* [PATCH, i386]: Fix PR90547, ICE in gen_lowpart_general
@ 2019-05-21 18:00 Uros Bizjak
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From: Uros Bizjak @ 2019-05-21 18:00 UTC (permalink / raw)
To: gcc-patches
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2019-05-21 Uroš Bizjak <ubizjak@gmail.com>
PR target/90547
* config/i386/i386.md (anddi_1 to andsi_1_zext splitter):
Avoid calling gen_lowpart with CONST operand.
testsuite/ChangeLog:
2019-05-21 Uroš Bizjak <ubizjak@gmail.com>
PR target/90547
* gcc.target/i386/pr90547.c: New test.
Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.
Committed to mainline SVN, patch will be backported to all release branches.
Uros.
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Index: config/i386/i386.md
===================================================================
--- config/i386/i386.md (revision 271467)
+++ config/i386/i386.md (working copy)
@@ -8525,6 +8525,14 @@
operands[2] = shallow_copy_rtx (operands[2]);
PUT_MODE (operands[2], SImode);
}
+ else if (GET_CODE (operands[2]) == CONST)
+ {
+ /* (const:DI (plus:DI (symbol_ref:DI ("...")) (const_int N))) */
+ operands[2] = copy_rtx (operands[2]);
+ PUT_MODE (operands[2], SImode);
+ PUT_MODE (XEXP (operands[2], 0), SImode);
+ PUT_MODE (XEXP (XEXP (operands[2], 0), 0), SImode);
+ }
else
operands[2] = gen_lowpart (SImode, operands[2]);
})
Index: testsuite/gcc.target/i386/pr90547.c
===================================================================
--- testsuite/gcc.target/i386/pr90547.c (nonexistent)
+++ testsuite/gcc.target/i386/pr90547.c (working copy)
@@ -0,0 +1,21 @@
+/* PR target/90547 */
+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+void
+foo ()
+{
+ void *g[] = {&&a, &&b};
+
+ for (unsigned c = 0x1F;; c >>= 1)
+ {
+ unsigned d = (long)("a"+1);
+ long e = 8;
+
+ while (e)
+ {
+ a: goto *g[c&d];
+ b: e--;
+ }
+ }
+}
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2019-05-21 18:00 [PATCH, i386]: Fix PR90547, ICE in gen_lowpart_general Uros Bizjak
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