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re PR tree-optimization/90838 (Detect table-based ctz implementation)

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PR tree-optimization/90838
	* tree-ssa-forwprop.c (simplify_count_trailing_zeroes): Use
	SCALAR_INT_TYPE_MODE instead of TYPE_MODE as operand of
	CTZ_DEFINED_VALUE_AT_ZERO.

From-SVN: r280140
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Jakub Jelinek 2020-01-10 22:10:03 +01:00 committed by Jakub Jelinek
parent a29a9962ea
commit 974bb8a4dc
2 changed files with 9 additions and 1 deletions
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gcc/ChangeLog
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@ -1,3 +1,10 @@
2020-01-10 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/90838
* tree-ssa-forwprop.c (simplify_count_trailing_zeroes): Use
SCALAR_INT_TYPE_MODE instead of TYPE_MODE as operand of
CTZ_DEFINED_VALUE_AT_ZERO.
2020-01-10 Vladimir Makarov <vmakarov@redhat.com>
PR inline-asm/93027

3
gcc/tree-ssa-forwprop.c
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@ -1922,7 +1922,8 @@ simplify_count_trailing_zeroes (gimple_stmt_iterator *gsi)
tree type = TREE_TYPE (res_ops[0]);
HOST_WIDE_INT ctzval;
HOST_WIDE_INT type_size = tree_to_shwi (TYPE_SIZE (type));
bool zero_ok = CTZ_DEFINED_VALUE_AT_ZERO (TYPE_MODE (type), ctzval) == 2;
scalar_int_mode mode = SCALAR_INT_TYPE_MODE (type);
bool zero_ok = CTZ_DEFINED_VALUE_AT_ZERO (mode, ctzval) == 2;
/* Skip if there is no value defined at zero, or if we can't easily
return the correct value for zero. */