forked from OSchip/llvm-project
535 lines
16 KiB
LLVM
535 lines
16 KiB
LLVM
; RUN: llc < %s -mtriple=i686-windows | FileCheck %s -check-prefix=NORMAL
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; RUN: llc < %s -mtriple=i686-windows -no-x86-call-frame-opt | FileCheck %s -check-prefix=NOPUSH
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; RUN: llc < %s -mtriple=x86_64-windows | FileCheck %s -check-prefix=X64
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; RUN: llc < %s -mtriple=i686-windows -stackrealign -stack-alignment=32 | FileCheck %s -check-prefix=ALIGNED
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; RUN: llc < %s -mtriple=i686-pc-linux | FileCheck %s -check-prefix=LINUX
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%class.Class = type { i32 }
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%struct.s = type { i64 }
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declare void @good(i32 %a, i32 %b, i32 %c, i32 %d)
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declare void @inreg(i32 %a, i32 inreg %b, i32 %c, i32 %d)
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declare x86_thiscallcc void @thiscall(%class.Class* %class, i32 %a, i32 %b, i32 %c, i32 %d)
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declare void @oneparam(i32 %a)
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declare void @eightparams(i32 %a, i32 %b, i32 %c, i32 %d, i32 %e, i32 %f, i32 %g, i32 %h)
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declare void @eightparams16(i16 %a, i16 %b, i16 %c, i16 %d, i16 %e, i16 %f, i16 %g, i16 %h)
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declare void @eightparams64(i64 %a, i64 %b, i64 %c, i64 %d, i64 %e, i64 %f, i64 %g, i64 %h)
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declare void @struct(%struct.s* byval %a, i32 %b, i32 %c, i32 %d)
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declare void @inalloca(<{ %struct.s }>* inalloca)
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declare i8* @llvm.stacksave()
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declare void @llvm.stackrestore(i8*)
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; We should get pushes for x86, even though there is a reserved call frame.
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; Make sure we don't touch x86-64, and that turning it off works.
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; NORMAL-LABEL: test1:
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; NORMAL-NOT: subl {{.*}} %esp
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; NORMAL: pushl $4
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; NORMAL-NEXT: pushl $3
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; NORMAL-NEXT: pushl $2
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; NORMAL-NEXT: pushl $1
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; NORMAL-NEXT: call
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; NORMAL-NEXT: addl $16, %esp
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; X64-LABEL: test1:
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; X64: movl $1, %ecx
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; X64-NEXT: movl $2, %edx
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; X64-NEXT: movl $3, %r8d
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; X64-NEXT: movl $4, %r9d
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; X64-NEXT: callq good
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; NOPUSH-LABEL: test1:
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; NOPUSH: subl $16, %esp
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; NOPUSH-NEXT: movl $4, 12(%esp)
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; NOPUSH-NEXT: movl $3, 8(%esp)
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; NOPUSH-NEXT: movl $2, 4(%esp)
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; NOPUSH-NEXT: movl $1, (%esp)
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; NOPUSH-NEXT: call
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; NOPUSH-NEXT: addl $16, %esp
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define void @test1() {
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entry:
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call void @good(i32 1, i32 2, i32 3, i32 4)
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ret void
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}
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; If we have a reserved frame, we should have pushes
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; NORMAL-LABEL: test2:
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; NORMAL-NOT: subl {{.*}} %esp
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; NORMAL: pushl $4
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; NORMAL-NEXT: pushl $3
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; NORMAL-NEXT: pushl $2
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; NORMAL-NEXT: pushl $1
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; NORMAL-NEXT: call
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define void @test2(i32 %k) {
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entry:
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%a = alloca i32, i32 %k
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call void @good(i32 1, i32 2, i32 3, i32 4)
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ret void
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}
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; Again, we expect a sequence of 4 immediate pushes
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; Checks that we generate the right pushes for >8bit immediates
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; NORMAL-LABEL: test2b:
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; NORMAL-NOT: subl {{.*}} %esp
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; NORMAL: pushl $4096
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; NORMAL-NEXT: pushl $3072
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; NORMAL-NEXT: pushl $2048
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; NORMAL-NEXT: pushl $1024
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; NORMAL-NEXT: call
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; NORMAL-NEXT: addl $16, %esp
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define void @test2b() optsize {
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entry:
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call void @good(i32 1024, i32 2048, i32 3072, i32 4096)
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ret void
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}
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; The first push should push a register
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; NORMAL-LABEL: test3:
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; NORMAL-NOT: subl {{.*}} %esp
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; NORMAL: pushl $4
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; NORMAL-NEXT: pushl $3
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; NORMAL-NEXT: pushl $2
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; NORMAL-NEXT: pushl %e{{..}}
