[RISCV] Add basic Zfh inline assembly tests. NFC

The abi name test shows incorrect fcvt.d.h, fcvt.h.d, fcvt.f.h,
and fcvt.h.f instructions around the inline assembly.

diff --git a/llvm/test/CodeGen/RISCV/inline-asm-zfh-constraint-f.ll b/llvm/test/CodeGen/RISCV/inline-asm-zfh-constraint-f.ll
new file mode 100644 (file)
index 0000000..c9d601f
--- /dev/null
+++ b/llvm/test/CodeGen/RISCV/inline-asm-zfh-constraint-f.ll
@@ -0,0 +1,121 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=riscv32 -mattr=+experimental-zfh -verify-machineinstrs < %s \
+; RUN:   -target-abi=ilp32f | FileCheck -check-prefix=RV32ZFH %s
+; RUN: llc -mtriple=riscv64 -mattr=+experimental-zfh -verify-machineinstrs < %s \
+; RUN:   -target-abi=lp64f | FileCheck -check-prefix=RV64ZFH %s
+; RUN: llc -mtriple=riscv32 -mattr=+experimental-zfh,+d -verify-machineinstrs < %s \
+; RUN:   -target-abi=ilp32d | FileCheck -check-prefix=RV32DZFH %s
+; RUN: llc -mtriple=riscv64 -mattr=+experimental-zfh,+d -verify-machineinstrs < %s \
+; RUN:   -target-abi=lp64d | FileCheck -check-prefix=RV64DZFH %s
+
+@gh = external global half
+
+define half @constraint_f_half(half %a) nounwind {
+; RV32ZFH-LABEL: constraint_f_half:
+; RV32ZFH:       # %bb.0:
+; RV32ZFH-NEXT:    lui a0, %hi(gh)
+; RV32ZFH-NEXT:    flh ft0, %lo(gh)(a0)
+; RV32ZFH-NEXT:    #APP
+; RV32ZFH-NEXT:    fadd.h fa0, fa0, ft0
+; RV32ZFH-NEXT:    #NO_APP
+; RV32ZFH-NEXT:    ret
+;
+; RV64ZFH-LABEL: constraint_f_half:
+; RV64ZFH:       # %bb.0:
+; RV64ZFH-NEXT:    lui a0, %hi(gh)
+; RV64ZFH-NEXT:    flh ft0, %lo(gh)(a0)
+; RV64ZFH-NEXT:    #APP
+; RV64ZFH-NEXT:    fadd.h fa0, fa0, ft0
+; RV64ZFH-NEXT:    #NO_APP
+; RV64ZFH-NEXT:    ret
+;
+; RV32DZFH-LABEL: constraint_f_half:
+; RV32DZFH:       # %bb.0:
+; RV32DZFH-NEXT:    lui a0, %hi(gh)
+; RV32DZFH-NEXT:    flh ft0, %lo(gh)(a0)
+; RV32DZFH-NEXT:    #APP
+; RV32DZFH-NEXT:    fadd.h fa0, fa0, ft0
+; RV32DZFH-NEXT:    #NO_APP
+; RV32DZFH-NEXT:    ret
+;
+; RV64DZFH-LABEL: constraint_f_half:
+; RV64DZFH:       # %bb.0:
+; RV64DZFH-NEXT:    lui a0, %hi(gh)
+; RV64DZFH-NEXT:    flh ft0, %lo(gh)(a0)
+; RV64DZFH-NEXT:    #APP
+; RV64DZFH-NEXT:    fadd.h fa0, fa0, ft0
+; RV64DZFH-NEXT:    #NO_APP
+; RV64DZFH-NEXT:    ret
+  %1 = load half, half* @gh
+  %2 = tail call half asm "fadd.h $0, $1, $2", "=f,f,f"(half %a, half %1)
+  ret half %2
+}
+
+define half @constraint_f_half_abi_name(half %a) nounwind {
+; RV32ZFH-LABEL: constraint_f_half_abi_name:
