amdgcn: Add padding to trampoline

ams-cs · ams-cs · commit b5a09a68bf0f · 2024-08-09T12:24:32.000Z
This avoids a -Wpadded warning (testcase gcc.dg/20050607-1.c).

gcc/ChangeLog:

	* config/gcn/gcn.cc (gcn_asm_trampoline_template): Add .align.
	* config/gcn/gcn.h (TRAMPOLINE_SIZE): Increase to 40.
diff --git a/gcc/config/gcn/gcn.cc b/gcc/config/gcn/gcn.cc
@@ -3794,6 +3794,7 @@ gcn_asm_trampoline_template (FILE *f)
   asm_fprintf (f, "\ts_mov_b32\ts%i, 0xffff\n", CC_SAVE_REG);
   asm_fprintf (f, "\ts_mov_b32\ts%i, 0xffff\n", CC_SAVE_REG + 1);
   asm_fprintf (f, "\ts_setpc_b64\ts[%i:%i]\n", CC_SAVE_REG, CC_SAVE_REG + 1);
+  asm_fprintf (f, "\t.align 8\n");
 }
 
 /* Implement TARGET_TRAMPOLINE_INIT.
diff --git a/gcc/config/gcn/gcn.h b/gcc/config/gcn/gcn.h
@@ -831,7 +831,7 @@ enum gcn_builtin_codes
 #define PROFILE_BEFORE_PROLOGUE 0
 
 /* Trampolines */
-#define TRAMPOLINE_SIZE 36
+#define TRAMPOLINE_SIZE 40  /* 36 + 4 padding for alignment.  */
 #define TRAMPOLINE_ALIGNMENT 64
 
 /* MD Optimization.

Original file line number	Diff line number	Diff line change
`@@ -3794,6 +3794,7 @@ gcn_asm_trampoline_template (FILE *f)`
`3794`	`3794`	`asm_fprintf (f, "\ts_mov_b32\ts%i, 0xffff\n", CC_SAVE_REG);`
`3795`	`3795`	`asm_fprintf (f, "\ts_mov_b32\ts%i, 0xffff\n", CC_SAVE_REG + 1);`
`3796`	`3796`	`asm_fprintf (f, "\ts_setpc_b64\ts[%i:%i]\n", CC_SAVE_REG, CC_SAVE_REG + 1);`
	`3797`	`+ asm_fprintf (f, "\t.align 8\n");`
`3797`	`3798`	`}`
`3798`	`3799`
`3799`	`3800`	`/* Implement TARGET_TRAMPOLINE_INIT.`