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; NORMAL-NEXT: call
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; NORMAL-NEXT: addl $16, %esp
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define void @test3(i32 %k) optsize {
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entry:
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%f = add i32 %k, 1
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call void @good(i32 %f, i32 2, i32 3, i32 4)
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ret void
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}
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; We support weird calling conventions
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; NORMAL-LABEL: test4:
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; NORMAL: movl $2, %eax
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; NORMAL-NEXT: pushl $4
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; NORMAL-NEXT: pushl $3
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; NORMAL-NEXT: pushl $1
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; NORMAL-NEXT: call
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; NORMAL-NEXT: addl $12, %esp
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define void @test4() optsize {
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entry:
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call void @inreg(i32 1, i32 2, i32 3, i32 4)
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ret void
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}
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; NORMAL-LABEL: test4b:
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; NORMAL: movl 4(%esp), %ecx
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; NORMAL-NEXT: pushl $4
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; NORMAL-NEXT: pushl $3
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; NORMAL-NEXT: pushl $2
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; NORMAL-NEXT: pushl $1
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; NORMAL-NEXT: call
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; NORMAL-NEXT: ret
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define void @test4b(%class.Class* %f) optsize {
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entry:
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call x86_thiscallcc void @thiscall(%class.Class* %f, i32 1, i32 2, i32 3, i32 4)
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ret void
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}
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; When there is no reserved call frame, check that additional alignment
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; is added when the pushes don't add up to the required alignment.
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; ALIGNED-LABEL: test5:
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; ALIGNED: subl $16, %esp
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; ALIGNED-NEXT: pushl $4
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; ALIGNED-NEXT: pushl $3
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; ALIGNED-NEXT: pushl $2
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; ALIGNED-NEXT: pushl $1
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; ALIGNED-NEXT: call
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define void @test5(i32 %k) {
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entry:
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%a = alloca i32, i32 %k
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call void @good(i32 1, i32 2, i32 3, i32 4)
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ret void
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}
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; When the alignment adds up, do the transformation
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; ALIGNED-LABEL: test5b:
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; ALIGNED: pushl $8
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; ALIGNED-NEXT: pushl $7
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; ALIGNED-NEXT: pushl $6
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; ALIGNED-NEXT: pushl $5
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; ALIGNED-NEXT: pushl $4
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; ALIGNED-NEXT: pushl $3
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; ALIGNED-NEXT: pushl $2
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; ALIGNED-NEXT: pushl $1
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; ALIGNED-NEXT: call
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define void @test5b() optsize {
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entry:
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call void @eightparams(i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8)
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ret void
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}
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; When having to compensate for the alignment isn't worth it,
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; don't use pushes.
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; ALIGNED-LABEL: test5c:
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; ALIGNED: movl $1, (%esp)
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; ALIGNED-NEXT: call
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define void @test5c() optsize {
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entry:
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call void @oneparam(i32 1)
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ret void
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}
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; Check that pushing the addresses of globals (Or generally, things that
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; aren't exactly immediates) isn't broken.
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; Fixes PR21878.
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; NORMAL-LABEL: test6:
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; NORMAL: pushl $_ext
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; NORMAL-NEXT: call
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declare void @f(i8*)
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@ext = external constant i8
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define void @test6() {
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call void @f(i8* @ext)
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br label %bb
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bb:
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alloca i32
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ret void
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}
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; Check that we fold simple cases into the push
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; NORMAL-LABEL: test7:
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; NORMAL-NOT: subl {{.*}} %esp
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; NORMAL: movl 4(%esp), [[EAX:%e..]]
