llvm-6502/test/Transforms/DeadArgElim/dead_vaargs.ll
Reid Kleckner fad8d818db musttail: Don't eliminate varargs packs if there is a forwarding call
Also clean up and beef up this grep test for the feature.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216425 91177308-0d34-0410-b5e6-96231b3b80d8
2014-08-26 00:59:51 +00:00

37 lines
1.2 KiB
LLVM

; RUN: opt < %s -deadargelim -S | FileCheck %s
define i32 @bar(i32 %A) {
call void (i32, ...)* @thunk(i32 %A, i64 47, double 1.000000e+00)
%a = call i32 (i32, ...)* @has_vastart(i32 %A, i64 47, double 1.000000e+00)
%b = call i32 (i32, ...)* @no_vastart( i32 %A, i32 %A, i32 %A, i32 %A, i64 47, double 1.000000e+00 )
%c = add i32 %a, %b
ret i32 %c
}
; CHECK-LABEL: define i32 @bar
; CHECK: call void (i32, ...)* @thunk(i32 %A, i64 47, double 1.000000e+00)
; CHECK: call i32 (i32, ...)* @has_vastart(i32 %A, i64 47, double 1.000000e+00)
; CHECK: call i32 @no_vastart(i32 %A)
declare void @thunk_target(i32 %X, ...)
define internal void @thunk(i32 %X, ...) {
musttail call void(i32, ...)* @thunk_target(i32 %X, ...)
ret void
}
; CHECK-LABEL: define internal void @thunk(i32 %X, ...)
; CHECK: musttail call void (i32, ...)* @thunk_target(i32 %X, ...)
define internal i32 @has_vastart(i32 %X, ...) {
%valist = alloca i8
call void @llvm.va_start(i8* %valist)
ret i32 %X
}
; CHECK-LABEL: define internal i32 @has_vastart(i32 %X, ...)
declare void @llvm.va_start(i8*)
define internal i32 @no_vastart(i32 %X, ...) {
ret i32 %X
}
; CHECK-LABEL: define internal i32 @no_vastart(i32 %X)