From: Segher Boessenkool <segher@kernel.crashing.org>
Date: Tue, 28 Jun 2016 05:56:41 +0000 (+0200)
Subject: rs6000: Fix split of ashdi3_extswsli_dot for memory (PR71670)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=a826405801ce4e28d534e3f693f236405d886caf;p=gcc.git

rs6000: Fix split of ashdi3_extswsli_dot for memory (PR71670)

The splitter for ashdi3_extswsli_dot for cr0 with memory uses emit_insn
gen_ashdi3_extswsli_dot, which does not work because that emits a scratch,
while the splitter runs after reload so there should be a real register
instead.  We can laboriously fix that up, or emit using
gen_ashdi3_extswsli_dot2 instead.  This patch does the latter.


	PR target/71670
	* config/rs6000/rs6000.md (ashdi3_extswsli_dot): Use
	gen_ashdi3_extswsli_dot2 instead of gen_ashdi3_extswsli_dot.

gcc/testsuite/
	PR target/71670
	* gcc.target/powerpc/pr71670.c: New testcase.

From-SVN: r237813
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 4c91c5f8522..6870078636e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2016-06-27  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	PR target/71670
+	* config/rs6000/rs6000.md (ashdi3_extswsli_dot): Use
+	gen_ashdi3_extswsli_dot2 instead of gen_ashdi3_extswsli_dot.
+
 2016-06-27  Pat Haugen  <pthaugen@us.ibm.com>
 
 	* config/rs6000/rs6000.md ('type' attribute): Add
diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index bb31e41e256..e8a6205df3a 100644
--- a/gcc/config/rs6000/rs6000.md
+++ b/gcc/config/rs6000/rs6000.md
@@ -4094,7 +4094,7 @@
 
   if (REGNO (cr) == CR0_REGNO)
     {
-      emit_insn (gen_ashdi3_extswsli_dot (dest, src2, shift, cr));
+      emit_insn (gen_ashdi3_extswsli_dot2 (dest, src2, shift, cr));
       DONE;
     }
 
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 7e7cf8b7e67..866cef796f3 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2016-06-27  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	PR target/71670
+	* gcc.target/powerpc/pr71670.c: New testcase.
+
 2016-06-27  Peter Bergner  <bergner@vnet.ibm.com>
 
 	PR target/71656
diff --git a/gcc/testsuite/gcc.target/powerpc/pr71670.c b/gcc/testsuite/gcc.target/powerpc/pr71670.c
new file mode 100644
index 00000000000..18fb62759d9
--- /dev/null
+++ b/gcc/testsuite/gcc.target/powerpc/pr71670.c
@@ -0,0 +1,7 @@
+/* { dg-do compile { target { powerpc*-*-* } } } */
+/* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power9" } } */
+/* { dg-options "-mcpu=power9 -O1" } */
+
+volatile int a;
+int b;
+void fn1(void) { b + (long)b || a; }