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authorIan Lance Taylor <iant@golang.org>2020-12-15 21:52:23 -0800
committerIan Lance Taylor <iant@golang.org>2020-12-18 15:56:20 -0800
commit5128f8d0d99008d4f069bbaef9ee4372fe5da7ce (patch)
treea350c80e42f75a90a6ae1196c99486b14df5c1f9 /gcc/go/gofrontend
parent0e9f2b2dc8df91be27acc383c63f0feae28fa229 (diff)
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compiler: check for floating-point exponent overflow
Adjust mksysinfo and mkrsysinfo to strip out floating-point max numbers, as they can trigger this error. Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/278476
Diffstat (limited to 'gcc/go/gofrontend')
-rw-r--r--gcc/go/gofrontend/MERGE2
-rw-r--r--gcc/go/gofrontend/lex.cc4
2 files changed, 5 insertions, 1 deletions
diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index 6567db1..40242cc6 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-526037336231593939a517b7c0b2892d413adb40
+1317de50147304a226b3ec5c4d81376470c358e5
The first line of this file holds the git revision number of the last
merge done from the gofrontend repository.
diff --git a/gcc/go/gofrontend/lex.cc b/gcc/go/gofrontend/lex.cc
index e71b8cd..0baf4e4 100644
--- a/gcc/go/gofrontend/lex.cc
+++ b/gcc/go/gofrontend/lex.cc
@@ -1316,9 +1316,13 @@ Lex::gather_number()
}
}
+ mpfr_clear_overflow();
mpfr_t val;
int r = mpfr_init_set_str(val, num.c_str(), base, MPFR_RNDN);
go_assert(r == 0);
+ if (mpfr_overflow_p())
+ go_error_at(this->location(),
+ "floating-point exponent too large to represent");
bool is_imaginary = *p == 'i';
if (is_imaginary)