[Bug 92709] "LLVM triggered Diagnostic Handler: unsupported call to function ldexpf in main" when starting race in stuntrally

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92709

            Bug ID: 92709
           Summary: "LLVM triggered Diagnostic Handler: unsupported call
                    to function ldexpf in main" when starting race in
                    stuntrally
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: haagch at frickel.club
        QA Contact: dri-devel at lists.freedesktop.org

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Wimbledon XT [Radeon HD 7970M] (rev ff)

llvm-svn 251500 (but happened at least since 251005)
mesa git
stuntrally 2.6

Here is a trace (167 mb compressed):
http://haagch.frickel.club/files/stuntrally.trace.xz
It replays fine on intel, but produces said exception on radeonsi:

[...]
LLVM triggered Diagnostic Handler: unsupported call to function ldexpf in main
apitrace: warning: caught signal 11
601245: error: caught an unhandled exception
glretrace+0x23c99c
/usr/lib/libpthread.so.0+0x10d5f
/usr/lib/libLLVM.so.3.8+0xa96976
/usr/lib/libLLVM.so.3.8:
_ZNK4llvm14TargetLowering11LowerCallToERNS0_16CallLoweringInfoE+0x1406
/usr/lib/libLLVM.so.3.8:
_ZN4llvm19SelectionDAGBuilder14lowerInvokableERNS_14TargetLowering16CallLoweringInfoEPKNS_10BasicBlockE+0x38b
/usr/lib/libLLVM.so.3.8:
_ZN4llvm19SelectionDAGBuilder11LowerCallToENS_17ImmutableCallSiteENS_7SDValueEbPKNS_10BasicBlockE+0x62e
/usr/lib/libLLVM.so.3.8:
_ZN4llvm19SelectionDAGBuilder9visitCallERKNS_8CallInstE+0x9f
/usr/lib/libLLVM.so.3.8:
_ZN4llvm19SelectionDAGBuilder5visitERKNS_11InstructionE+0x33
/usr/lib/libLLVM.so.3.8:
_ZN4llvm16SelectionDAGISel16SelectBasicBlockENS_14ilist_iteratorIKNS_11InstructionEEES4_Rb+0x37
/usr/lib/libLLVM.so.3.8:
_ZN4llvm16SelectionDAGISel20SelectAllBasicBlocksERKNS_8FunctionE+0x38f
/usr/lib/libLLVM.so.3.8:
_ZN4llvm16SelectionDAGISel20runOnMachineFunctionERNS_15MachineFunctionE+0x471
/usr/lib/libLLVM.so.3.8:
_ZN4llvm13FPPassManager13runOnFunctionERNS_8FunctionE+0x289
/usr/lib/libLLVM.so.3.8: _ZN4llvm13FPPassManager11runOnModuleERNS_6ModuleE+0x2a
/usr/lib/libLLVM.so.3.8:
_ZN4llvm6legacy15PassManagerImpl3runERNS_6ModuleE+0x300
/usr/lib/libLLVM.so.3.8+0x1205e7e
/usr/lib/libLLVM.so.3.8: LLVMTargetMachineEmitToMemoryBuffer+0xa8
/usr/lib/xorg/modules/dri/radeonsi_dri.so+0x591aaf
/usr/lib/xorg/modules/dri/radeonsi_dri.so+0x50f0ea
/usr/lib/xorg/modules/dri/radeonsi_dri.so+0x50fe37
/usr/lib/xorg/modules/dri/radeonsi_dri.so+0x51a894
/usr/lib/xorg/modules/dri/radeonsi_dri.so+0x51b405
/usr/lib/xorg/modules/dri/radeonsi_dri.so+0x517ade
/usr/lib/xorg/modules/dri/radeonsi_dri.so+0x3a4e16
/usr/lib/xorg/modules/dri/radeonsi_dri.so+0x1fe042
/usr/lib/xorg/modules/dri/radeonsi_dri.so+0x1cd399
glretrace+0xd51c9
glretrace+0xbd1c
glretrace+0xc37b
glretrace+0x7b04
/usr/lib/libc.so.6: __libc_start_main+0xef
glretrace: _start+0x28

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