[GHC] #15188: Catch cases where both branches of an if jump to the same block.
#15188: Catch cases where both branches of an if jump to the same block. -------------------------------------+------------------------------------- Reporter: AndreasK | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.2.2 (CodeGen) | Keywords: CodeGen | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- For one reason or the other sometimes we end up with if statements in Cmm where both branch targets are the same: Actual example from NoFib: {{{ u9oL: if (_c9oA::P64 != 5) goto u9p2; else goto u9p2; }}} Which eventually results in this code: {{{ _u9oL: cmpq $5,%rbx jne _u9p2 <- utterly pointless _u9p2: addq $16,%rbp jmp _c9iq }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15188 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#15188: Catch cases where both branches of an if jump to the same block. -------------------------------------+------------------------------------- Reporter: AndreasK | Owner: AndreasK Type: bug | Status: new Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.2.2 (CodeGen) | Resolution: | Keywords: CodeGen Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by AndreasK): * cc: jmct (added) * owner: (none) => AndreasK -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15188#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#15188: Catch cases where both branches of an if jump to the same block. -------------------------------------+------------------------------------- Reporter: AndreasK | Owner: AndreasK Type: bug | Status: patch Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.2.2 (CodeGen) | Resolution: | Keywords: CodeGen Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by AndreasK): * status: new => patch -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15188#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#15188: Catch cases where both branches of an if jump to the same block. -------------------------------------+------------------------------------- Reporter: AndreasK | Owner: AndreasK Type: bug | Status: patch Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.2.2 (CodeGen) | Resolution: | Keywords: CodeGen Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4740 Wiki Page: | -------------------------------------+------------------------------------- Changes (by AndreasK): * differential: => Phab:D4740 -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15188#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#15188: Catch cases where both branches of an if jump to the same block.
-------------------------------------+-------------------------------------
Reporter: AndreasK | Owner: AndreasK
Type: bug | Status: patch
Priority: normal | Milestone: 8.6.1
Component: Compiler | Version: 8.2.2
(CodeGen) |
Resolution: | Keywords: CodeGen
Operating System: Unknown/Multiple | Architecture:
| Unknown/Multiple
Type of failure: None/Unknown | Test Case:
Blocked By: | Blocking:
Related Tickets: | Differential Rev(s): Phab:D4740
Wiki Page: |
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Comment (by Ben Gamari
#15188: Catch cases where both branches of an if jump to the same block. -------------------------------------+------------------------------------- Reporter: AndreasK | Owner: AndreasK Type: bug | Status: closed Priority: normal | Milestone: 8.6.1 Component: Compiler | Version: 8.2.2 (CodeGen) | Resolution: fixed | Keywords: CodeGen Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4740 Wiki Page: | -------------------------------------+------------------------------------- Changes (by bgamari): * status: patch => closed * resolution: => fixed -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15188#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
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