aarch64: Fix another bug in aarch64_add_offset_1 [PR94121]

> I'm getting this ICE with -mabi=ilp32:
>
> during RTL pass: fwprop1
> /opt/gcc/gcc-20200312/gcc/testsuite/gcc.dg/pr94121.c: In function 'bar':
> /opt/gcc/gcc-20200312/gcc/testsuite/gcc.dg/pr94121.c:16:1: internal compiler error: in decompose, at rtl.h:2279

That is a preexisting issue, caused by another bug in the same function.
When mode is SImode and moffset is 0x80000000 (or anything else with the
bit 31 set), we need to sign-extend it.

2020-03-13  Jakub Jelinek  <jakub@redhat.com>

	PR target/94121
	* config/aarch64/aarch64.c (aarch64_add_offset_1): Use gen_int_mode
	instead of GEN_INT.

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 25abfcf..448c1e1 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2020-03-13  Jakub Jelinek  <jakub@redhat.com>
+
+       PR target/94121
+       * config/aarch64/aarch64.c (aarch64_add_offset_1): Use gen_int_mode
+       instead of GEN_INT.
+
 2020-03-13  H.J. Lu  <hongjiu.lu@intel.com>
 
        PR target/89229

diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index 2c81f86..b0cbb6e 100644 (file)
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -3757,7 +3757,8 @@ aarch64_add_offset_1 (scalar_int_mode mode, rtx dest,
   if (emit_move_imm)
     {
       gcc_assert (temp1 != NULL_RTX || can_create_pseudo_p ());
-      temp1 = aarch64_force_temporary (mode, temp1, GEN_INT (moffset));
+      temp1 = aarch64_force_temporary (mode, temp1,
+                                      gen_int_mode (moffset, mode));
     }
   insn = emit_insn (offset < 0
                    ? gen_sub3_insn (dest, src, temp1)