[PATCH 3/4] configure: Build with -Wtype-limits.

[Henri Verbeet]

From: Henri Verbeet

libs/vkd3d-shader/tpf.c: In function ‘write_sm4_unary_op_with_two_destinations’:
libs/vkd3d-shader/tpf.c:4489:24: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
     assert(1 - dst_idx >= 0);
                        ^~
libs/vkd3d-shader/tpf.c: In function ‘write_sm4_binary_op_with_two_destinations’:
libs/vkd3d-shader/tpf.c:4549:24: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits]
     assert(1 - dst_idx >= 0);
                        ^~
---
 configure.ac            | 1 +
 libs/vkd3d-shader/tpf.c | 6 ++----
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/configure.ac b/configure.ac
index 6d352895f..e2376b0d6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -67,6 +67,7 @@ AS_IF([test "x${GCC}" = "xyes"],
       VKD3D_CHECK_CFLAGS([-Wpointer-arith])
       VKD3D_CHECK_CFLAGS([-Wshadow])
       VKD3D_CHECK_CFLAGS([-Wshift-overflow=2])
+      VKD3D_CHECK_CFLAGS([-Wtype-limits])
       VKD3D_CHECK_CFLAGS([-Wunused-but-set-parameter])
       VKD3D_CHECK_CFLAGS([-Wvla])
       VKD3D_CHECK_CFLAGS([-Wl,--no-undefined])])
diff --git a/libs/vkd3d-shader/tpf.c b/libs/vkd3d-shader/tpf.c
index 10dde9852..c6cf1c951 100644
--- a/libs/vkd3d-shader/tpf.c
+++ b/libs/vkd3d-shader/tpf.c
@@ -4477,7 +4477,7 @@ static void write_sm4_unary_op(const struct tpf_writer *tpf, enum vkd3d_sm4_opco
 }

static void write_sm4_unary_op_with_two_destinations(const struct tpf_writer *tpf, enum vkd3d_sm4_opcode opcode,
-        const struct hlsl_ir_node *dst, unsigned dst_idx, const struct hlsl_ir_node *src)
+        const struct hlsl_ir_node *dst, unsigned int dst_idx, const struct hlsl_ir_node *src)
 {
     struct sm4_instruction instr;

@@ -4486,7 +4486,6 @@ static void write_sm4_unary_op_with_two_destinations(const struct tpf_writer *tp

assert(dst_idx < ARRAY_SIZE(instr.dsts));
     sm4_dst_from_node(&instr.dsts[dst_idx], dst);
-    assert(1 - dst_idx >= 0);
     instr.dsts[1 - dst_idx].reg.type = VKD3DSPR_NULL;
     instr.dsts[1 - dst_idx].reg.dimension = VSIR_DIMENSION_NONE;
     instr.dsts[1 - dst_idx].reg.idx_count = 0;
@@ -4536,7 +4535,7 @@ static void write_sm4_binary_op_dot(const struct tpf_writer *tpf, enum vkd3d_sm4
 }

static void write_sm4_binary_op_with_two_destinations(const struct tpf_writer *tpf,
-        enum vkd3d_sm4_opcode opcode, const struct hlsl_ir_node *dst, unsigned dst_idx,
+        enum vkd3d_sm4_opcode opcode, const struct hlsl_ir_node *dst, unsigned int dst_idx,
         const struct hlsl_ir_node *src1, const struct hlsl_ir_node *src2)
 {
     struct sm4_instruction instr;
@@ -4546,7 +4545,6 @@ static void write_sm4_binary_op_with_two_destinations(const struct tpf_writer *t

assert(dst_idx < ARRAY_SIZE(instr.dsts));
     sm4_dst_from_node(&instr.dsts[dst_idx], dst);
-    assert(1 - dst_idx >= 0);
     instr.dsts[1 - dst_idx].reg.type = VKD3DSPR_NULL;
     instr.dsts[1 - dst_idx].reg.dimension = VSIR_DIMENSION_NONE;
     instr.dsts[1 - dst_idx].reg.idx_count = 0;