diff --git a/src/gallium/drivers/r300/compiler/r3xx_vertprog.c b/src/gallium/drivers/r300/compiler/r3xx_vertprog.c
index e8e3712bffc..ceb590ea085 100644
--- a/src/gallium/drivers/r300/compiler/r3xx_vertprog.c
+++ b/src/gallium/drivers/r300/compiler/r3xx_vertprog.c
@@ -878,7 +878,6 @@ void r3xx_compile_vertex_program(struct r300_vertex_program_compiler *c)
 	/* Lists of instruction transformations. */
 	struct radeon_program_transformation alu_rewrite_r500[] = {
 		{ &r300_transform_vertex_alu, NULL },
-		{ &r300_transform_trig_scale_vertex, NULL },
 		{ NULL, NULL }
 	};
 
diff --git a/src/gallium/drivers/r300/compiler/radeon_program_alu.c b/src/gallium/drivers/r300/compiler/radeon_program_alu.c
index c28cebce3a4..4f2c5081c62 100644
--- a/src/gallium/drivers/r300/compiler/radeon_program_alu.c
+++ b/src/gallium/drivers/r300/compiler/radeon_program_alu.c
@@ -1036,48 +1036,6 @@ int radeonTransformTrigScale(struct radeon_compiler* c,
 	return 1;
 }
 
-/**
- * Transform the trigonometric functions COS and SIN
- * so that the input to COS and SIN is always in the range [-PI, PI].
- */
-int r300_transform_trig_scale_vertex(struct radeon_compiler *c,
-	struct rc_instruction *inst,
-	void *unused)
-{
-	static const float cons[4] = {0.15915494309189535, 0.5, 6.28318530717959, -3.14159265358979};
-	unsigned int temp;
-	unsigned int constant;
-
-	if (inst->U.I.Opcode != RC_OPCODE_COS &&
-	    inst->U.I.Opcode != RC_OPCODE_SIN)
-		return 0;
-
-	if (!c->needs_trig_input_transform)
-		return 1;
-
-	/* Repeat x in the range [-PI, PI]:
-	 *
-	 *   repeat(x) = frac(x / 2PI + 0.5) * 2PI - PI
-	 */
-
-	temp = rc_find_free_temporary(c);
-	constant = rc_constants_add_immediate_vec4(&c->Program.Constants, cons);
-
-	emit3(c, inst->Prev, RC_OPCODE_MAD, NULL, dstregtmpmask(temp, RC_MASK_W),
-		swizzle_xxxx(inst->U.I.SrcReg[0]),
-		srcregswz(RC_FILE_CONSTANT, constant, RC_SWIZZLE_XXXX),
-		srcregswz(RC_FILE_CONSTANT, constant, RC_SWIZZLE_YYYY));
-	emit1(c, inst->Prev, RC_OPCODE_FRC, NULL, dstregtmpmask(temp, RC_MASK_W),
-		srcreg(RC_FILE_TEMPORARY, temp));
-	emit3(c, inst->Prev, RC_OPCODE_MAD, NULL, dstregtmpmask(temp, RC_MASK_W),
-		srcreg(RC_FILE_TEMPORARY, temp),
-		srcregswz(RC_FILE_CONSTANT, constant, RC_SWIZZLE_ZZZZ),
-		srcregswz(RC_FILE_CONSTANT, constant, RC_SWIZZLE_WWWW));
-
-	r300_transform_SIN_COS(c, inst, temp);
-	return 1;
-}
-
 /**
  * Replaces DDX/DDY instructions with MOV 0 to avoid using dummy shaders on r300/r400.
  *
diff --git a/src/gallium/drivers/r300/r300_vs.c b/src/gallium/drivers/r300/r300_vs.c
index dfa26de1c84..106d5520d41 100644
--- a/src/gallium/drivers/r300/r300_vs.c
+++ b/src/gallium/drivers/r300/r300_vs.c
@@ -201,7 +201,6 @@ void r300_translate_vertex_shader(struct r300_context *r300,
     compiler.Base.has_half_swizzles = FALSE;
     compiler.Base.has_presub = FALSE;
     compiler.Base.has_omod = FALSE;
-    compiler.Base.needs_trig_input_transform = DBG_ON(r300, DBG_USE_TGSI);
     compiler.Base.max_temp_regs = 32;
     compiler.Base.max_constants = 256;
     compiler.Base.max_alu_insts = r300->screen->caps.is_r500 ? 1024 : 256;