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| author | Richard Biener <rguenther@suse.de> | 2022-10-25 10:04:56 +0200 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2022-10-25 11:15:25 +0200 |
| commit | 3ee675724cb27eb2e8cfd82f6e234edc4a63f6be (patch) | |
| tree | d37923c459c58f4e436d9922a2761c6c44b71657 /gcc | |
| parent | d93171509aa7ca23148508b96f1c1f70b941d808 (diff) | |
| download | gcc-3ee675724cb27eb2e8cfd82f6e234edc4a63f6be.zip gcc-3ee675724cb27eb2e8cfd82f6e234edc4a63f6be.tar.gz gcc-3ee675724cb27eb2e8cfd82f6e234edc4a63f6be.tar.bz2 | |
Move NOP stripping in SCEV analysis
The following moves a pair of STRIP_USELESS_TYPE_CONVERSIONS to
where it belongs and adds a comment on why we handle GENERIC
there at all.
* tree-scalar-evolution.cc (follow_ssa_edge_expr): Move
STRIP_USELESS_TYPE_CONVERSIONS to where it matters.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/tree-scalar-evolution.cc | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/gcc/tree-scalar-evolution.cc b/gcc/tree-scalar-evolution.cc index 9f30f78..8b92709 100644 --- a/gcc/tree-scalar-evolution.cc +++ b/gcc/tree-scalar-evolution.cc @@ -1214,6 +1214,8 @@ tail_recurse: { code = TREE_CODE (expr); type = TREE_TYPE (expr); + /* Via follow_ssa_edge_inner_loop_phi we arrive here with the + GENERIC scalar evolution of the inner loop. */ switch (code) { CASE_CONVERT: @@ -1224,6 +1226,8 @@ tail_recurse: case MINUS_EXPR: rhs0 = TREE_OPERAND (expr, 0); rhs1 = TREE_OPERAND (expr, 1); + STRIP_USELESS_TYPE_CONVERSION (rhs0); + STRIP_USELESS_TYPE_CONVERSION (rhs1); break; default: rhs0 = expr; @@ -1260,8 +1264,6 @@ tail_recurse: case PLUS_EXPR: case MINUS_EXPR: /* This case is under the form "rhs0 +- rhs1". */ - STRIP_USELESS_TYPE_CONVERSION (rhs0); - STRIP_USELESS_TYPE_CONVERSION (rhs1); if (TREE_CODE (rhs0) == SSA_NAME && (TREE_CODE (rhs1) != SSA_NAME || code == MINUS_EXPR)) { |