Hi!
José, any objection to me pushing the attached
"BPF, nvptx: Standardize on 'sorry, unimplemented: dynamic stack allocation not
supported'"?
(Why this is useful, you'll understand later today.)
I've tested BPF as follows:
$ [...]/configure --target=bpf-none
$ make -j12 all-gcc
$ make check-gcc-c RUNTESTFLAGS=bpf.exp
The before vs. after 'diff' of 'gcc/testsuite/gcc/gcc.log' looks as
expected:
[...]
Executing on host: [...]/xgcc -B[...]/
[...]/gcc.target/bpf/diag-alloca-1.c -fdiagnostics-plain-output -ansi
-pedantic-errors -S -o diag-alloca-1.s (timeout = 300)
spawn -ignore SIGHUP [...]/xgcc -B[...]/
[...]/gcc.target/bpf/diag-alloca-1.c -fdiagnostics-plain-output -ansi
-pedantic-errors -S -o diag-alloca-1.s
[...]/gcc.target/bpf/diag-alloca-1.c: In function 'foo':
-[...]/gcc.target/bpf/diag-alloca-1.c:6:12: error: BPF does not support
dynamic stack allocation
+[...]/gcc.target/bpf/diag-alloca-1.c:6:12: sorry, unimplemented: dynamic
stack allocation not supported
compiler exited with status 1
-PASS: gcc.target/bpf/diag-alloca-1.c (test for errors, line 6)
+PASS: gcc.target/bpf/diag-alloca-1.c at line 7 (test for warnings, line 6)
PASS: gcc.target/bpf/diag-alloca-1.c (test for excess errors)
Executing on host: [...]/xgcc -B[...]/
[...]/gcc.target/bpf/diag-alloca-2.c -fdiagnostics-plain-output -std=gnu89
-S -o diag-alloca-2.s (timeout = 300)
spawn -ignore SIGHUP [...]/xgcc -B[...]/
[...]/gcc.target/bpf/diag-alloca-2.c -fdiagnostics-plain-output -std=gnu89 -S
-o diag-alloca-2.s
[...]/gcc.target/bpf/diag-alloca-2.c: In function 'foo':
-[...]/gcc.target/bpf/diag-alloca-2.c:7:7: error: BPF does not support
dynamic stack allocation
+[...]/gcc.target/bpf/diag-alloca-2.c:7:7: sorry, unimplemented: dynamic
stack allocation not supported
compiler exited with status 1
-PASS: gcc.target/bpf/diag-alloca-2.c (test for errors, line 7)
+PASS: gcc.target/bpf/diag-alloca-2.c at line 8 (test for warnings, line 7)
PASS: gcc.target/bpf/diag-alloca-2.c (test for excess errors)
[...]
(No further testing done for BPF.)
Grüße
Thomas
>From 8ebac3064696c6d42041e398ebb5a622498523cc Mon Sep 17 00:00:00 2001
From: Thomas Schwinge <tschwi...@baylibre.com>
Date: Fri, 21 Feb 2025 11:21:08 +0100
Subject: [PATCH] BPF, nvptx: Standardize on 'sorry, unimplemented: dynamic
stack allocation not supported'
... instead of BPF: 'error: BPF does not support dynamic stack allocation', and
nvptx: 'sorry, unimplemented: target cannot support alloca'.
gcc/
* config/bpf/bpf.md (define_expand "allocate_stack"): Emit
'sorry, unimplemented: dynamic stack allocation not supported'.
* config/nvptx/nvptx.md (define_expand "allocate_stack")
[!TARGET_SOFT_STACK && !(TARGET_PTX_7_3 && TARGET_SM52)]: Likewise.
gcc/testsuite/
* gcc.target/bpf/diag-alloca-1.c: Adjust 'dg-message'.
* gcc.target/bpf/diag-alloca-2.c: Likewise.
* gcc.target/nvptx/alloca-1-sm_30.c: Likewise.
* gcc.target/nvptx/vla-1-sm_30.c: Likewise.
* lib/target-supports.exp (proc check_effective_target_alloca):
Adjust comment.