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; NORMAL-NEXT: pushl $4
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; NORMAL-NEXT: pushl ([[EAX]])
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; NORMAL-NEXT: pushl $2
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; NORMAL-NEXT: pushl $1
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; NORMAL-NEXT: call
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; NORMAL-NEXT: addl $16, %esp
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define void @test7(i32* %ptr) optsize {
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entry:
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%val = load i32, i32* %ptr
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call void @good(i32 1, i32 2, i32 %val, i32 4)
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ret void
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}
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; Fold stack-relative loads into the push, with correct offset
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; In particular, at the second push, %b was at 12(%esp) and
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; %a wast at 8(%esp), but the second push bumped %esp, so %a
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; is now it at 12(%esp)
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; NORMAL-LABEL: test8:
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; NORMAL: pushl $4
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; NORMAL-NEXT: pushl 12(%esp)
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; NORMAL-NEXT: pushl 12(%esp)
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; NORMAL-NEXT: pushl $1
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; NORMAL-NEXT: call
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; NORMAL-NEXT: addl $16, %esp
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define void @test8(i32 %a, i32 %b) optsize {
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entry:
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call void @good(i32 1, i32 %a, i32 %b, i32 4)
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ret void
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}
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; If one function is using push instructions, and the other isn't
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; (because it has frame-index references), then we must resolve
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; these references correctly.
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; NORMAL-LABEL: test9:
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; NORMAL-NOT: leal (%esp),
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; NORMAL: pushl $4
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; NORMAL-NEXT: pushl $3
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; NORMAL-NEXT: pushl $2
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; NORMAL-NEXT: pushl $1
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; NORMAL-NEXT: call
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; NORMAL-NEXT: addl $16, %esp
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; NORMAL-NEXT: movl (%esp), [[E1:%e..]]
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; NORMAL-NEXT: movl 4(%esp), [[E2:%e..]]
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; NORMAL-NEXT: leal 16(%esp), [[E3:%e..]]
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; NORMAL-NEXT: leal 12(%esp), [[E4:%e..]]
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; NORMAL-NEXT: pushl [[E3]]
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; NORMAL-NEXT: pushl [[E4]]
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; NORMAL-NEXT: pushl $6
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; NORMAL-NEXT: pushl [[E2]]
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; NORMAL-NEXT: pushl [[E1]]
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; NORMAL-NEXT: call
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; NORMAL-NEXT: addl $20, %esp
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define void @test9() optsize {
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entry:
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%p = alloca i32, align 4
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%q = alloca i32, align 4
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%s = alloca %struct.s, align 4
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call void @good(i32 1, i32 2, i32 3, i32 4)
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%pv = ptrtoint i32* %p to i32
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%qv = ptrtoint i32* %q to i32
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call void @struct(%struct.s* byval %s, i32 6, i32 %qv, i32 %pv)
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ret void
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}
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; We can end up with an indirect call which gets reloaded on the spot.
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; Make sure we reference the correct stack slot - we spill into (%esp)
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; and reload from 16(%esp) due to the pushes.
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; NORMAL-LABEL: test10:
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; NORMAL: movl $_good, [[ALLOC:.*]]
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; NORMAL-NEXT: movl [[ALLOC]], [[EAX:%e..]]
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; NORMAL-NEXT: movl [[EAX]], (%esp) # 4-byte Spill
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; NORMAL: nop
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; NORMAL: pushl $4
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; NORMAL-NEXT: pushl $3
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; NORMAL-NEXT: pushl $2
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; NORMAL-NEXT: pushl $1
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; NORMAL-NEXT: calll *16(%esp)
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; NORMAL-NEXT: addl $24, %esp
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define void @test10() optsize {
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%stack_fptr = alloca void (i32, i32, i32, i32)*
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store void (i32, i32, i32, i32)* @good, void (i32, i32, i32, i32)** %stack_fptr
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%good_ptr = load volatile void (i32, i32, i32, i32)*, void (i32, i32, i32, i32)** %stack_fptr
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call void asm sideeffect "nop", "~{ax},~{bx},~{cx},~{dx},~{bp},~{si},~{di}"()
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call void (i32, i32, i32, i32) %good_ptr(i32 1, i32 2, i32 3, i32 4)
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ret void
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}
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; We can't fold the load from the global into the push because of
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; interference from the store
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; NORMAL-LABEL: test11:
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; NORMAL: movl _the_global, [[EAX:%e..]]
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; NORMAL-NEXT: movl $42, _the_global
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; NORMAL-NEXT: pushl $4
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; NORMAL-NEXT: pushl $3
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; NORMAL-NEXT: pushl $2
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; NORMAL-NEXT: pushl [[EAX]]
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; NORMAL-NEXT: call
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; NORMAL-NEXT: addl $16, %esp
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@the_global = external global i32
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define void @test11() optsize {
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%myload = load i32, i32* @the_global
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store i32 42, i32* @the_global
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call void @good(i32 %myload, i32 2, i32 3, i32 4)
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ret void
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}
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; Converting one mov into a push isn't worth it when
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; doing so forces too much overhead for other calls.