+; RV32ZFH:       # %bb.0:
+; RV32ZFH-NEXT:    addi sp, sp, -16
+; RV32ZFH-NEXT:    fsw fs0, 12(sp) # 4-byte Folded Spill
+; RV32ZFH-NEXT:    lui a0, %hi(gh)
+; RV32ZFH-NEXT:    flh ft0, %lo(gh)(a0)
+; RV32ZFH-NEXT:    fcvt.s.h fa0, fa0
+; RV32ZFH-NEXT:    fcvt.s.h fs0, ft0
+; RV32ZFH-NEXT:    #APP
+; RV32ZFH-NEXT:    fadd.s ft0, fa0, fs0
+; RV32ZFH-NEXT:    #NO_APP
+; RV32ZFH-NEXT:    fcvt.h.s fa0, ft0
+; RV32ZFH-NEXT:    flw fs0, 12(sp) # 4-byte Folded Reload
+; RV32ZFH-NEXT:    addi sp, sp, 16
+; RV32ZFH-NEXT:    ret
+;
+; RV64ZFH-LABEL: constraint_f_half_abi_name:
+; RV64ZFH:       # %bb.0:
+; RV64ZFH-NEXT:    addi sp, sp, -16
+; RV64ZFH-NEXT:    fsw fs0, 12(sp) # 4-byte Folded Spill
+; RV64ZFH-NEXT:    lui a0, %hi(gh)
+; RV64ZFH-NEXT:    flh ft0, %lo(gh)(a0)
+; RV64ZFH-NEXT:    fcvt.s.h fa0, fa0
+; RV64ZFH-NEXT:    fcvt.s.h fs0, ft0
+; RV64ZFH-NEXT:    #APP
+; RV64ZFH-NEXT:    fadd.s ft0, fa0, fs0
+; RV64ZFH-NEXT:    #NO_APP
+; RV64ZFH-NEXT:    fcvt.h.s fa0, ft0
+; RV64ZFH-NEXT:    flw fs0, 12(sp) # 4-byte Folded Reload
+; RV64ZFH-NEXT:    addi sp, sp, 16
+; RV64ZFH-NEXT:    ret
+;
+; RV32DZFH-LABEL: constraint_f_half_abi_name:
+; RV32DZFH:       # %bb.0:
+; RV32DZFH-NEXT:    addi sp, sp, -16
+; RV32DZFH-NEXT:    fsd fs0, 8(sp) # 8-byte Folded Spill
+; RV32DZFH-NEXT:    lui a0, %hi(gh)
+; RV32DZFH-NEXT:    flh ft0, %lo(gh)(a0)
+; RV32DZFH-NEXT:    fcvt.d.h fa0, fa0
+; RV32DZFH-NEXT:    fcvt.d.h fs0, ft0
+; RV32DZFH-NEXT:    #APP
+; RV32DZFH-NEXT:    fadd.s ft0, fa0, fs0
+; RV32DZFH-NEXT:    #NO_APP
+; RV32DZFH-NEXT:    fcvt.h.d fa0, ft0
+; RV32DZFH-NEXT:    fld fs0, 8(sp) # 8-byte Folded Reload
+; RV32DZFH-NEXT:    addi sp, sp, 16
+; RV32DZFH-NEXT:    ret
+;
+; RV64DZFH-LABEL: constraint_f_half_abi_name:
+; RV64DZFH:       # %bb.0:
+; RV64DZFH-NEXT:    addi sp, sp, -16
+; RV64DZFH-NEXT:    fsd fs0, 8(sp) # 8-byte Folded Spill
+; RV64DZFH-NEXT:    lui a0, %hi(gh)
+; RV64DZFH-NEXT:    flh ft0, %lo(gh)(a0)
+; RV64DZFH-NEXT:    fcvt.d.h fa0, fa0
+; RV64DZFH-NEXT:    fcvt.d.h fs0, ft0
+; RV64DZFH-NEXT:    #APP
+; RV64DZFH-NEXT:    fadd.s ft0, fa0, fs0
+; RV64DZFH-NEXT:    #NO_APP
+; RV64DZFH-NEXT:    fcvt.h.d fa0, ft0
+; RV64DZFH-NEXT:    fld fs0, 8(sp) # 8-byte Folded Reload
+; RV64DZFH-NEXT:    addi sp, sp, 16
+; RV64DZFH-NEXT:    ret
+  %1 = load half, half* @gh
+  %2 = tail call half asm "fadd.s $0, $1, $2", "={ft0},{fa0},{fs0}"(half %a, half %1)
+  ret half %2
+}