP16-SOFT: mov r0, r4 +; NO-FP16-SOFT: bl other +; NO-FP16-SOFT: mov r0, r5 +; +; NO-FP16-HARD-LABEL: bf_out_call_oneuse: +; NO-FP16-HARD: @ %bb.0: +; NO-FP16-HARD: vmov.f32 s16, s0 +; NO-FP16-HARD: bl bf_inner +; NO-FP16-HARD: vmov.f32 s18, s0 +; NO-FP16-HARD: vmov.f32 s0, s16 +; NO-FP16-HARD: bl other +; NO-FP16-HARD: vmov.f32 s0, s18 +; +; FP16-SOFT-LABEL: bf_out_call_oneuse: +; FP16-SOFT: @ %bb.0: +; FP16-SOFT: mov r4, r0 +; FP16-SOFT: bl bf_inner +; FP16-SOFT: mov r5, r0 +; FP16-SOFT: mov r0, r4 +; FP16-SOFT: bl other +; FP16-SOFT: mov r0, r5 +; +; FP16-HARD-LABEL: bf_out_call_oneuse: +; FP16-HARD: @ %bb.0: +; FP16-HARD: vmov.f32 s16, s0 +; FP16-HARD: bl bf_inner +; FP16-HARD: vmov.f32 s18, s0 +; FP16-HARD: vmov.f32 s0, s16 +; FP16-HARD: bl other +; FP16-HARD: vmov.f32 s0, s18 + %call = call bfloat @bf_inner() + %call1 = call float @other(float %arg) + ret bfloat %call +} + +define bfloat @bf_out_call_multiuse(float %arg) nounwind { +; NO-FP16-SOFT-LABEL: bf_out_call_multiuse: +; NO-FP16-SOFT: @ %bb.0: +; NO-FP16-SOFT: mov r4, r0 +; NO-FP16-SOFT: bl bf_inner +; NO-FP16-SOFT: mov r5, r0 +; NO-FP16-SOFT: mov r0, r4 +; NO-FP16-SOFT: bl other +; NO-FP16-SOFT: mov r0, r5 +; NO-FP16-SOFT: bl bf16_sink +; NO-FP16-SOFT: mov r0, r5 +; +; NO-FP16-HARD-LABEL: bf_out_call_multiuse: +; NO-FP16-HARD: @ %bb.0: +; NO-FP16-HARD: vmov.f32 s16, s0 +; NO-FP16-HARD: bl bf_inner +; NO-FP16-HARD: vmov.f32 s18, s0 +; NO-FP16-HARD: vmov.f32 s0, s16 +; NO-FP16-HARD: bl other +; NO-FP16-HARD: vmov.f32 s0, s18 +; NO-FP16-HARD: bl bf16_sink +; NO-FP16-HARD: vmov.f32 s0, s18 +; +; FP16-SOFT-LABEL: bf_out_call_multiuse: +; FP16-SOFT: @ %bb.0: +; FP16-SOFT: mov r4, r0 +; FP16-SOFT: bl bf_inner +; FP16-SOFT: mov r5, r0 +; FP16-SOFT: mov r0, r4 +; FP16-SOFT: bl other +; FP16-SOFT: mov r0, r5 +; FP16-SOFT: bl bf16_sink +; FP16-SOFT: mov r0, r5 +; +; FP16-HARD-LABEL: bf_out_call_multiuse: +; FP16-HARD: @ %bb.0: +; FP16-HARD: vmov.f32 s16, s0 +; FP16-HARD: bl bf_inner +; FP16-HARD: vmov.f32 s18, s0 +; FP16-HARD: vmov.f32 s0, s16 +; FP16-HARD: bl other +; FP16-HARD: vmov.f32 s0, s18 +; FP16-HARD: bl bf16_sink +; FP16-HARD: vmov.f32 s0, s18 + %call = call bfloat @bf_inner() + %call1 = call float @other(float %arg) + call void @bf16_sink(bfloat %call) + ret bfloat %call +}