From b6b917847a25afbaba9983e80b62b69ed3ce3983 Mon Sep 17 00:00:00 2001
From: Lulu Cheng <chenglulu@loongson.cn>
Date: Thu, 4 Jul 2024 10:37:26 +0800
Subject: [PATCH 174/188] 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.
---
 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(-)
 create mode 100644 gcc/testsuite/gcc.target/loongarch/pr115752.c

diff --git a/gcc/config/loongarch/loongarch.cc b/gcc/config/loongarch/loongarch.cc
index 958e82b86..b78512e0e 100644
--- a/gcc/config/loongarch/loongarch.cc
+++ b/gcc/config/loongarch/loongarch.cc
@@ -6760,7 +6760,7 @@ 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 6743d2684..a23dabde1 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 \
-			 : 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 000000000..df4bae524
--- /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;
+}
-- 
2.43.0