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; NORMAL-LABEL: test12:
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; NORMAL: pushl $8
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; NORMAL-NEXT: pushl $7
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; NORMAL-NEXT: pushl $6
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; NORMAL-NEXT: pushl $5
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; NORMAL-NEXT: calll _good
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define void @test12() optsize {
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entry:
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%s = alloca %struct.s, align 4
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call void @struct(%struct.s* %s, i32 2, i32 3, i32 4)
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call void @good(i32 5, i32 6, i32 7, i32 8)
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call void @struct(%struct.s* %s, i32 10, i32 11, i32 12)
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ret void
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}
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; But if the gains outweigh the overhead, we should do it
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; NORMAL-LABEL: test12b:
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; NORMAL: pushl $4
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; NORMAL-NEXT: pushl $3
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; NORMAL-NEXT: pushl $2
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; NORMAL-NEXT: pushl $1
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; NORMAL-NEXT: calll _good
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; NORMAL-NEXT: addl $16, %esp
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; NORMAL=NEXT: movl (%esp), %eax
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; NORMAL=NEXT: movl 4(%esp), %ecx
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; NORMAL=NEXT: pushl $8
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; NORMAL=NEXT: pushl $7
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; NORMAL=NEXT: pushl $6
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; NORMAL=NEXT: pushl %ecx
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; NORMAL=NEXT: pushl %eax
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; NORMAL=NEXT: calll _struct
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; NORMAL=NEXT: addl $20, %esp
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; NORMAL=NEXT: pushl $12
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; NORMAL=NEXT: pushl $11
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; NORMAL=NEXT: pushl $10
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; NORMAL=NEXT: pushl $9
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; NORMAL=NEXT: calll _good
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; NORMAL=NEXT: addl $16, %esp
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define void @test12b() optsize {
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entry:
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%s = alloca %struct.s, align 4
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call void @good(i32 1, i32 2, i32 3, i32 4)
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call void @struct(%struct.s* %s, i32 6, i32 7, i32 8)
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call void @good(i32 9, i32 10, i32 11, i32 12)
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ret void
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}
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; Make sure the add does not prevent folding loads into pushes.
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; val1 and val2 will not be folded into pushes since they have
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; an additional use, but val3 should be.
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; NORMAL-LABEL: test13:
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; NORMAL: movl ([[P1:%e..]]), [[V1:%e..]]
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; NORMAL-NEXT: movl ([[P2:%e..]]), [[V2:%e..]]
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; NORMAL-NEXT: , [[ADD:%e..]]
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; NORMAL-NEXT: pushl [[ADD]]
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; NORMAL-NEXT: pushl ([[P3:%e..]])
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; NORMAL-NEXT: pushl [[V2]]
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; NORMAL-NEXT: pushl [[V1]]
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; NORMAL-NEXT: calll _good
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; NORMAL: movl [[P3]], %eax
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define i32* @test13(i32* inreg %ptr1, i32* inreg %ptr2, i32* inreg %ptr3) optsize {
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entry:
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%val1 = load i32, i32* %ptr1
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%val2 = load i32, i32* %ptr2
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%val3 = load i32, i32* %ptr3
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%add = add i32 %val1, %val2
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call void @good(i32 %val1, i32 %val2, i32 %val3, i32 %add)
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ret i32* %ptr3
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}
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; Make sure to fold adjacent stack adjustments.
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; LINUX-LABEL: pr27140:
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; LINUX: subl $12, %esp
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; LINUX: .cfi_def_cfa_offset 16
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; LINUX-NOT: sub
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; LINUX: pushl $4
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; LINUX: .cfi_adjust_cfa_offset 4
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; LINUX: pushl $3
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; LINUX: .cfi_adjust_cfa_offset 4
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; LINUX: pushl $2
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; LINUX: .cfi_adjust_cfa_offset 4
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; LINUX: pushl $1
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; LINUX: .cfi_adjust_cfa_offset 4
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; LINUX: calll good
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; LINUX: addl $28, %esp
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; LINUX: .cfi_adjust_cfa_offset -28
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; LINUX-NOT: add
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; LINUX: retl
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define void @pr27140() optsize {
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entry:
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tail call void @good(i32 1, i32 2, i32 3, i32 4)
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ret void
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}
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; Check that a stack restore (leal -4(%ebp), %esp) doesn't get merged with a
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; stack adjustment (addl $12, %esp). Just because it's a lea doesn't mean it's
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; simply decreasing the stack pointer.