---
gcc/config/bpf/bpf.md | 5 ++---
gcc/config/nvptx/nvptx.md | 2 +-
gcc/testsuite/gcc.target/bpf/diag-alloca-1.c | 3 ++-
gcc/testsuite/gcc.target/bpf/diag-alloca-2.c | 4 +++-
gcc/testsuite/gcc.target/nvptx/alloca-1-sm_30.c | 2 +-
gcc/testsuite/gcc.target/nvptx/vla-1-sm_30.c | 2 +-
gcc/testsuite/lib/target-supports.exp | 2 +-
7 files changed, 11 insertions(+), 9 deletions(-)
diff --git a/gcc/config/bpf/bpf.md b/gcc/config/bpf/bpf.md
index 12cf9fae855..91d94838e39 100644
--- a/gcc/config/bpf/bpf.md
+++ b/gcc/config/bpf/bpf.md
@@ -121,12 +121,11 @@
[(match_operand:DI 0 "general_operand" "")
(match_operand:DI 1 "general_operand" "")]
""
- "
{
- error (\"BPF does not support dynamic stack allocation\");
+ sorry ("dynamic stack allocation not supported");
emit_insn (gen_nop ());
DONE;
-}")
+})
;;;; Arithmetic/Logical
diff --git a/gcc/config/nvptx/nvptx.md b/gcc/config/nvptx/nvptx.md
index 532812bcf70..dc19695d040 100644
--- a/gcc/config/nvptx/nvptx.md
+++ b/gcc/config/nvptx/nvptx.md
@@ -1723,7 +1723,7 @@
emit_insn (gen_nvptx_alloca (Pmode, operands[0], operands[1]));
else if (!TARGET_SOFT_STACK)
{
- sorry ("target cannot support alloca");
+ sorry ("dynamic stack allocation not supported");
emit_insn (gen_nop ());
}
else if (TARGET_SOFT_STACK)
diff --git a/gcc/testsuite/gcc.target/bpf/diag-alloca-1.c b/gcc/testsuite/gcc.target/bpf/diag-alloca-1.c
index 0406f2c3595..e549cab84ca 100644
--- a/gcc/testsuite/gcc.target/bpf/diag-alloca-1.c
+++ b/gcc/testsuite/gcc.target/bpf/diag-alloca-1.c
@@ -3,7 +3,8 @@
int
foo (int x)
{
- int *p = __builtin_alloca (x); /* { dg-error "support" } */
+ int *p = __builtin_alloca (x);
+ /* { dg-message {sorry, unimplemented: dynamic stack allocation not supported} {} { target *-*-* } .-1 } */
return p[2];
}
diff --git a/gcc/testsuite/gcc.target/bpf/diag-alloca-2.c b/gcc/testsuite/gcc.target/bpf/diag-alloca-2.c
index ef7170b2c3d..b1084bf5726 100644
--- a/gcc/testsuite/gcc.target/bpf/diag-alloca-2.c
+++ b/gcc/testsuite/gcc.target/bpf/diag-alloca-2.c
@@ -4,6 +4,8 @@
int
foo (int x)
{
- int arr[x]; /* { dg-error "support" } */
+ int arr[x];
+ /* { dg-message {sorry, unimplemented: dynamic stack allocation not supported} {} { target *-*-* } .-1 } */
+
return arr[3];
}
diff --git a/gcc/testsuite/gcc.target/nvptx/alloca-1-sm_30.c b/gcc/testsuite/gcc.target/nvptx/alloca-1-sm_30.c
index 261a603ec4c..5538751035b 100644
--- a/gcc/testsuite/gcc.target/nvptx/alloca-1-sm_30.c
+++ b/gcc/testsuite/gcc.target/nvptx/alloca-1-sm_30.c
@@ -7,5 +7,5 @@ void sink(void *);
void f(void)
{
sink(__builtin_alloca(123));
- /* { dg-message {sorry, unimplemented: target cannot support alloca} {} { target *-*-* } .-1 } */
+ /* { dg-message {sorry, unimplemented: dynamic stack allocation not supported} {} { target *-*-* } .-1 } */
}
diff --git a/gcc/testsuite/gcc.target/nvptx/vla-1-sm_30.c b/gcc/testsuite/gcc.target/nvptx/vla-1-sm_30.c
index 2bf2c91d60e..7c2d2e0e35b 100644
--- a/gcc/testsuite/gcc.target/nvptx/vla-1-sm_30.c
+++ b/gcc/testsuite/gcc.target/nvptx/vla-1-sm_30.c
@@ -7,6 +7,6 @@ void sink(void *);
void f(int s)
{
char a[s];
- /* { dg-message {sorry, unimplemented: target cannot support alloca} {} { target *-*-* } .-1 } */
+ /* { dg-message {sorry, unimplemented: dynamic stack allocation not supported} {} { target *-*-* } .-1 } */
sink(a);
}
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 47564a400e6..9346bb3e03c 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -990,7 +990,7 @@ proc check_effective_target_untyped_assembly {} {
return 1
}
-# Return 1 if alloca is supported, 0 otherwise.
+# Return 1 if dynamic stack allocation is supported, 0 otherwise.
proc check_effective_target_alloca {} {
if { [istarget bpf-*-*] } {
--
2.34.1
