gcc/

	Backport from trunk r246682.
	2017-04-04  Thomas Preud'homme  <thomas.preudhomme@arm.com>

	PR target/80307
	* config/arm/arm.c (thumb1_rtx_costs): Give a cost of 32
	instructions for small multiply cores.

	gcc/testsuite/
	Backport from trunk r246682.
	2017-04-04  Thomas Preud'homme  <thomas.preudhomme@arm.com>

	PR target/80307
	* gcc.target/arm/small-multiply-m0-1.c: Do not skip test if not
	targeting any CPU or architecture.
	* gcc.target/arm/small-multiply-m0-2.c: Likewise.
	* gcc.target/arm/small-multiply-m0-3.c: Likewise.
	* gcc.target/arm/small-multiply-m0plus-1.c: Likewise.
	* gcc.target/arm/small-multiply-m0plus-2.c: Likewise.
	* gcc.target/arm/small-multiply-m0plus-3.c: Likewise.
	* gcc.target/arm/small-multiply-m1-1.c: Likewise.
	* gcc.target/arm/small-multiply-m1-2.c: Likewise.
	* gcc.target/arm/small-multiply-m1-3.c: Likewise.

Change-Id: I6916d48a0f747ff2efe0b907a966e5b7638c1c85

10 files changed, 12 insertions, 9 deletions

diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c
index 10897264227..fe1ffe1e0b0 100644
--- a/gcc/config/arm/arm.c
+++ b/gcc/config/arm/arm.c
@@ -8557,6 +8557,9 @@ thumb1_rtx_costs (rtx x, enum rtx_code code, enum rtx_code outer)
       return COSTS_N_INSNS (1);
 
     case MULT:
+      if (arm_arch6m && arm_m_profile_small_mul)
+	return COSTS_N_INSNS (32);
+
       if (CONST_INT_P (XEXP (x, 1)))
 	{
 	  int cycles = 0;
diff --git a/gcc/testsuite/gcc.target/arm/small-multiply-m0-1.c b/gcc/testsuite/gcc.target/arm/small-multiply-m0-1.c
index 49132e3e83d..52c652c1cba 100644
--- a/gcc/testsuite/gcc.target/arm/small-multiply-m0-1.c
+++ b/gcc/testsuite/gcc.target/arm/small-multiply-m0-1.c
@@ -1,6 +1,6 @@
 /* { dg-do compile } */
 /* { dg-require-effective-target arm_thumb1_ok } */
-/* { dg-skip-if "Test is specific to cortex-m0.small-multiply" { arm*-*-* } { "*" } { "-mcpu=cortex-m0.small-multiply" } } */
+/* { dg-skip-if "do not override -mcpu" { *-*-* } { "-mcpu=*" "-march=*" } { "-mcpu=cortex-m0.small-multiply" } } */
 /* { dg-options "-mcpu=cortex-m0.small-multiply -mthumb -O2" } */
 
 int
diff --git a/gcc/testsuite/gcc.target/arm/small-multiply-m0-2.c b/gcc/testsuite/gcc.target/arm/small-multiply-m0-2.c
index 7f1bf7bd604..10d49e9eace 100644
--- a/gcc/testsuite/gcc.target/arm/small-multiply-m0-2.c
+++ b/gcc/testsuite/gcc.target/arm/small-multiply-m0-2.c
@@ -1,6 +1,6 @@
 /* { dg-do compile } */
 /* { dg-require-effective-target arm_thumb1_ok } */
-/* { dg-skip-if "Test is specific to cortex-m0.small-multiply" { arm*-*-* } { "*" } { "-mcpu=cortex-m0.small-multiply" } } */
+/* { dg-skip-if "do not override -mcpu" { *-*-* } { "-mcpu=*" "-march=*" } { "-mcpu=cortex-m0.small-multiply" } } */
 /* { dg-options "-mcpu=cortex-m0.small-multiply -mthumb -Os" } */
 
 int
diff --git a/gcc/testsuite/gcc.target/arm/small-multiply-m0-3.c b/gcc/testsuite/gcc.target/arm/small-multiply-m0-3.c
index aca39d746dc..b4af511af86 100644
--- a/gcc/testsuite/gcc.target/arm/small-multiply-m0-3.c
+++ b/gcc/testsuite/gcc.target/arm/small-multiply-m0-3.c
@@ -1,6 +1,6 @@
 /* { dg-do compile } */
 /* { dg-require-effective-target arm_thumb1_ok } */
-/* { dg-skip-if "Test is specific to cortex-m0.small-multiply" { arm*-*-* } { "*" } { "-mcpu=cortex-m0.small-multiply" } } */
+/* { dg-skip-if "do not override -mcpu" { *-*-* } { "-mcpu=*" "-march=*" } { "-mcpu=cortex-m0.small-multiply" } } */
 /* { dg-options "-mcpu=cortex-m0.small-multiply -mthumb -Os" } */
 
 int
diff --git a/gcc/testsuite/gcc.target/arm/small-multiply-m0plus-1.c b/gcc/testsuite/gcc.target/arm/small-multiply-m0plus-1.c
index 12e8839753c..59dba7cf4ab 100644
--- a/gcc/testsuite/gcc.target/arm/small-multiply-m0plus-1.c
+++ b/gcc/testsuite/gcc.target/arm/small-multiply-m0plus-1.c
@@ -1,6 +1,6 @@
 /* { dg-do compile } */
 /* { dg-require-effective-target arm_thumb1_ok } */
-/* { dg-skip-if "Test is specific to cortex-m0plus.small-multiply" { arm*-*-* } { "*" } { "-mcpu=cortex-m0plus.small-multiply" } } */
+/* { dg-skip-if "do not override -mcpu" { *-*-* } { "-mcpu=*" "-march=*" } { "-mcpu=cortex-m0plus.small-multiply" } } */
 /* { dg-options "-mcpu=cortex-m0plus.small-multiply -mthumb -O2" } */
 
