From fbd50e867e6a782c7b56c9727bf7e1e74dae4b94 Mon Sep 17 00:00:00 2001
From: Peter Bergner <bergner@linux.ibm.com>
Date: Mon, 20 Mar 2023 09:12:47 -0500
Subject: [PATCH] rs6000: Don't ICE when compiling the __builtin_vec_xst_trunc
built-in [PR109178]
When we expand the __builtin_vec_xst_trunc built-in, we use the wrong mode
for the MEM operand which causes an unrecognizable insn ICE. The solution
is to use the correct TMODE mode.
2023-03-20 Peter Bergner <bergner@linux.ibm.com>
gcc/
PR target/109178
* config/rs6000/rs6000-builtin.cc (stv_expand_builtin): Use tmode.
gcc/testsuite/
PR target/109178
* gcc.target/powerpc/pr109178.c: New test.
---
gcc/config/rs6000/rs6000-builtin.cc | 2 +-
gcc/testsuite/gcc.target/powerpc/pr109178.c | 13 +++++++++++++
2 files changed, 14 insertions(+), 1 deletion(-)
create mode 100644 gcc/testsuite/gcc.target/powerpc/pr109178.c
diff --git a/gcc/config/rs6000/rs6000-builtin.cc b/gcc/config/rs6000/rs6000-builtin.cc
index 737a5c42bfb8..83c28cd8af32 100644
--- a/gcc/config/rs6000/rs6000-builtin.cc
+++ b/gcc/config/rs6000/rs6000-builtin.cc
@@ -2933,7 +2933,7 @@ stv_expand_builtin (insn_code icode, rtx *op,
rtx addr;
if (op[1] == const0_rtx)
- addr = gen_rtx_MEM (Pmode, op[2]);
+ addr = gen_rtx_MEM (tmode, op[2]);
else
{
op[1] = copy_to_mode_reg (Pmode, op[1]);
diff --git a/gcc/testsuite/gcc.target/powerpc/pr109178.c b/gcc/testsuite/gcc.target/powerpc/pr109178.c
new file mode 100644
index 000000000000..0f6e2d6b2eb4
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/pr109178.c
@@ -0,0 +1,13 @@
+/* PR target/109178 */
+/* { dg-require-effective-target int128 } */
+/* { dg-options "-O2 -mdejagnu-cpu=power10" } */
+
+/* Verify we do not ICE on the following. */
+
+typedef __attribute__ ((altivec (vector__))) signed __int128 v1ti_t;
+
+void
+foo (signed int *dst, v1ti_t src)
+{
+ __builtin_vec_xst_trunc(src, 0, dst);
+}
--
GitLab