[libclc] Enable -fdiscard-value-names build flag to reduce bitcode size (#149016)

wenju-he · web-flow · commit 9d78eb5cc518 · 2025-07-17T08:04:33.000+08:00
The flag reduces nvptx64--nvidiacl.bc size from 10.6MB to 5.2MB.
diff --git a/libclc/CMakeLists.txt b/libclc/CMakeLists.txt
@@ -405,6 +405,7 @@ foreach( t ${LIBCLC_TARGETS_TO_BUILD} )
       -I${CMAKE_CURRENT_SOURCE_DIR}/clc/include
       # Error on undefined macros
       -Werror=undef
+      -fdiscard-value-names
     )
 
     if( NOT "${cpu}" STREQUAL "" )

Original file line number	Diff line number	Diff line change
`@@ -405,6 +405,7 @@ foreach( t ${LIBCLC_TARGETS_TO_BUILD} )`
`405`	`405`	`-I${CMAKE_CURRENT_SOURCE_DIR}/clc/include`
`406`	`406`	`# Error on undefined macros`
`407`	`407`	`-Werror=undef`
	`408`	`+ -fdiscard-value-names`
`408`	`409`	`)`
`409`	`410`
`410`	`411`	`if( NOT "${cpu}" STREQUAL "" )`