search for: win_alloca

...FR64:%vreg192 %vreg193<def> = MOVSDrm <fi#0>, 1, %noreg, 24, %noreg; mem:LD8[%89] FR64:%vreg193 %vreg194<def> = MOVSDrm <fi#0>, 1, %noreg, 80, %noreg; mem:LD8[%94] FR64:%vreg194 %vreg195<def> = MOV32ri 8; GR32:%vreg195 %EAX<def> = COPY %vreg195; GR32:%vreg195 WIN_ALLOCA %EAX<imp-def,dead>, %ESP<imp-def,dead>, %EFLAGS<imp-def,dead>, %ESP<imp-use> %vreg196<def> = COPY %ESP; GR32:%vreg196 MOV32mr %vreg196, 1, %noreg, 0, %noreg, %vreg16; mem:ST4[%114] GR32:%vreg196,%vreg16 %vreg197<def> = MOV32ri 72; GR32:%vreg197 %EAX<def>...

...93<def> = MOVSDrm <fi#0>, 1, %noreg, 24, %noreg; mem:LD8[%89] FR64:%vreg193 > %vreg194<def> = MOVSDrm <fi#0>, 1, %noreg, 80, %noreg; mem:LD8[%94] FR64:%vreg194 > %vreg195<def> = MOV32ri 8; GR32:%vreg195 > %EAX<def> = COPY %vreg195; GR32:%vreg195 > WIN_ALLOCA %EAX<imp-def,dead>, %ESP<imp-def,dead>, %EFLAGS<imp-def,dead>, %ESP<imp-use> > %vreg196<def> = COPY %ESP; GR32:%vreg196 > MOV32mr %vreg196, 1, %noreg, 0, %noreg, %vreg16; mem:ST4[%114] GR32:%vreg196,%vreg16 > %vreg197<def> = MOV32ri 72; GR32:%vreg197...

...ing to implement this by: a. Custom lowering DYNAMIC_ALLOCA in case segmented stacks are enabled. b. Creating a X86ISD::SEG_ALLOCA node in LowerDYNAMIC_STACKALLOC if segmented stacks are enabled. (Right now all LowerDYNAMIC_STACKALLOC on x86 does is check for Windows and lower the call to X86ISD::WIN_ALLOCA). c. Having EmitLoweredSegAlloca do the checks, (calling the external function if needed) and, in both the cases, write the pointer to the allocated memory to RAX. If the function is called nothing extra needs to be done, since the return value stays at RAX. If the stack pointer was changed, I do...

...t; > a. Custom lowering DYNAMIC_ALLOCA in case segmented stacks are enabled. > > b. Creating a X86ISD::SEG_ALLOCA node in LowerDYNAMIC_STACKALLOC if > segmented stacks are enabled. (Right now all LowerDYNAMIC_STACKALLOC on > x86 does is check for Windows and lower the call to X86ISD::WIN_ALLOCA). > > c. Having EmitLoweredSegAlloca do the checks, (calling the external > function if needed) and, in both the cases, write the pointer to the > allocated memory to RAX. If the function is called nothing extra needs > to be done, since the return value stays at RAX. If the stack po...