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TheRock/compiler/amd-llvm/llvm/test/Transforms/DeadArgElim/naked_functions.ll
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2026-09-02 16:34:47 -07:00

32 lines
953 B
LLVM

; RUN: opt -S -passes=deadargelim %s | FileCheck %s
; Don't eliminate dead arguments from naked functions.
; CHECK: define internal i32 @naked(i32 %x)
define internal i32 @naked(i32 %x) #0 {
tail call void asm sideeffect inteldialect "mov eax, [esp + $$4]\0A\09ret", "~{eax},~{dirflag},~{fpsr},~{flags}"()
unreachable
}
; Don't eliminate dead varargs from naked functions.
; CHECK: define internal i32 @naked_va(i32 %x, ...)
define internal i32 @naked_va(i32 %x, ...) #0 {
tail call void asm sideeffect inteldialect "mov eax, [esp + $$8]\0A\09ret", "~{eax},~{dirflag},~{fpsr},~{flags}"()
unreachable
}
define i32 @f(i32 %x, i32 %y) {
%r = call i32 @naked(i32 %x)
%s = call i32 (i32, ...) @naked_va(i32 %x, i32 %r)
; Make sure the arguments are still there: not removed or replaced with undef.
; CHECK: %r = call i32 @naked(i32 %x)
; CHECK: %s = call i32 (i32, ...) @naked_va(i32 %x, i32 %r)
ret i32 %s
}
attributes #0 = { naked }