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b3487aa334
This option has been disabled for a while, and it is going away so I can clean up the coalescer code. The tests that required physreg joining to be enabled were almost all of the form "tiny function with interference between arguments and return value". Such functions are usually inlined in the real world. The problem exposed by phys_subreg_coalesce-3.ll is real, but fairly rare. llvm-svn: 157027
75 lines
1.7 KiB
LLVM
75 lines
1.7 KiB
LLVM
; RUN: llc < %s -mcpu=generic -mtriple=x86_64-mingw32 | FileCheck %s -check-prefix=M64
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; RUN: llc < %s -mcpu=generic -mtriple=x86_64-win32 | FileCheck %s -check-prefix=W64
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; RUN: llc < %s -mcpu=generic -mtriple=x86_64-win32-macho | FileCheck %s -check-prefix=EFI
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; PR8777
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; PR8778
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define i64 @foo(i64 %n, i64 %x) nounwind {
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entry:
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%buf0 = alloca i8, i64 4096, align 1
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; ___chkstk must adjust %rsp.
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; M64: movq %rsp, %rbp
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; M64: $4096, %rax
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; M64: callq ___chkstk
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; M64-NOT: %rsp
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; __chkstk does not adjust %rsp.
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; W64: movq %rsp, %rbp
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; W64: $4096, %rax
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; W64: callq __chkstk
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; W64: subq $4096, %rsp
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; Freestanding
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; EFI: movq %rsp, %rbp
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; EFI: $[[B0OFS:4096|4104]], %rsp
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; EFI-NOT: call
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%buf1 = alloca i8, i64 %n, align 1
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; M64: leaq 15(%{{.*}}), %rax
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; M64: andq $-16, %rax
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; M64: callq ___chkstk
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; M64-NOT: %rsp
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; M64: movq %rsp, %rax
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; W64: leaq 15(%{{.*}}), %rax
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; W64: andq $-16, %rax
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; W64: callq __chkstk
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; W64: subq %rax, %rsp
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; W64: movq %rsp, %rax
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; EFI: leaq 15(%{{.*}}), [[R1:%r.*]]
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; EFI: andq $-16, [[R1]]
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; EFI: movq %rsp, [[R64:%r.*]]
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; EFI: subq [[R1]], [[R64]]
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; EFI: movq [[R64]], %rsp
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%r = call i64 @bar(i64 %n, i64 %x, i64 %n, i8* %buf0, i8* %buf1) nounwind
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; M64: subq $48, %rsp
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; M64: leaq -4096(%rbp), %r9
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; M64: movq %rax, 32(%rsp)
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; M64: callq bar
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; W64: subq $48, %rsp
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; W64: leaq -4096(%rbp), %r9
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; W64: movq %rax, 32(%rsp)
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; W64: callq bar
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; EFI: subq $48, %rsp
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; EFI: leaq -[[B0OFS]](%rbp), %r9
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; EFI: movq [[R64]], 32(%rsp)
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; EFI: callq _bar
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ret i64 %r
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; M64: movq %rbp, %rsp
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; W64: movq %rbp, %rsp
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}
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declare i64 @bar(i64, i64, i64, i8* nocapture, i8* nocapture) nounwind
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