[PATCH] i386: Handle V4HI and V2SImode in ix86_widen_mult_cost [PR109807]

[Uros Bizjak via Gcc-patches]

Do not crash when asking ix86_widen_mult_cost for the cost of
a widening mul operation to V4HI or V2SImode.

gcc/ChangeLog:

    PR target/109807
    * config/i386/i386.cc (ix86_widen_mult_cost):
    Handle V4HImode and V2SImode.

gcc/testsuite/ChangeLog:

    PR target/109807
    * gcc.target/i386/pr109807.c: New test.

Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.

Pushed to master.

Uros.

diff --git a/gcc/config/i386/i386.cc b/gcc/config/i386/i386.cc
index b1d08ecdb3d..62fe06fdbaa 100644
--- a/gcc/config/i386/i386.cc
+++ b/gcc/config/i386/i386.cc
@@ -20417,12 +20417,14 @@ ix86_widen_mult_cost (const struct processor_costs 
*cost,
   int basic_cost = 0;
   switch (mode)
     {
+    case V4HImode:
     case V8HImode:
     case V16HImode:
       if (!uns_p || mode == V16HImode)
        extra_cost = cost->sse_op * 2;
       basic_cost = cost->mulss * 2 + cost->sse_op * 4;
       break;
+    case V2SImode:
     case V4SImode:
     case V8SImode:
       /* pmulhw/pmullw can be used.  */
diff --git a/gcc/testsuite/gcc.target/i386/pr109807.c 
b/gcc/testsuite/gcc.target/i386/pr109807.c
new file mode 100644
index 00000000000..6380eb35312
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr109807.c
@@ -0,0 +1,4 @@
+/* { dg-do compile { target { ! ia32 } } } */
+/* { dg-options "-O2 -msse4" } */
+
+#include "sse2-mmx-pmaddwd.c"