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; NORMAL-LABEL: test14:
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; NORMAL: calll _B_func
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; NORMAL: leal -4(%ebp), %esp
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; NORMAL-NOT: %esp
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; NORMAL: retl
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%struct.A = type { i32, i32 }
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%struct.B = type { i8 }
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declare x86_thiscallcc %struct.B* @B_ctor(%struct.B* returned, %struct.A* byval)
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declare void @B_func(%struct.B* sret, %struct.B*, i32)
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define void @test14(%struct.A* %a) {
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entry:
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%ref.tmp = alloca %struct.B, align 1
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%agg.tmp = alloca i64, align 4
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%tmpcast = bitcast i64* %agg.tmp to %struct.A*
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%tmp = alloca %struct.B, align 1
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%0 = bitcast %struct.A* %a to i64*
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%1 = load i64, i64* %0, align 4
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store i64 %1, i64* %agg.tmp, align 4
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%call = call x86_thiscallcc %struct.B* @B_ctor(%struct.B* %ref.tmp, %struct.A* byval %tmpcast)
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%2 = getelementptr inbounds %struct.B, %struct.B* %tmp, i32 0, i32 0
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call void @B_func(%struct.B* sret %tmp, %struct.B* %ref.tmp, i32 1)
|
|
ret void
|
|
}
|
|
|
|
; NORMAL-LABEL: pr34863_16
|
|
; NORMAL: movl 4(%esp), %eax
|
|
; NORMAL-NEXT: pushl $65535
|
|
; NORMAL-NEXT: pushl $0
|
|
; NORMAL-NEXT: pushl %eax
|
|
; NORMAL-NEXT: pushl %eax
|
|
; NORMAL-NEXT: pushl %eax
|
|
; NORMAL-NEXT: pushl %eax
|
|
; NORMAL-NEXT: pushl %eax
|
|
; NORMAL-NEXT: pushl %eax
|
|
; NORMAL-NEXT: calll _eightparams16
|
|
; NORMAL-NEXT: addl $32, %esp
|
|
;
|
|
; NOPUSH-LABEL: pr34863_16
|
|
; NOPUSH: subl $32, %esp
|
|
; NOPUSH-NEXT: movl 36(%esp), %eax
|
|
; NOPUSH-NEXT: movl %eax, 20(%esp)
|
|
; NOPUSH-NEXT: movl %eax, 16(%esp)
|
|
; NOPUSH-NEXT: movl %eax, 12(%esp)
|
|
; NOPUSH-NEXT: movl %eax, 8(%esp)
|
|
; NOPUSH-NEXT: movl %eax, 4(%esp)
|
|
; NOPUSH-NEXT: movl %eax, (%esp)
|
|
; NOPUSH-NEXT: movl $65535, 28(%esp)
|
|
; NOPUSH-NEXT: andl $0, 24(%esp)
|
|
; NOPUSH-NEXT: calll _eightparams16
|
|
; NOPUSH-NEXT: addl $32, %esp
|
|
