> Richard suggests that we implement the "obvious" transforms like
> inversion in the middle-end but if for example unsigned compares
> are not supported the us_minus + eq + negative trick isn't on
> that list.
>
> The main reason to restrict vec_cmp would be to avoid
> a <= b ? c : d going with an unsupported vec_cmp but instead
> do a > b ? d : c - the alternative is trying to fix this
> on the RTL side via combine. I understand the non-native
Yes, I have a patch which can fix most regressions via pattern match
in combine.
Still there is a situation that is difficult to deal with, mainly the
optimization w/o sse4.1 . Because pblendvb/blendvps/blendvpd only
exists under sse4.1, w/o sse4.1, it takes 3
instructions (pand,pandn,por) to simulate the vcond_mask, and the
combine matches up to 4 instructions, which makes it currently
impossible to use the combine to recover those optimizations in the
vcond{,u,eq}.i.e min/max.
In the case of sse 4.1 and above, there is basically no regression anymore.
the regression testcases w/o sse4.1
FAIL: g++.target/i386/pr100637-1b.C -std=gnu++14 scan-assembler-times pcmpeqb
2
FAIL: g++.target/i386/pr100637-1b.C -std=gnu++17 scan-assembler-times pcmpeqb
2
FAIL: g++.target/i386/pr100637-1b.C -std=gnu++20 scan-assembler-times pcmpeqb
2
FAIL: g++.target/i386/pr100637-1b.C -std=gnu++98 scan-assembler-times pcmpeqb
2
FAIL: g++.target/i386/pr100637-1w.C -std=gnu++14 scan-assembler-times pcmpeqw
2
FAIL: g++.target/i386/pr100637-1w.C -std=gnu++17 scan-assembler-times pcmpeqw
2
FAIL: g++.target/i386/pr100637-1w.C -std=gnu++20 scan-assembler-times pcmpeqw
2
FAIL: g++.target/i386/pr100637-1w.C -std=gnu++98 scan-assembler-times pcmpeqw
2
FAIL: g++.target/i386/pr103861-1.C -std=gnu++14 scan-assembler-times pcmpeqb 2
FAIL: g++.target/i386/pr103861-1.C -std=gnu++17 scan-assembler-times pcmpeqb 2
FAIL: g++.target/i386/pr103861-1.C -std=gnu++20 scan-assembler-times pcmpeqb 2
FAIL: g++.target/i386/pr103861-1.C -std=gnu++98 scan-assembler-times pcmpeqb 2
FAIL: gcc.target/i386/pr88540.c scan-assembler minpd
gcc/testsuite/ChangeLog:
PR target/115517
* g++.target/i386/pr100637-1b.C: Add xfail and -mno-sse4.1.
* g++.target/i386/pr100637-1w.C: Ditto.
* g++.target/i386/pr103861-1.C: Ditto.
* gcc.target/i386/pr88540.c: Ditto.
* gcc.target/i386/pr103941-2.c: Add -mno-avx512f.
* g++.target/i386/sse4_1-pr100637-1b.C: New test.
* g++.target/i386/sse4_1-pr100637-1w.C: New test.
* g++.target/i386/sse4_1-pr103861-1.C: New test.
* gcc.target/i386/sse4_1-pr88540.c: New test.
---
gcc/testsuite/g++.target/i386/pr100637-1b.C | 4 ++--
gcc/testsuite/g++.target/i386/pr100637-1w.C | 4 ++--
gcc/testsuite/g++.target/i386/pr103861-1.C | 4 ++--
.../g++.target/i386/sse4_1-pr100637-1b.C | 17 +++++++++++++++++
.../g++.target/i386/sse4_1-pr100637-1w.C | 17 +++++++++++++++++
.../g++.target/i386/sse4_1-pr103861-1.C | 17 +++++++++++++++++
gcc/testsuite/gcc.target/i386/pr103941-2.c | 2 +-
gcc/testsuite/gcc.target/i386/pr88540.c | 4 ++--
gcc/testsuite/gcc.target/i386/sse4_1-pr88540.c | 10 ++++++++++
9 files changed, 70 insertions(+), 9 deletions(-)
create mode 100644 gcc/testsuite/g++.target/i386/sse4_1-pr100637-1b.C
create mode 100644 gcc/testsuite/g++.target/i386/sse4_1-pr100637-1w.C
create mode 100644 gcc/testsuite/g++.target/i386/sse4_1-pr103861-1.C
create mode 100644 gcc/testsuite/gcc.target/i386/sse4_1-pr88540.c
diff --git a/gcc/testsuite/g++.target/i386/pr100637-1b.C
