[gcc r13-3874] i386: Fix up ix86_expand_int_sse_cmp [PR107585]

[gcc r13-3874] i386: Fix up ix86_expand_int_sse_cmp [PR107585]

[Jakub Jelinek]

https://gcc.gnu.org/g:49de156a6adb50e0624479f22c20141cadef812d

commit r13-3874-g49de156a6adb50e0624479f22c20141cadef812d
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Thu Nov 10 11:46:52 2022 +0100

    i386: Fix up ix86_expand_int_sse_cmp [PR107585]
    
    The following patch fixes ICE on the testcase.  I've used GEN_INT
    incorrectly thinking the code punts on the problematic boundaries.
    It does, but only for LE and GE, i.e. signed comparisons, for unsigned
    the boundaries are 0 and unsigned maximum, so when say unsigned char
    adds one to 127 or subtracts one from 128 we need to canonicalize it.
    
    2022-11-10  Jakub Jelinek  <jakub@redhat.com>
    
            PR target/107585
            PR target/107546
            * config/i386/i386-expand.cc (ix86_expand_int_sse_cmp): Use
            gen_int_mode rather than GEN_INT.
    
            * gcc.dg/pr107585.c: New test.

Diff:
---
 gcc/config/i386/i386-expand.cc  |  6 ++++--
 gcc/testsuite/gcc.dg/pr107585.c | 13 +++++++++++++
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/gcc/config/i386/i386-expand.cc b/gcc/config/i386/i386-expand.cc
index 9c92b07d5cd..acf9e00d490 100644
--- a/gcc/config/i386/i386-expand.cc
+++ b/gcc/config/i386/i386-expand.cc
@@ -4540,7 +4540,8 @@ ix86_expand_int_sse_cmp (rtx dest, enum rtx_code code, rtx cop0, rtx cop1,
 		  rtvec v = rtvec_alloc (n_elts);
 		  for (i = 0; i < n_elts; ++i)
 		    RTVEC_ELT (v, i)
-		      = GEN_INT (INTVAL (CONST_VECTOR_ELT (cop1, i)) + 1);
+		      = gen_int_mode (INTVAL (CONST_VECTOR_ELT (cop1, i)) + 1,
+				      eltmode);
 		  cop1 = gen_rtx_CONST_VECTOR (mode, v);
 		  std::swap (cop0, cop1);
 		  code = code == LE ? GT : GTU;
@@ -4584,7 +4585,8 @@ ix86_expand_int_sse_cmp (rtx dest, enum rtx_code code, rtx cop0, rtx cop1,
 		  rtvec v = rtvec_alloc (n_elts);
 		  for (i = 0; i < n_elts; ++i)
 		    RTVEC_ELT (v, i)
-		      = GEN_INT (INTVAL (CONST_VECTOR_ELT (cop1, i)) - 1);
+		      = gen_int_mode (INTVAL (CONST_VECTOR_ELT (cop1, i)) - 1,
+				      eltmode);
 		  cop1 = gen_rtx_CONST_VECTOR (mode, v);
 		  code = code == GE ? GT : GTU;
 		  break;
diff --git a/gcc/testsuite/gcc.dg/pr107585.c b/gcc/testsuite/gcc.dg/pr107585.c
new file mode 100644
index 00000000000..820e04b6537
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr107585.c
@@ -0,0 +1,13 @@
+/* PR target/107585 */
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+typedef unsigned char __attribute__((__vector_size__ (16))) V;
+char c;
+void bar (int);
+
+void
+foo (void)
+{
+  bar (((V) (c <= (V){127}))[2]);
+}