53 lines
1.5 KiB
Diff
53 lines
1.5 KiB
Diff
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--- a/gcc/haifa-sched.c 2021-03-08 14:46:59.204000000 +0800
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+++ b/gcc/haifa-sched.c 2021-03-09 13:32:40.656000000 +0800
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@@ -2036,8 +2036,10 @@ model_start_update_pressure (struct mode
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/* The instruction wasn't part of the model schedule; it was moved
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from a different block. Update the pressure for the end of
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the model schedule. */
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- MODEL_REF_PRESSURE (group, point, pci) += delta;
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- MODEL_MAX_PRESSURE (group, point, pci) += delta;
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+ if (MODEL_REF_PRESSURE (group, point, pci) != -1 || delta > 0)
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+ MODEL_REF_PRESSURE (group, point, pci) += delta;
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+ if (MODEL_MAX_PRESSURE (group, point, pci) != -1 || delta > 0)
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+ MODEL_MAX_PRESSURE (group, point, pci) += delta;
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}
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else
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{
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diff -uprN a/gcc/testsuite/gcc.dg/sche1-pressure-check.c b/gcc/testsuite/gcc.dg/sche1-pressure-check.c
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--- a/gcc/testsuite/gcc.dg/sche1-pressure-check.c 1970-01-01 08:00:00.000000000 +0800
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+++ b/gcc/testsuite/gcc.dg/sche1-pressure-check.c 2021-03-09 13:40:34.036000000 +0800
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@@ -0,0 +1,33 @@
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+/* { dg-do compile } */
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+/* { dg-options "-O3" } */
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+
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+int a, g, h;
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+char b, c;
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+short d;
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+static int e;
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+int *volatile f;
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+void i() {
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+ int j = 0;
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+ int *k = &a;
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+ for (; c; c--) {
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+ g && (d = 0);
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+ j ^= 10;
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+ {
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+ int l[2];
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+ l;
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+ h = l[1];
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+ }
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+ e = 1;
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+ for (; e <= 7; e++) {
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+ *k = 6;
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+ *f = b = 0;
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+ for (; b <= 7; b++) {
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+ int m = 5;
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+ if (g)
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+ *k &= m ^= j;
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+ }
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+ }
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+ }
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+}
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+int main() {}
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+
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