b/gcc/testsuite/g++.target/i386/pr100637-1b.C
index 35b5df7c9dd..dccb8f5e712 100644
--- a/gcc/testsuite/g++.target/i386/pr100637-1b.C
+++ b/gcc/testsuite/g++.target/i386/pr100637-1b.C
@@ -1,6 +1,6 @@
/* PR target/100637 */
/* { dg-do compile } */
-/* { dg-options "-O2 -msse2" } */
+/* { dg-options "-O2 -msse2 -mno-sse4.1" } */
typedef unsigned char __attribute__((__vector_size__ (4))) __v4qu;
typedef char __attribute__((__vector_size__ (4))) __v4qi;
@@ -13,5 +13,5 @@ __v4qu us (__v4qi a, __v4qi b) { return (a > b) ? au : bu; }
__v4qi su (__v4qu a, __v4qu b) { return (a > b) ? as : bs; }
__v4qi ss (__v4qi a, __v4qi b) { return (a > b) ? as : bs; }
-/* { dg-final { scan-assembler-times "pcmpeqb" 2 } } */
+/* { dg-final { scan-assembler-times "pcmpeqb" 2 { xfail *-*-* } } } */
/* { dg-final { scan-assembler-times "pcmpgtb" 2 } } */
diff --git a/gcc/testsuite/g++.target/i386/pr100637-1w.C
b/gcc/testsuite/g++.target/i386/pr100637-1w.C
index a3ed06fddee..a0aab62db33 100644
--- a/gcc/testsuite/g++.target/i386/pr100637-1w.C
+++ b/gcc/testsuite/g++.target/i386/pr100637-1w.C
@@ -1,6 +1,6 @@
/* PR target/100637 */
/* { dg-do compile } */
-/* { dg-options "-O2 -msse2" } */
+/* { dg-options "-O2 -msse2 -mno-sse4.1" } */
typedef unsigned short __attribute__((__vector_size__ (4))) __v2hu;
typedef short __attribute__((__vector_size__ (4))) __v2hi;
@@ -13,5 +13,5 @@ __v2hu us (__v2hi a, __v2hi b) { return (a > b) ? au : bu; }
__v2hi su (__v2hu a, __v2hu b) { return (a > b) ? as : bs; }
__v2hi ss (__v2hi a, __v2hi b) { return (a > b) ? as : bs; }
-/* { dg-final { scan-assembler-times "pcmpeqw" 2 } } */
+/* { dg-final { scan-assembler-times "pcmpeqw" 2 { xfail *-*-* } } } */
/* { dg-final { scan-assembler-times "pcmpgtw" 2 } } */
diff --git a/gcc/testsuite/g++.target/i386/pr103861-1.C
b/gcc/testsuite/g++.target/i386/pr103861-1.C
index 6475728991e..3b282a7dca2 100644
--- a/gcc/testsuite/g++.target/i386/pr103861-1.C
+++ b/gcc/testsuite/g++.target/i386/pr103861-1.C
@@ -1,6 +1,6 @@
/* PR target/103861 */
/* { dg-do compile } */
-/* { dg-options "-O2 -msse2" } */
+/* { dg-options "-O2 -msse2 -mno-sse4.1" } */
typedef unsigned char __attribute__((__vector_size__ (2))) __v2qu;
typedef char __attribute__((__vector_size__ (2))) __v2qi;
@@ -13,5 +13,5 @@ __v2qu us (__v2qi a, __v2qi b) { return (a > b) ? au : bu; }
__v2qi su (__v2qu a, __v2qu b) { return (a > b) ? as : bs; }
__v2qi ss (__v2qi a, __v2qi b) { return (a > b) ? as : bs; }
-/* { dg-final { scan-assembler-times "pcmpeqb" 2 } } */
+/* { dg-final { scan-assembler-times "pcmpeqb" 2 { xfail *-*-* } } } */
/* { dg-final { scan-assembler-times "pcmpgtb" 2 } } */
diff --git a/gcc/testsuite/g++.target/i386/sse4_1-pr100637-1b.C
b/gcc/testsuite/g++.target/i386/sse4_1-pr100637-1b.C
new file mode 100644
index 00000000000..3230a4ee563
--- /dev/null
+++ b/gcc/testsuite/g++.target/i386/sse4_1-pr100637-1b.C
@@ -0,0 +1,17 @@
+/* PR target/100637 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -msse4.1" } */
+
+typedef unsigned char __attribute__((__vector_size__ (4))) __v4qu;
+typedef char __attribute__((__vector_size__ (4))) __v4qi;
+
+__v4qu au, bu;
+__v4qi as, bs;
+
+__v4qu uu (__v4qu a, __v4qu b) { return (a > b) ? au : bu; }
+__v4qu us (__v4qi a, __v4qi b) { return (a > b) ? au : bu; }
+__v4qi su (__v4qu a, __v4qu b) { return (a > b) ? as : bs; }
+__v4qi ss (__v4qi a, __v4qi b) { return (a > b) ? as : bs; }
+
+/* { dg-final { scan-assembler-times "pcmpeqb" 2 } } */