 int
diff --git a/gcc/testsuite/gcc.target/arm/small-multiply-m0plus-2.c b/gcc/testsuite/gcc.target/arm/small-multiply-m0plus-2.c
index 3e3c9b26e3c..685ef440776 100644
--- a/gcc/testsuite/gcc.target/arm/small-multiply-m0plus-2.c
+++ b/gcc/testsuite/gcc.target/arm/small-multiply-m0plus-2.c
@@ -1,6 +1,6 @@
 /* { dg-do compile } */
 /* { dg-require-effective-target arm_thumb1_ok } */
-/* { dg-skip-if "Test is specific to cortex-m0plus.small-multiply" { arm*-*-* } { "*" } { "-mcpu=cortex-m0plus.small-multiply" } } */
+/* { dg-skip-if "do not override -mcpu" { *-*-* } { "-mcpu=*" "-march=*" } { "-mcpu=cortex-m0plus.small-multiply" } } */
 /* { dg-options "-mcpu=cortex-m0plus.small-multiply -mthumb -Os" } */
 
 int
diff --git a/gcc/testsuite/gcc.target/arm/small-multiply-m0plus-3.c b/gcc/testsuite/gcc.target/arm/small-multiply-m0plus-3.c
index 75e34321ec2..d24e720fe67 100644
--- a/gcc/testsuite/gcc.target/arm/small-multiply-m0plus-3.c
+++ b/gcc/testsuite/gcc.target/arm/small-multiply-m0plus-3.c
@@ -1,6 +1,6 @@
 /* { dg-do compile } */
 /* { dg-require-effective-target arm_thumb1_ok } */
-/* { dg-skip-if "Test is specific to cortex-m0plus.small-multiply" { arm*-*-* } { "*" } { "-mcpu=cortex-m0plus.small-multiply" } } */
+/* { dg-skip-if "do not override -mcpu" { *-*-* } { "-mcpu=*" "-march=*" } { "-mcpu=cortex-m0plus.small-multiply" } } */
 /* { dg-options "-mcpu=cortex-m0plus.small-multiply -mthumb -Os" } */
 
 int
diff --git a/gcc/testsuite/gcc.target/arm/small-multiply-m1-1.c b/gcc/testsuite/gcc.target/arm/small-multiply-m1-1.c
index fbe90cc4a54..d966ae955ce 100644
--- a/gcc/testsuite/gcc.target/arm/small-multiply-m1-1.c
+++ b/gcc/testsuite/gcc.target/arm/small-multiply-m1-1.c
@@ -1,6 +1,6 @@
 /* { dg-do compile } */
 /* { dg-require-effective-target arm_thumb1_ok } */
-/* { dg-skip-if "Test is specific to cortex-m1.small-multiply" { arm*-*-* } { "*" } { "-mcpu=cortex-m1.small-multiply" } } */
+/* { dg-skip-if "do not override -mcpu" { *-*-* } { "-mcpu=*" "-march=*" } { "-mcpu=cortex-m1.small-multiply" } } */
 /* { dg-options "-mcpu=cortex-m1.small-multiply -mthumb -O2" } */
 
 int
diff --git a/gcc/testsuite/gcc.target/arm/small-multiply-m1-2.c b/gcc/testsuite/gcc.target/arm/small-multiply-m1-2.c
index 6fca40564ee..60576bb9ed1 100644
--- a/gcc/testsuite/gcc.target/arm/small-multiply-m1-2.c
+++ b/gcc/testsuite/gcc.target/arm/small-multiply-m1-2.c
@@ -1,6 +1,6 @@
 /* { dg-do compile } */
 /* { dg-require-effective-target arm_thumb1_ok } */
-/* { dg-skip-if "Test is specific to cortex-m1.small-multiply" { arm*-*-* } { "*" } { "-mcpu=cortex-m1.small-multiply" } } */
+/* { dg-skip-if "do not override -mcpu" { *-*-* } { "-mcpu=*" "-march=*" } { "-mcpu=cortex-m1.small-multiply" } } */
 /* { dg-options "-mcpu=cortex-m1.small-multiply -mthumb -Os" } */
 
 int
diff --git a/gcc/testsuite/gcc.target/arm/small-multiply-m1-3.c b/gcc/testsuite/gcc.target/arm/small-multiply-m1-3.c
index bc732c32346..c56479d1897 100644
--- a/gcc/testsuite/gcc.target/arm/small-multiply-m1-3.c
+++ b/gcc/testsuite/gcc.target/arm/small-multiply-m1-3.c
@@ -1,6 +1,6 @@
 /* { dg-do compile } */
 /* { dg-require-effective-target arm_thumb1_ok } */
-/* { dg-skip-if "Test is specific to cortex-m1.small-multiply" { arm*-*-* } { "*" } { "-mcpu=cortex-m1.small-multiply" } } */
+/* { dg-skip-if "do not override -mcpu" { *-*-* } { "-mcpu=*" "-march=*" } { "-mcpu=cortex-m1.small-multiply" } } */
 /* { dg-options "-mcpu=cortex-m1.small-multiply -mthumb -Os" } */
 
 int