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; RUN: opt < %s -passes=deadargelim -S | FileCheck %s
declare token @llvm.call.preallocated.setup(i32)
declare ptr @llvm.call.preallocated.arg(token, i32)
%Ty = type <{ i32, i32 }>
; Check if the pass doesn't modify anything that doesn't need changing. We feed
; an unused argument to each function to lure it into changing _something_ about
; the function and then changing too much.
; This checks if the return value attributes are not removed
; CHECK: define internal zeroext i32 @test1() #1
define internal zeroext i32 @test1(i32 %DEADARG1) nounwind {
;
;
ret i32 1
}
; This checks if the struct doesn't get non-packed
; CHECK-LABEL: define internal <{ i32, i32 }> @test2(
define internal <{ i32, i32 }> @test2(i32 %DEADARG1) {
;
;
ret <{ i32, i32 }> <{ i32 1, i32 2 }>
}
; We use this external function to make sure the return values don't become dead
declare void @user(i32, <{ i32, i32 }>)
define void @caller() {
;
;
%B = call i32 @test1(i32 1)
%C = call <{ i32, i32 }> @test2(i32 2)
call void @user(i32 %B, <{ i32, i32 }> %C)
ret void
}
; We can't remove 'this' here, as that would put argmem in ecx instead of
; memory.
define internal x86_thiscallcc i32 @unused_this(ptr %this, ptr inalloca(i32) %argmem) {
;
;
%v = load i32, ptr %argmem
ret i32 %v
}
; CHECK-LABEL: define internal x86_thiscallcc i32 @unused_this(ptr %this, ptr inalloca(i32) %argmem)
define i32 @caller2() {
;
;
%t = alloca i32
%m = alloca inalloca i32
store i32 42, ptr %m
%v = call x86_thiscallcc i32 @unused_this(ptr %t, ptr inalloca(i32) %m)
ret i32 %v
}
; We can't remove 'this' here, as that would put argmem in ecx instead of
; memory.
define internal x86_thiscallcc i32 @unused_this_preallocated(ptr %this, ptr preallocated(i32) %argmem) {
;
;
%v = load i32, ptr %argmem
ret i32 %v
}
; CHECK-LABEL: define internal x86_thiscallcc i32 @unused_this_preallocated(ptr %this, ptr preallocated(i32) %argmem)
define i32 @caller3() {
;
;
%t = alloca i32
%c = call token @llvm.call.preallocated.setup(i32 1)
%M = call ptr @llvm.call.preallocated.arg(token %c, i32 0) preallocated(i32)
store i32 42, ptr %M
%v = call x86_thiscallcc i32 @unused_this_preallocated(ptr %t, ptr preallocated(i32) %M) ["preallocated"(token %c)]
ret i32 %v
}
; CHECK: attributes #0 = { nocallback nofree nosync nounwind willreturn }
; CHECK: attributes #1 = { nounwind }
|
