Currently we simplify multiplication by 1 but nothing
for the similar divide by 1.
This patch add the missing simplification together with
its test cases.
Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@xxxxxxxxx>
---
simplify.c | 1 +
validation/optim/muldiv-by-one.c | 3 +++
2 files changed, 4 insertions(+)
diff --git a/simplify.c b/simplify.c
index b242b64d6..91021dbb1 100644
--- a/simplify.c
+++ b/simplify.c
@@ -348,6 +348,7 @@ static int simplify_constant_rightside(struct instruction *insn)
case OP_ASR:
return simplify_asr(insn, insn->src1, value);
+ case OP_DIVU: case OP_DIVS:
case OP_MULU: case OP_MULS:
return simplify_mul_div(insn, value);
diff --git a/validation/optim/muldiv-by-one.c b/validation/optim/muldiv-by-one.c
index ac8ac95b2..f6dd7cb2c 100644
--- a/validation/optim/muldiv-by-one.c
+++ b/validation/optim/muldiv-by-one.c
@@ -3,6 +3,8 @@ typedef int si;
si smul1(si a) { return a * 1; }
ui umul1(ui a) { return a * 1; }
+si sdiv1(si a) { return a / 1; }
+ui udiv1(ui a) { return a / 1; }
/*
* check-name: muldiv-by-one
@@ -10,4 +12,5 @@ ui umul1(ui a) { return a * 1; }
* check-output-ignore
*
* check-output-excludes: mul[us]\\.
+ * check-output-excludes: div[us]\\.
*/
--
2.11.0
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