Mesa (android-radeonsi-build-fix): intel/compiler: Fix 'comparison is always true' warning
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Thu Dec 5 08:08:27 UTC 2019
Module: Mesa
Branch: android-radeonsi-build-fix
Commit: 668635abd26dda458f9293f99dd39f56431a4d61
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=668635abd26dda458f9293f99dd39f56431a4d61
Author: Ian Romanick <ian.d.romanick at intel.com>
Date: Mon Nov 18 19:16:23 2019 -0800
intel/compiler: Fix 'comparison is always true' warning
Without looking at the assembly or something, I'm not sure what the
compiler does here. The brw_reg_type enum is marked packed, so I'm
guess that it gets represented as a uint8_t. That's the only reason I
could think that comparing with -1 would be always true.
This patch adds the same cast that exists in brw_hw_type_to_reg_type.
It might be better to add a #define outside the enum for
BRW_REGISTER_TYPE_INVALID as (enum brw_reg_type)-1.
src/intel/compiler/brw_eu_compact.c: In function ‘has_immediate’:
src/intel/compiler/brw_eu_compact.c:1515:20: warning: comparison is always true due to limited range of data type [-Wtype-limits]
1515 | return *type != -1;
| ^~
src/intel/compiler/brw_eu_compact.c:1518:20: warning: comparison is always true due to limited range of data type [-Wtype-limits]
1518 | return *type != -1;
| ^~
Reviewed-by: Eric Engestrom <eric.engestrom at intel.com>
CID: 1455194
Fixes: 12d3b11908e ("intel/compiler: Add instruction compaction support on Gen12")
Cc: @mattst88
---
src/intel/compiler/brw_eu_compact.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/src/intel/compiler/brw_eu_compact.c b/src/intel/compiler/brw_eu_compact.c
index 9155da04c77..4d2e617b3ed 100644
--- a/src/intel/compiler/brw_eu_compact.c
+++ b/src/intel/compiler/brw_eu_compact.c
@@ -1512,10 +1512,10 @@ has_immediate(const struct gen_device_info *devinfo, const brw_inst *inst,
{
if (brw_inst_src0_reg_file(devinfo, inst) == BRW_IMMEDIATE_VALUE) {
*type = brw_inst_src0_type(devinfo, inst);
- return *type != -1;
+ return *type != (enum brw_reg_type)-1;
} else if (brw_inst_src1_reg_file(devinfo, inst) == BRW_IMMEDIATE_VALUE) {
*type = brw_inst_src1_type(devinfo, inst);
- return *type != -1;
+ return *type != (enum brw_reg_type)-1;
}
return false;
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