[gcc r12-2922] Fix ICE.

[gcc r12-2922] Fix ICE.

[hongtao Liu]

https://gcc.gnu.org/g:1afcf5705a0becdca96111a6cb67670217c335b3

commit r12-2922-g1afcf5705a0becdca96111a6cb67670217c335b3
Author: liuhongt <hongtao.liu@intel.com>
Date:   Mon Aug 16 17:12:21 2021 +0800

    Fix ICE.
    
    gcc/ChangeLog:
    
            PR target/101930
            * config/i386/i386.md (ldexp<mode>3): Force operands[1] to
            reg.
    
    gcc/testsuite/ChangeLog:
    
            PR target/101930
            * gcc.target/i386/pr101930.c: New test.

Diff:
---
 gcc/config/i386/i386.md                  | 4 +---
 gcc/testsuite/gcc.target/i386/pr101930.c | 9 +++++++++
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index 4a8e8fea290..41d85623ad6 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -17938,9 +17938,7 @@
   if (TARGET_AVX512F && TARGET_SSE_MATH)
    {
      rtx op2 = gen_reg_rtx (<MODE>mode);
-
-     if (!nonimmediate_operand (operands[1], <MODE>mode))
-       operands[1] = force_reg (<MODE>mode, operands[1]);
+     operands[1] = force_reg (<MODE>mode, operands[1]);
 
      emit_insn (gen_floatsi<mode>2 (op2, operands[2]));
      emit_insn (gen_avx512f_scalef<mode>2 (operands[0], operands[1], op2));
diff --git a/gcc/testsuite/gcc.target/i386/pr101930.c b/gcc/testsuite/gcc.target/i386/pr101930.c
new file mode 100644
index 00000000000..7207dd18377
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr101930.c
@@ -0,0 +1,9 @@
+/* { dg-do compile } */
+/* { dg-options "-mavx512f -O2 -mfpmath=sse -ffast-math" } */
+double a;
+double
+__attribute__((noipa))
+foo (int b)
+{
+  return __builtin_ldexp (a, b);
+}