[gcc r15-1986] LoongArch: TFmode is not allowed to be stored in the float register.

[LuluCheng via Gcc-cvs]

https://gcc.gnu.org/g:abeb6c8a62758faa0719e818e6e8a7db15a6793b

commit r15-1986-gabeb6c8a62758faa0719e818e6e8a7db15a6793b
Author: Lulu Cheng <chengl...@loongson.cn>
Date:   Thu Jul 4 10:37:26 2024 +0800

    LoongArch: TFmode is not allowed to be stored in the float register.
    
            PR target/115752
    
    gcc/ChangeLog:
    
            * config/loongarch/loongarch.cc
            (loongarch_hard_regno_mode_ok_uncached): Replace
            UNITS_PER_FPVALUE with UNITS_PER_HWFPVALUE.
            * config/loongarch/loongarch.h (UNITS_PER_FPVALUE): Delete.
    
    gcc/testsuite/ChangeLog:
    
            * gcc.target/loongarch/pr115752.c: New test.

Diff:
---
 gcc/config/loongarch/loongarch.cc             | 2 +-
 gcc/config/loongarch/loongarch.h              | 7 -------
 gcc/testsuite/gcc.target/loongarch/pr115752.c | 8 ++++++++
 3 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/gcc/config/loongarch/loongarch.cc 
b/gcc/config/loongarch/loongarch.cc
index 27f3dbdfb1a0..5d894a36b4d4 100644
--- a/gcc/config/loongarch/loongarch.cc
+++ b/gcc/config/loongarch/loongarch.cc
@@ -6763,7 +6763,7 @@ loongarch_hard_regno_mode_ok_uncached (unsigned int 
regno, machine_mode mode)
       if (mclass == MODE_FLOAT
          || mclass == MODE_COMPLEX_FLOAT
          || mclass == MODE_VECTOR_FLOAT)
-       return size <= UNITS_PER_FPVALUE;
+       return size <= UNITS_PER_HWFPVALUE;
 
       /* Allow integer modes that fit into a single register.  We need
         to put integers into FPRs when using instructions like CVT
diff --git a/gcc/config/loongarch/loongarch.h b/gcc/config/loongarch/loongarch.h
index b9323aba3948..5efeae53be6b 100644
--- a/gcc/config/loongarch/loongarch.h
+++ b/gcc/config/loongarch/loongarch.h
@@ -146,13 +146,6 @@ along with GCC; see the file COPYING3.  If not see
 #define UNITS_PER_HWFPVALUE \
   (TARGET_SOFT_FLOAT ? 0 : UNITS_PER_FP_REG)
 
-/* The largest size of value that can be held in floating-point
-   registers.  */
-#define UNITS_PER_FPVALUE \
-  (TARGET_SOFT_FLOAT ? 0 \
-   : TARGET_SINGLE_FLOAT ? UNITS_PER_FP_REG \
-                        : LA_LONG_DOUBLE_TYPE_SIZE / BITS_PER_UNIT)
-
 /* The number of bytes in a double.  */
 #define UNITS_PER_DOUBLE (TYPE_PRECISION (double_type_node) / BITS_PER_UNIT)
 
diff --git a/gcc/testsuite/gcc.target/loongarch/pr115752.c 
b/gcc/testsuite/gcc.target/loongarch/pr115752.c
new file mode 100644
index 000000000000..df4bae524f75
--- /dev/null
+++ b/gcc/testsuite/gcc.target/loongarch/pr115752.c
@@ -0,0 +1,8 @@
+/* { dg-do compile } */
+
+long double
+test (long double xx)
+{
+   __asm ("" :: "f"(xx)); /* { dg-error "inconsistent operand constraints in 
an 'asm'" } */
+   return xx + 1;
+}