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https://github.com/RPCS3/llvm-mirror.git
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bd41682a42
Summary: A small bit that I missed when I updated the X86 backend to account for the Win64 calling convention on non-Windows. Now we don't use dead non-volatile registers when emitting a Win64 indirect tail call on non-Windows. Should fix PR23710. Test Plan: Added test for the correct behavior based on the case I posted to PR23710. Reviewers: rnk Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D10258 llvm-svn: 239111
67 lines
1.6 KiB
LLVM
67 lines
1.6 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-pc-linux | FileCheck %s
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declare x86_64_win64cc void @win64_callee(i32)
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declare x86_64_win64cc void (i32)* @win64_indirect()
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declare x86_64_win64cc void @win64_other(i32)
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declare void @sysv_callee(i32)
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declare void (i32)* @sysv_indirect()
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declare void @sysv_other(i32)
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define void @sysv_caller(i32 %p1) {
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entry:
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tail call x86_64_win64cc void @win64_callee(i32 %p1)
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ret void
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}
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; CHECK-LABEL: sysv_caller:
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; CHECK: subq $40, %rsp
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; CHECK: callq win64_callee
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; CHECK: addq $40, %rsp
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; CHECK: retq
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define x86_64_win64cc void @win64_caller(i32 %p1) {
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entry:
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tail call void @sysv_callee(i32 %p1)
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ret void
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}
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; CHECK-LABEL: win64_caller:
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; CHECK: callq sysv_callee
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; CHECK: retq
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define void @sysv_matched(i32 %p1) {
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tail call void @sysv_callee(i32 %p1)
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ret void
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}
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; CHECK-LABEL: sysv_matched:
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; CHECK: jmp sysv_callee # TAILCALL
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define x86_64_win64cc void @win64_matched(i32 %p1) {
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tail call x86_64_win64cc void @win64_callee(i32 %p1)
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ret void
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}
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; CHECK-LABEL: win64_matched:
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; CHECK: jmp win64_callee # TAILCALL
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define x86_64_win64cc void @win64_indirect_caller(i32 %p1) {
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%1 = call x86_64_win64cc void (i32)* @win64_indirect()
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call x86_64_win64cc void @win64_other(i32 0)
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tail call x86_64_win64cc void %1(i32 %p1)
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ret void
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}
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; CHECK-LABEL: win64_indirect_caller:
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; CHECK: jmpq *%{{rax|rcx|rdx|r8|r9|r11}} # TAILCALL
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define void @sysv_indirect_caller(i32 %p1) {
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%1 = call void (i32)* @sysv_indirect()
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call void @sysv_other(i32 0)
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tail call void %1(i32 %p1)
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ret void
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}
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; CHECK-LABEL: sysv_indirect_caller:
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; CHECK: jmpq *%{{rax|rcx|rdx|rsi|rdi|r8|r9|r11}} # TAILCALL
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