[GHC] #8887: Double double assignment in optimized Cmm on SPARC
#8887: Double double assignment in optimized Cmm on SPARC ----------------------------+-------------------------------------------- Reporter: kgardas | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.6.3 Keywords: | Operating System: Solaris Architecture: sparc | Type of failure: Runtime performance bug Difficulty: Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | ----------------------------+-------------------------------------------- Hello, while reading ffi003 asm/opt-cmm for fixing this on SPARC I've noticed this code, this is optimized Cmm dump: {{{ 112 c1or: 113 _s1nw::F64 = F64[_s1nv::P32 + 3]; 114 _c1oj::I32 = sin; 115 _c1ok::F64 = _s1nw::F64; }}} this assignment to _s1nw::F64 looks useless as we may assign directly to _c1ok::F64, may we not? Both optimized and non-optimized Cmms attached. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8887 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#8887: Double double assignment in optimized Cmm on SPARC --------------------------------------------+--------------------------- Reporter: kgardas | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.9 Resolution: | Keywords: Operating System: Solaris | Architecture: sparc Type of failure: Runtime performance bug | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: --------------------------------------------+--------------------------- Changes (by kgardas): * version: 7.6.3 => 7.9 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8887#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#8887: Double double assignment in optimized Cmm on SPARC -------------------------------------+------------------------------------- Reporter: kgardas | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.9 (CodeGen) | Keywords: Resolution: | Architecture: sparc Operating System: Solaris | Difficulty: Unknown Type of failure: Runtime | Blocked By: performance bug | Related Tickets: Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Changes (by thomie): * cc: simonmar (added) * component: Compiler => Compiler (CodeGen) -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8887#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#8887: Double double assignment in optimized Cmm on SPARC -------------------------------------+------------------------------------- Reporter: kgardas | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.9 (CodeGen) | Resolution: | Keywords: CodeGen Operating System: Solaris | Architecture: sparc Type of failure: Runtime | Test Case: performance bug | Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by simonpj): * keywords: => CodeGen -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/8887#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
participants (1)
-
GHC