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re PR tree-optimization/93054 (ICE in gimple_set_lhs, at gimple.c:1820)

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2020-01-09  Richard Biener  <rguenther@suse.de>

	PR middle-end/93054
	* gimplify.c (gimplify_expr): Deal with NOP definitions.

	* gcc.dg/pr93054.c: New testcase.

From-SVN: r280039
This commit is contained in:
Richard Biener 2020-01-09 10:41:38 +00:00 committed by Richard Biener
parent 0f507a3657
commit 00294b189c
4 changed files with 22 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2020-01-09 Richard Biener <rguenther@suse.de>
PR middle-end/93054
* gimplify.c (gimplify_expr): Deal with NOP definitions.
2020-01-09 Richard Biener <rguenther@suse.de>
PR tree-optimization/93040

3
gcc/gimplify.c
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@ -14622,7 +14622,8 @@ gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p,
{
/* Avoid the extra copy if possible. */
*expr_p = create_tmp_reg (TREE_TYPE (name));
gimple_set_lhs (SSA_NAME_DEF_STMT (name), *expr_p);
if (!gimple_nop_p (SSA_NAME_DEF_STMT (name)))
gimple_set_lhs (SSA_NAME_DEF_STMT (name), *expr_p);
release_ssa_name (name);
}
}

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2020-01-09 Richard Biener <rguenther@suse.de>
PR middle-end/93054
* gcc.dg/pr93054.c: New testcase.
2020-01-09 Richard Biener <rguenther@suse.de>
PR tree-optimization/93040

10
gcc/testsuite/gcc.dg/pr93054.c Normal file
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@ -0,0 +1,10 @@
/* { dg-do compile } */
__attribute__ ((returns_twice)) int
bp (int);
__attribute__ ((noreturn)) int
cb (void)
{
return bp (cb ()); /* { dg-warning "declared .noreturn." } */
}