define void @pr34863_16(i16 %x) minsize nounwind {
|
|
entry:
|
|
tail call void @eightparams16(i16 %x, i16 %x, i16 %x, i16 %x, i16 %x, i16 %x, i16 0, i16 -1)
|
|
ret void
|
|
}
|
|
|
|
; NORMAL-LABEL: pr34863_32
|
|
; NORMAL: movl 4(%esp), %eax
|
|
; NORMAL-NEXT: pushl $-1
|
|
; NORMAL-NEXT: pushl $0
|
|
; NORMAL-NEXT: pushl %eax
|
|
; NORMAL-NEXT: pushl %eax
|
|
; NORMAL-NEXT: pushl %eax
|
|
; NORMAL-NEXT: pushl %eax
|
|
; NORMAL-NEXT: pushl %eax
|
|
; NORMAL-NEXT: pushl %eax
|
|
; NORMAL-NEXT: calll _eightparams
|
|
; NORMAL-NEXT: addl $32, %esp
|
|
;
|
|
; NOPUSH-LABEL: pr34863_32
|
|
; NOPUSH: subl $32, %esp
|
|
; NOPUSH-NEXT: movl 36(%esp), %eax
|
|
; NOPUSH-NEXT: movl %eax, 20(%esp)
|
|
; NOPUSH-NEXT: movl %eax, 16(%esp)
|
|
; NOPUSH-NEXT: movl %eax, 12(%esp)
|
|
; NOPUSH-NEXT: movl %eax, 8(%esp)
|
|
; NOPUSH-NEXT: movl %eax, 4(%esp)
|
|
; NOPUSH-NEXT: movl %eax, (%esp)
|
|
; NOPUSH-NEXT: orl $-1, 28(%esp)
|
|
; NOPUSH-NEXT: andl $0, 24(%esp)
|
|
; NOPUSH-NEXT: calll _eightparams
|
|
; NOPUSH-NEXT: addl $32, %esp
|
|
define void @pr34863_32(i32 %x) minsize nounwind {
|
|
entry:
|
|
tail call void @eightparams(i32 %x, i32 %x, i32 %x, i32 %x, i32 %x, i32 %x, i32 0, i32 -1)
|
|
ret void
|
|
}
|
|
|
|
; NORMAL-LABEL: pr34863_64
|
|
; NORMAL: movl 4(%esp), %eax
|
|
; NORMAL-NEXT: movl 8(%esp), %ecx
|
|
; NORMAL-NEXT: pushl $-1
|
|
; NORMAL-NEXT: pushl $-1
|
|
; NORMAL-NEXT: pushl $0
|
|
; NORMAL-NEXT: pushl $0
|
|
; NORMAL-NEXT: pushl %ecx
|
|
; NORMAL-NEXT: pushl %eax
|
|
; NORMAL-NEXT: pushl %ecx
|
|
; NORMAL-NEXT: pushl %eax
|
|
; NORMAL-NEXT: pushl %ecx
|
|
; NORMAL-NEXT: pushl %eax
|
|
; NORMAL-NEXT: pushl %ecx
|
|
; NORMAL-NEXT: pushl %eax
|
|
; NORMAL-NEXT: pushl %ecx
|
|
; NORMAL-NEXT: pushl %eax
|
|
; NORMAL-NEXT: pushl %ecx
|
|
; NORMAL-NEXT: pushl %eax
|
|
; NORMAL-NEXT: calll _eightparams64
|
|
; NORMAL-NEXT: addl $64, %esp
|
|
;
|
|
; NOPUSH-LABEL: pr34863_64
|
|
; NOPUSH: subl $64, %esp
|
|
; NOPUSH-NEXT: movl 68(%esp), %eax
|
|
; NOPUSH-NEXT: movl 72(%esp), %ecx
|
|
; NOPUSH-NEXT: movl %ecx, 44(%esp)
|
|
; NOPUSH-NEXT: movl %eax, 40(%esp)
|
|
; NOPUSH-NEXT: movl %ecx, 36(%esp)
|
|
; NOPUSH-NEXT: movl %eax, 32(%esp)
|
|
; NOPUSH-NEXT: movl %ecx, 28(%esp)
|
|
; NOPUSH-NEXT: movl %eax, 24(%esp)
|
|
; NOPUSH-NEXT: movl %ecx, 20(%esp)
|
|
; NOPUSH-NEXT: movl %eax, 16(%esp)
|
|
; NOPUSH-NEXT: movl %ecx, 12(%esp)
|
|
; NOPUSH-NEXT: movl %eax, 8(%esp)
|
|
; NOPUSH-NEXT: movl %ecx, 4(%esp)
|
|
; NOPUSH-NEXT: movl %eax, (%esp)
|
|
; NOPUSH-NEXT: orl $-1, 60(%esp)
|
|
; NOPUSH-NEXT: orl $-1, 56(%esp)
|
|
; NOPUSH-NEXT: andl $0, 52(%esp)
|
|
; NOPUSH-NEXT: andl $0, 48(%esp)
|
|
; NOPUSH-NEXT: calll _eightparams64
|
|
; NOPUSH-NEXT: addl $64, %esp
|
|
define void @pr34863_64(i64 %x) minsize nounwind {
|
|
entry:
|
|
tail call void @eightparams64(i64 %x, i64 %x, i64 %x, i64 %x, i64 %x, i64 %x, i64 0, i64 -1)
|
|
ret void
|
|
}
|