[PATCH v4 04/10] testsuite: Add check for overflowed IMEM region to testsuite

[Dimitar Dimitrov]

PRU architecture supports maximum 256k program memory (IMEM). Some GCC
test cases manage to produce executables bigger than that.

gcc/testsuite/ChangeLog:

2018-08-29  Dimitar Dimitrov  <dimi...@dinux.eu>

        * lib/gcc-dg.exp: Bail on region overflow for tiny targets.
        * lib/target-utils.exp: Ditto.
        * lib/target-supports.exp: Declare PRU target as tiny.

Signed-off-by: Dimitar Dimitrov <dimi...@dinux.eu>
---
 gcc/testsuite/lib/gcc-dg.exp          | 5 +++++
 gcc/testsuite/lib/target-supports.exp | 5 +++++
 gcc/testsuite/lib/target-utils.exp    | 4 ++++
 3 files changed, 14 insertions(+)

diff --git a/gcc/testsuite/lib/gcc-dg.exp b/gcc/testsuite/lib/gcc-dg.exp
index 24d0b00d25d..7ef9de59dc2 100644
--- a/gcc/testsuite/lib/gcc-dg.exp
+++ b/gcc/testsuite/lib/gcc-dg.exp
@@ -394,6 +394,11 @@ proc gcc-dg-prune { system text } {
         return "::unsupported::memory full"
     }
 
+    if { [regexp "(^|\n)\[^\n\]*: region \[^\n\]* overflowed" $text] 
+          && [check_effective_target_tiny] } {
+       return "::unsupported::memory full"
+    }
+
     # Likewise, if we see ".text exceeds local store range" or
     # similar.
     if {[string match "spu-*" $system] && \
diff --git a/gcc/testsuite/lib/target-supports.exp 
b/gcc/testsuite/lib/target-supports.exp
index ce89f618349..7d4ea35babb 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -8843,6 +8843,11 @@ proc check_effective_target_tiny {} {
              && [check_effective_target_avr_tiny] } {
          set et_target_tiny_saved 1
        }
+       # PRU Program Counter is 16-bits, and trampolines are not supported.
+       # Hence directly declare as a tiny target.
+       if [istarget pru-*-*] {
+         set et_target_tiny_saved 1
+       }
     }
 
     return $et_target_tiny_saved
diff --git a/gcc/testsuite/lib/target-utils.exp 
b/gcc/testsuite/lib/target-utils.exp
index bd39cc5bc79..732a1827a02 100644
--- a/gcc/testsuite/lib/target-utils.exp
+++ b/gcc/testsuite/lib/target-utils.exp
@@ -35,6 +35,10 @@ proc ${tool}_check_unsupported_p { output } {
           && [check_effective_target_tiny] } {
         return "memory full"
      }
+    if { [regexp "(^|\n)\[^\n\]*: region \[^\n\]* overflowed" $output]
+          && [check_effective_target_tiny] } {
+       return "memory full"
+    }
 
     if { [istarget spu-*-*] && \
             [string match "*exceeds local store*" $output] } {
-- 
2.11.0