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| author | Ben Elliston <bje@au.ibm.com> | 2006-02-19 23:09:26 +0000 |
|---|---|---|
| committer | Ben Elliston <bje@gcc.gnu.org> | 2006-02-20 10:09:26 +1100 |
| commit | 9c603f8f1ea0910836a42a0f6d0207626d8bcbef (patch) | |
| tree | 49ba00a8b562fe93892d125035f4bf622b896353 /gcc/doc | |
| parent | 3d8504ac3262976d2c63d547a07aef0874f530b6 (diff) | |
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* doc/tree-ssa.texi (Interfaces): Describe low vs. high GIMPLE.
From-SVN: r111286
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/tree-ssa.texi | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/doc/tree-ssa.texi b/gcc/doc/tree-ssa.texi index 77a2f0a..ef2bb8a 100644 --- a/gcc/doc/tree-ssa.texi +++ b/gcc/doc/tree-ssa.texi @@ -132,6 +132,11 @@ convert the front end trees to GIMPLE@. Usually such a hook will involve much of the same code for expanding front end trees to RTL@. This function can return fully lowered GIMPLE, or it can return GENERIC trees and let the main gimplifier lower them the rest of the way; this is often simpler. +GIMPLE that is not fully lowered is known as ``high GIMPLE'' and +consists of the IL before the pass @code{pass_lower_cf}. High GIMPLE +still contains lexical scopes and nested expressions, while low GIMPLE +exposes all of the implicit jumps for control expressions like +@code{COND_EXPR}. The C and C++ front ends currently convert directly from front end trees to GIMPLE, and hand that off to the back end rather than first |