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libstdc++: Fix pool resource build errors for H8 [PR107801]

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The array of pool sizes was previously adjusted to work for msp430-elf
which has 16-bit int and either 16-bit size_t or 20-bit size_t. The
largest pool sizes were disabled unless size_t has more than 20 bits.

The H8 family has 16-bit int but 32-bit size_t, which means that the
largest sizes are enabled, but 1<<15 produces a negative number that
then cannot be narrowed to size_t.

Replace the test for 32-bit size_t with a test for 32-bit int, which
means we won't use the 4kiB to 4MiB pools for targets with 16-bit int
even if they have a wider size_t.

libstdc++-v3/ChangeLog:

	PR libstdc++/107801
	* src/c++17/memory_resource.cc (pool_sizes): Disable large pools
	for targets with 16-bit int.
This commit is contained in:
Jonathan Wakely 2022-11-22 09:53:36 +00:00
parent 09b7993ab6
commit 0f9659e770
1 changed files with 3 additions and 1 deletions
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4
libstdc++-v3/src/c++17/memory_resource.cc
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@ -873,9 +873,11 @@ namespace pmr
256, 320, 384, 448,
512, 768,
#if __SIZE_WIDTH__ > 16
// Use bigger pools if size_t has at least 20 bits.
1024, 1536,
2048, 3072,
#if __SIZE_WIDTH__ > 20
#if __INT_WIDTH__ >= 32
// Use even bigger pools if int has at least 32 bits.
1<<12, 1<<13, 1<<14,
1<<15, 1<<16, 1<<17,
1<<20, 1<<21, 1<<22 // 4MB should be enough for anybody