search for: l_qux

...tment > +; after the function call > > Not sure if I understand this. Can you illustrate with an example? Sure The code generated used to be _array: subl $12, %esp movss LCPI1_0, %xmm0 mulss 16(%esp), %xmm0 movss %xmm0, (%esp) call L_qux$stub mulss LCPI1_0, %xmm0 addl $12, %esp ret FastCC use to be caller pops arguments so there was no stack adjustment after the call to qux. Now FastCC has callee pops arguments on return semantics so the x86 backend inserts a stack adjustment after the call. _a...

...> Not sure if I understand this. Can you illustrate with an example? > > Sure > > The code generated used to be > _array: > subl $12, %esp > movss LCPI1_0, %xmm0 > mulss 16(%esp), %xmm0 > movss %xmm0, (%esp) > call L_qux$stub > mulss LCPI1_0, %xmm0 > addl $12, %esp > ret > > FastCC use to be caller pops arguments so there was no stack > adjustment after the > call to qux. Now FastCC has callee pops arguments on return semantics > so the > x86 backend inserts a...

...antics > > so the > > x86 backend inserts a stack adjustment after the call. > > > > _array: > > subl $12, %esp > > movss LCPI1_0, %xmm0 > > mulss 16(%esp), %xmm0 > > movss %xmm0, (%esp) > > call L_qux$stub > > subl $4, %esp << stack adjustment because qux pops > > arguments on return > > mulss LCPI1_0, %xmm0 > > addl $12, %esp > > ret $4 > > Ok. Please make sure for now this only takes effect if tail call &gt...

Hi Arnold, This is a very good first step! Thanks! Comments below. Evan Index: test/CodeGen/X86/constant-pool-remat-0.ll =================================================================== --- test/CodeGen/X86/constant-pool-remat-0.ll (revision 42247) +++ test/CodeGen/X86/constant-pool-remat-0.ll (working copy) @@ -1,8 +1,10 @@ ; RUN: llvm-as < %s | llc -march=x86-64 | grep LCPI | count 3 ;

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...>>> x86 backend inserts a stack adjustment after the call. >>> >>> _array: >>> subl $12, %esp >>> movss LCPI1_0, %xmm0 >>> mulss 16(%esp), %xmm0 >>> movss %xmm0, (%esp) >>> call L_qux$stub >>> subl $4, %esp << stack adjustment because qux pops >>> arguments on return >>> mulss LCPI1_0, %xmm0 >>> addl $12, %esp >>> ret $4 >> >> Ok. Please make sure for now this only takes...