3787ee4571
Relands commit 433c8d950c with fixes for
MIPS.
Similar to D102742, specifying the stack alignment via CodegenOpts means
that this flag gets dropped during LTO, unless the command line is
re-specified as a plugin opt. Instead, encode this information as a
module level attribute so that we don't have to expose this llvm
internal flag when linking the Linux kernel with LTO.
Looks like external dependencies might need a fix:
* https://github.com/llvm-hs/llvm-hs/issues/345
* https://github.com/halide/Halide/issues/6079
Link: https://github.com/ClangBuiltLinux/linux/issues/1377
Reviewed By: tejohnson
Differential Revision: https://reviews.llvm.org/D103048
490 lines
15 KiB
LLVM
490 lines
15 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-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(%struct.s) %a, i32 %b, i32 %c, i32 %d)
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declare void @inalloca(<{ %struct.s }>* inalloca(<{ %struct.s }>))
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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 inreg 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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; 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 dso_local 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 8
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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(%struct.s) %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 dso_local 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* byval(%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* byval(%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* byval(%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(%struct.A))
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declare void @B_func(%struct.B* sret(%struct.B), %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 8
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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* returned %ref.tmp, %struct.A* byval(%struct.A) %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(%struct.B) %tmp, %struct.B* %ref.tmp, i32 1)
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ret void
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}
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; NORMAL-LABEL: pr34863_16
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; NORMAL: movl 4(%esp), %eax
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; NORMAL-NEXT: pushl $65535
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; NORMAL-NEXT: pushl $0
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; NORMAL-NEXT: pushl %eax
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; NORMAL-NEXT: pushl %eax
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; NORMAL-NEXT: pushl %eax
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; NORMAL-NEXT: pushl %eax
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; NORMAL-NEXT: pushl %eax
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; NORMAL-NEXT: pushl %eax
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; NORMAL-NEXT: calll _eightparams16
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; NORMAL-NEXT: addl $32, %esp
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;
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; NOPUSH-LABEL: pr34863_16
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; NOPUSH: subl $32, %esp
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; NOPUSH-NEXT: movl 36(%esp), %eax
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; NOPUSH-NEXT: movl %eax, 20(%esp)
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; NOPUSH-NEXT: movl %eax, 16(%esp)
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; NOPUSH-NEXT: movl %eax, 12(%esp)
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; NOPUSH-NEXT: movl %eax, 8(%esp)
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; NOPUSH-NEXT: movl %eax, 4(%esp)
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; 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
|
|
}
|