From e4e0f76d5c545faff67f2c51aa899989133f3512 Mon Sep 17 00:00:00 2001
From: SarahW <pcem@pcem-emulator.co.uk>
Date: Sun, 8 Jul 2018 16:36:26 +0100
Subject: [PATCH] De-duplicate ARM literal pools.

---
 src/codegen_backend_arm_uops.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/codegen_backend_arm_uops.c b/src/codegen_backend_arm_uops.c
index 8215caa..372044b 100644
--- a/src/codegen_backend_arm_uops.c
+++ b/src/codegen_backend_arm_uops.c
@@ -75,9 +75,18 @@ void codegen_reset_literal_pool(codeblock_t *block)
 
 int add_literal(codeblock_t *block, uint32_t data)
 {
+	int c;
+
 	if (literal_offset >= 4096)
 		fatal("add_literal - literal pool full\n");
 
+	/*Search for pre-existing value*/
+	for (c = 0; c < literal_offset; c += 4)
+	{
+		if (*(uint32_t *)&block->data[ARM_LITERAL_POOL_OFFSET + c] == data)
+			return c;
+	}
+
 	*(uint32_t *)&block->data[ARM_LITERAL_POOL_OFFSET + literal_offset] = data;
 
 	literal_offset += 4;