+/* { dg-final { scan-assembler-times "pcmpgtb" 2 } } */
diff --git a/gcc/testsuite/g++.target/i386/sse4_1-pr100637-1w.C
b/gcc/testsuite/g++.target/i386/sse4_1-pr100637-1w.C
new file mode 100644
index 00000000000..9036ea5429d
--- /dev/null
+++ b/gcc/testsuite/g++.target/i386/sse4_1-pr100637-1w.C
@@ -0,0 +1,17 @@
+/* PR target/100637 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -msse4.1" } */
+
+typedef unsigned short __attribute__((__vector_size__ (4))) __v2hu;
+typedef short __attribute__((__vector_size__ (4))) __v2hi;
+
+__v2hu au, bu;
+__v2hi as, bs;
+
+__v2hu uu (__v2hu a, __v2hu b) { return (a > b) ? au : bu; }
+__v2hu us (__v2hi a, __v2hi b) { return (a > b) ? au : bu; }
+__v2hi su (__v2hu a, __v2hu b) { return (a > b) ? as : bs; }
+__v2hi ss (__v2hi a, __v2hi b) { return (a > b) ? as : bs; }
+
+/* { dg-final { scan-assembler-times "pcmpeqw" 2 } } */
+/* { dg-final { scan-assembler-times "pcmpgtw" 2 } } */
diff --git a/gcc/testsuite/g++.target/i386/sse4_1-pr103861-1.C
b/gcc/testsuite/g++.target/i386/sse4_1-pr103861-1.C
new file mode 100644
index 00000000000..a2b74898db9
--- /dev/null
+++ b/gcc/testsuite/g++.target/i386/sse4_1-pr103861-1.C
@@ -0,0 +1,17 @@
+/* PR target/103861 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -msse4.1" } */
+
+typedef unsigned char __attribute__((__vector_size__ (2))) __v2qu;
+typedef char __attribute__((__vector_size__ (2))) __v2qi;
+
+__v2qu au, bu;
+__v2qi as, bs;
+
+__v2qu uu (__v2qu a, __v2qu b) { return (a > b) ? au : bu; }
+__v2qu us (__v2qi a, __v2qi b) { return (a > b) ? au : bu; }
+__v2qi su (__v2qu a, __v2qu b) { return (a > b) ? as : bs; }
+__v2qi ss (__v2qi a, __v2qi b) { return (a > b) ? as : bs; }
+
+/* { dg-final { scan-assembler-times "pcmpeqb" 2 } } */
+/* { dg-final { scan-assembler-times "pcmpgtb" 2 } } */
diff --git a/gcc/testsuite/gcc.target/i386/pr103941-2.c
b/gcc/testsuite/gcc.target/i386/pr103941-2.c
index 972a32be997..9b24a10c63d 100644
--- a/gcc/testsuite/gcc.target/i386/pr103941-2.c
+++ b/gcc/testsuite/gcc.target/i386/pr103941-2.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-O2 -msse2" } */
+/* { dg-options "-O2 -msse2 -mno-avx512f" } */
void foo (int *c, float *x, float *y)
{
diff --git a/gcc/testsuite/gcc.target/i386/pr88540.c
b/gcc/testsuite/gcc.target/i386/pr88540.c
index b927d0c57d5..a22744763b5 100644
--- a/gcc/testsuite/gcc.target/i386/pr88540.c
+++ b/gcc/testsuite/gcc.target/i386/pr88540.c
@@ -1,5 +1,5 @@
/* { dg-do compile } */
-/* { dg-options "-O2 -msse2" } */
+/* { dg-options "-O2 -msse2 -mno-sse4.1" } */
void test(double* __restrict d1, double* __restrict d2, double* __restrict d3)
{
@@ -7,4 +7,4 @@ void test(double* __restrict d1, double* __restrict d2, double*
__restrict d3)
d3[n] = d1[n] < d2[n] ? d1[n] : d2[n];
}
-/* { dg-final { scan-assembler "minpd" } } */
+/* { dg-final { scan-assembler "minpd" { xfail *-*-* } } } */
diff --git a/gcc/testsuite/gcc.target/i386/sse4_1-pr88540.c
b/gcc/testsuite/gcc.target/i386/sse4_1-pr88540.c
new file mode 100644
index 00000000000..31565a69db5
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/sse4_1-pr88540.c
@@ -0,0 +1,10 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -msse4.1" } */
+
+void test(double* __restrict d1, double* __restrict d2, double* __restrict d3)
+{
+ for (int n = 0; n < 2; ++n)
+ d3[n] = d1[n] < d2[n] ? d1[n] : d2[n];
+}
+
+/* { dg-final { scan-assembler "minpd" } } */
--
2.31.1
